3-11 July 2007
Merida, Mexico
Mexico/General timezone
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Posters 1 + Coffee

Place

Location: Merida, Mexico
Room: Regency (Hyatt)
Date: from 4 Jul 14:45 to 5 Jul 16:15

Description

OG 1.1, 1.2, 1.3, 1.4, 1.5; HE 1.1.A, 1.1.B, 1.2.A, 1.2.B, 1.3.A, 1.3.B, 1.4.A, 1.4.B; SH 1.2-1.7, 2.1-2.4

Contribution List

Displaying 250 contributions out of 250
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.4 Board #: 180 (9B)
Based on a large series (N=14038) of daily solar-wind densities, we obtained the fluctuation power spectrum. The spectrum shows that the 399-day variation (the synodic period of Jupiter) has the largest amplitude in the interval of periods from 20 to 800 day. It is second in magnitude only to the secular, 22- ,and 11-year variations. The amplitudes of the 399-day variations in solar-wind ... More
Presented by Dr. Vladislav TIMOFEEV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A
A method to reconstruct the 3-dimensional structure of extensive air showers, seen by fluorescence detectors, is described. The observation of the shower is done in 2-dimensional pixels, for consecutive time bins. Time corresponds to a third dimension. Assuming that the cosmic ray shower propagates as a plane wave front moving at the speed of light, a complex 3D volume in space can be a ... More
Presented by Sofia ANDRINGA
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4
We analyze the 3He-rich event observed with EPHIN sensor on board the SOHO spacecraft. Results are presented here and possible scenarios are discused.
Presented by Dr. Luis DEL PERAL
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
MAGIC-II is the upgrade project of the Magic telescope, consisting of a twin telescope frame with innovative features to lower the threshold energy further. An ultrafast signal sampling was developed to reduce the effect of the diffuse night sky background. The new acquisition system is based upon a low power analog sampler (Domino Ring Sampler) with a frequency of 2 GHz while data are digitiz ... More
Presented by Dr. nicola TURINI
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 136 (7A)
A proximity focusing Cherenkov imager called CHERCAM (CHERenkov CAMera) has been added to the Cosmic Ray Energetics and Mass (CREAM) instrument for its forthcoming balloon flight in Antarctica. The detector is optimized for charge measurements with nearly constant resolution over the range of nuclear charge between Z = 1 and about 26 (Fe). The Cherenkov radiator is a 108 x108 cm2 plane of two ... More
Presented by Dr. Michel BUÉNERD on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 143 (7B)
The Track Imaging Cerenkov Experiment (TrICE) is an air Cerenkov telescope designed to use multi-anode photomultipliers to achieve a high angular resolution for measuring cosmic-ray composition at TeV-PeV energies. The TrICE camera, composed of 16 Hamamatsu R8900 16-channel multi-anode photomultiplier tubes achieves 0.086 degree pixel spacing over 1.5 degree field of view. We present ... More
Presented by Dr. Karen BYRUM on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 095 (5B)
The first phase experiment of the Tibet hybrid experiment to measure the energy spectrum of the light components (proton and helium) strongly suggested that the knee region should be dominated by heavy components. A new type of air shower core detector Tibet-YAC (Yangbajing Air shower Core detector) as well as Tibet-MD (a large underground muon detector array) are being planned. In this paper, ... More
Presented by Dr. Jing HUANG on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
The highest energy measurements of cosmic ray electrons extend just beyond 1 TeV. High energy electrons are of particular interest because energy losses during interstellar propagation insure that they arrive primarily from nearby sources. This may produce observable structure in their spectrum. Further, it is predicted that electrons and positrons result from the annihilation of many e ... More
Presented by Dr. james ADAMS
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 122 (6B)
We discuss the diffusive acceleration mechanism in SNR shocks in terms of its potential to accelerate CRs to 10$^18 eV, as observations imply. One possibility, currently discussed in the literature, is to resonantly generate a turbulent magnetic field via accelerated particles in excess of the background field. We analyze some problems of this scenario and suggest a different mechanism, which ... More
Presented by Mikhail MALKOV
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
The Cosmic Ray Energetics And Mass (CREAM) instrument is designed to measure the composition and energy spectra of cosmic rays up to an energy of ~ 10^15 eV. CREAM has had two successful long-duration balloon (LDB) flights, launched from McMurdo Station, Antarctica, for 42 days in 2004/2005 and 28 days in 2005/2006. In both flights CREAM employed a 20 radiation length tungsten/scintillat ... More
Presented by Dr. Hoseok AHN
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 038 (2B)
The KASCADE-Grande experiment at Forschungszentrum Karlsruhe, Germany, measures extensive air showers initiated by primary particles with energies between 100 TeV and 1 EeV. Detector pulses digitized by a Flash-ADC based data acquisition system were unfolded to study the arrival times of secondary particles separately for the electromagnetic and the muonic shower component. Muons arrive on av ... More
Presented by Dr. Paul DOLL on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A
Four FT-detectors were used for the determination of the shower arrival direction in the Turku air shower array. Three were located in the apices of a nearly equilateral triangle, and the fourth lay in the centre of the triangle. The hit times of the shower front were recorded relative to the central FT. Timing data of three detectors is sufficient to determine the shower arrival direction, as ... More
Presented by Ms. Anne-Marie ELO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 009 (1A)
A shape of lateral distribution for charged particles in events with energy above 10**19eV is considered. Two methods were used for individual LDF parametrization. In the first approach, the index of power was determined for generalized Greisen-Linsley approximation. In second, mean square radius of the shower was determined for approximation proposed by Lagutin et al. Comparison of resulted p ... More
Presented by Mr. Artem SABOUROV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A
Experimental data obtained at the Yakutsk array after its modernization in 1993 are analyzed. To describe the lateral distribution function of charged particles, a function suggested by Lagutin et al. was used. The dependence of the mean square radius of function R(m.s.), characterizing the shape of LDF, on the shower energy and maximum depth of EAS development has been determined. It is shown ... More
Presented by Mr. Artem SABOUROV
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 118 (6B)
The discovery of direct evidence for the acceleration of high energetic particles at the shell supernova remnant RXJ1713.7-3946 underlined the need to calculate the cosmic ray (CR) distribution in the Galaxy on a spatial grid fine enough to resolve the changes in the CR density due to these kind of objects. It was shown before by Buesching et al 2005 that the discrete nature (both in space and ... More
Presented by Dr. Ingo BUESCHING on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 103 (5B)
Primary Cosmic Ray (PCR) Mass Composition analysis performed on the basis of Pamir Collaboration X-Ray Emulsion Chambers (XREC) data. A number of selection criteria of gamma - families initiated by primary protons are considered by Tashkent group. It is shown that the fraction of registered gamma-families, originating from primary PA-interaction, consist of ~ 70-80 % at the energies Eest ... More
Presented by Prof. Toymas YULDASHBAEV
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.5 Board #: 167 (8B)
Acceleration of charge particles in stochastic electric fields is considered. The fractional symmetric Fokker-Planck equation is derived on the basis of the Langevin equations and with an assumption that the fluctuations of electric fields are subordinated by the Levy stable laws. From the solution of the equation it is showed that an ensemble of charge particles is relaxed to the power ... More
Presented by Mr. Ivan ZIMOVETS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B Board #: 035 (2B)
Accuracies of numerical Fourier and Hankel transforms are examined with the Takahasi-Mori theory of error evaluation. The higher Moliere terms both for spatial and projected distributions derived by these methods agree very well with those derived analytically. The methods will be valuable to solve other transport problems concerning fast charged particles.
Presented by Prof. Takao NAKATSUKA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
A vast mass is expelled from the sun’s low corona and travels at high speed into interplanetary space. These sporadic transient eruptions known as coronal mass ejection are dynamic large –scale events in the solar corona that expel plasma and magnetic field through the solar wind to interplanetary medium. We have studied the solar cycle variation of various properties of coronal mass ... More
Presented by Mrs. Kavita NEMA
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 145 (7B)
The Advanced Thin Ionization Calorimeter (ATIC), a balloon-borne experiment, is designed to investigate the composition and energy spectra of cosmic rays of charge Z = 1 to 26 over the energy range ~ 10^11 - ~ 10^14 eV. The instrument consists of a silicon matrix charge detector, plastic scintillator strip hodoscopes interleaved with graphite interaction targets, and an 18 radiation leng ... More
Presented by Dr. Hoseok AHN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 086 (5A)
The measured decrease of the abundance ratio of secondary to primary Galactic cosmic-ray nuclei is explained by the steep increase of the cosmic-ray parallel mean free path with magnetic rigidity that results from the weakly nonlinear transport theory of cosmic rays in the turbulent Galactic magnetic fields. Because the ratio of fluctuating to ordered magnetic fields in the Galaxy is large, th ... More
Presented by Dr. Andreas SHALCHI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 065 (4A)
The study of the arrival direction of Ultra High Energy Cosmic Rays UHECRs potentially gives us an insight on their origin. In this poster we present a search for event structures in the sky in which the arrival direction of the events lie on a great circle (the arc structure) in High Resolution Fly?s Eye (HiRes). The arc structure is expected when charged cosmic rays get deflected while pa ... More
Presented by Prof. Charlie JUI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 064 (4A)
Measuring the cosmic gamma ray flux at super-GZK energies is of significance in both interpreting the GZK effect and putting constraints on exotic models of the origin of ultrahigh energy cosmic rays. At these energies, gamma ray primaries interact with the earth's magnetic field before they enter the atmosphere. We have developed a simulation of gamma ray preshowers to study their effect on t ... More
Presented by Mr. Andrew O'NEILL on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 062 (3B)
In this paper, the average EAS longitudinal development profile is measured using HiRes stereoscopic data. Event by event the shower longtitudinal curve is obtained. The shower maximum is found out using a local fitting. After normalizing by shower maximum size and age an average longitudinal profile is obtainned. Several functions are tested in fitting this average profile. The Gaisser-Hilla ... More
Presented by Bingkai ZHANG
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 179 (9B)
In the present work analogous analysis has been made for the extreme events occurred during July 2005. Specifically, rather intense Forbush decrease was observed at different neutron monitors all over the world during 16 July 2005. It started some hours before arrival of a weak shock associated with a CME from 14 July 2005. It is rather a peculiar event, as it is not a ground level enhan ... More
Presented by Dr. SANTOSH KUMAR
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 096 (5B)
For the chemical composition in the "knee" energy region, we observe air shower core with hybrid detectors in Tibet, Yangbajin(4,300 m a.s.l.). We use the Tibet III air-shower array for the determination of the primary energy and the burst detector for the measurement of the energy flow of air shower core. Previous phase of our experiment used emulsion chamber(X-ray films and nuclear emuls ... More
Presented by Mr. Tatsumi OUCHI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 033 (2B)
The arrival directions of ultrahigh energy extensive air showers by the Yakutsk and AGASA array data have been considered. It is shown that 3 very high ultrahigh energy showers with E>10^20 eV registered at the Yakutsk array correlate with the nearest pulsars. The problem of cosmic ray origin is discussed.
Presented by Dr. Alexei MIKHAILOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 071 (4A)
We analyze arrival time of air shower using Hirosaki AS Arrays. This array consists of 5 scintillation detectors with GPS antenna for arrival times. We use Erlang Distribution. The number of air showers observed within short time windows is analized by using arrival time difference of k-events serial air showers. We report the results of the analysis.
Presented by Prof. Nobusuke TAKAHASHI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 200 (10B)
Expansion speed for limb CMEs has been shown to be a good approximation to determine the radial speed. In this work we present an analytical model to obtain from lateral expansion the radial propagation speed of CMEs. We found that the relation between expansion and lateral speeds depends as well on the angular width. We compare the results of the analytical model with the parameters of limb C ... More
Presented by Ms. Guadalupe MUÑOZ MARTÍNEZ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B Board #: 034 (2B)
General higher terms of Moliere series are solved analytically, in Moliere- Heisenberg definite integral and/or Goldstein series. The terms of higher orders up to n=6 are practically obtained. Applicable region of Moliere series is extended to shorter depths of penetration down to B=5 by the results.
Presented by Prof. Takao NAKATSUKA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 002 (1A)
The EAS characteristics relating to the lateral development of a shower at sea level are considered, namely, a mean square radius for the spatial distribution of charged particles, the total number of charged particles and muons with E(th) >= 1 GeV and their correlation at fixed energy; the longitudinal development of a shower in the atmosphere, i.e. a maximum depth of EAS. The energy-dependen ... More
Presented by Dr. Stanislav KNURENKO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 148 (8A)
BESS-Polar II (the 2nd version of the BESS-Polar spectrometer) has been prepared for the next Antarctic campaign planned in December 2007. The aim of the experiment is precise measurement of the low-energy antiproton spectrum and to search for antimatter at this solar minimum period, with 5 times higher sensitivity than the total of previous measurements in BESS-Polar I. Most of the detector ... More
Presented by Dr. Thomas HAMS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 133 (7A)
The project CROSS (Cosmic Rays Over Spectrum Steepening) is intended for direct measurements of mass and energy of PCR in energy range 1013-1015 eV including the region of knee in PCR energy spectrum. The experimental technique is balloon-born generators of transit X-ray radiation interposed with proportional counters. Each of four generators consists of 125 Dacron films, total thickness ... More
Presented by Dr. Alexander BORISOV
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 130 (7A)
We carried out a balloon observation of cosmic rays using the CALET prototype at the Sanriku Balloon Center of the Japan Aerospace Exploration Agency. The prototype detector consists of 1024 scintillating fibers for track imaging and 24 BGO scintillator bricks for total absorption of cosmic rays. The observation was carried at altiude between 35 and 37 km for about 4 hours. We measured e ... More
Presented by Dr. Yuki SHIMIZU on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 092 (5A)
Silicon sensors with 64 pixels of 1 cm^2 area and 500 micron thickness were developed as building blocks of a large array for the charge identification of cosmic ray nuclei in balloon-borne or space-based experiments. A small telescope of sensors was exposed to pion and proton beams, interacting in a target, at CERN. Experimental results on the performance of the sensors will be reported.
Presented by Prof. Pier Simone MARROCCHESI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4
Proton fluxes are observed as integral 5-minute averages for energies > 10 MeV, given in particle flux units (pfu), measured by GOES spacecraft. Proton events associated with flares tend to occur in sunspot region with field strength of 1500-2500 G and under specific configuration. Proton events associated active regions have large H alpha-flare index values (usually more than 100 sfu) a ... More
Presented by Ms. roopali TRIPATHI
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 159 (8B)
An investigation has been made so as to study the cosmic-ray decreases occurring during 2006 with respect to the arrival times of interplanetary shocks and magnetic clouds. We have identified three interplanetary magnetic cloud events during 5, February 2006, 13 April 2006 and 14 April 2006. The interplanetary magnetic field (B), north south component of interplanetary magnetic field (Bz ... More
Presented by Dr. REKHA AGARWAL MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 001 (1A)
The differential energy spectrum of cosmic rays from Cherenkov radiation measurements in EAS in the energy range of 10**15 - 10**20 eV has been compared with an anomalous diffusion model for the particles in interstellar space having fractal properties (Lagutin et al., 2001). Calculations of the spectrum have been carried out for each of five types of primary nuclei: p, He, C, Mg, Fe, and the ... More
Presented by Dr. Stanislav KNURENKO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 111 (6A)
The first flight of the Cosmic Ray Energetics And Mass (CREAM) balloon experiment employed a Timing Charge Detector (TCD) and a Calorimeter. For high energy events a large background of back splash particles are created in the Calorimeter, which wash out the low Z charge peaks in the TCD. Traditionally, highly pixelated detectors are used in this situation in order to reduce the effects of the ... More
Presented by Taylor CHILDERS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
The CREAM-III calorimeter was calibrated at CERN in October 2006, in preparation for a flight in December 2007. The calorimeter consists of twenty 3.5 mm thick tungsten plates interleaved with 20 layers of 0.5 mm scintillating fiber ribbons, for a total depth of 20 radiation lengths. The calorimeter is preceded by two graphite target layers with a total depth of 0.5 proton interaction lengths ... More
Presented by Mr. Y. S. YOON
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment designed to study high energy cosmic rays. The CREAM-III instrument is being prepared for a planned flight in Antarctica during the 2007/8 season. The CREAM-III calorimeter was exposed to high energy electron and proton beams at CERN’s H2 beam line in October 2006 for testing and calibration. A 4-layer silicon strip b ... More
Presented by Ms. JI HYE HAN
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 124 (6B)
The Cosmic Ray Energetics And Mass (CREAM) calorimeter is designed to measure the spectra of cosmic-ray particles over the energy range from ~10^12 eV to ~10^15 eV. Its first flight as part of the CREAM-I balloon-borne payload in Antarctica during the 2004/05 season resulted in a record breaking 42 days of exposure to the cosmic radiation. A few iterations of the calibration using various bea ... More
Presented by Mr. Y. S. YOON on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 117 (6B)
Current efforts in ground-based VHE gamma-ray astronomy use two methods: Atmospheric Cherenkov Telescopes (ACTs) and Extended Air Shower (EAS) Arrays. While ACTs typically have greater sensitivity to gamma-ray point sources and lower energy thresholds, EAS arrays have an enormous advantage in exposure to the sky due to their large fields of view (1-2 sr) and high duty cycle (>~90%). The lower ... More
Presented by Dr. Andrew SMITH on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2
In all kinds of blind searches such as all sky survey for point sources, the number of trials is an important factor to estimate the chance probability of a signal being statistical fluctuation of background. A term `chance occurrence' is defined in this presentation, the operation and the application of which is discussed. With help of it, search results can be physically and selectively c ... More
Presented by Dr. Zhiguo YAO
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 163 (8B)
Presenter’s Name and affiliation : Mahendra Pratap Yadav Deptt. of Physics, Govt. Tilak P.G. College, Katni (M.P.), 483501, INDIA Title of Paper : Characteristics of CMEs with respect to their source region during 23rd sunspot cycle. Mahendra Pratap Yadav Email : mp_yadav2005@yahoo.com Preferred presentation type : Oral/Poster Suggested session code - SH : 1.7 Ordered list of autho ... More
Presented by Prof. mahendera PRATAP
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 116 (6B)
The Trans-Iron Galactic Element Recorder (TIGER) was launched in December 2001 and 2003 from McMurdo, Antarctica and was designed to observe elements ranging from 14 < Z < 40 over an extended energy range. Observations of radioactive isotopes produced during explosive nucleosynthesis such as Ni-59 that decay only through electron capture provide important constraints on the delay between nucl ... More
Presented by Dr. G. A. DE NOLFO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 106 (6A)
In the present work, after our work about the extragalactic gamma ray flux in direction of Coma supercluster , with considering the Virgo proton flux and considering a constant gamma to proton ratio for the very high energy cosmic rays in first approximation, the extragalactic proton flux in Coma direction is calculated. we have studied that is it possible that the coma supercluster be a ... More
Presented by Mrs. Pantea DAVOUDIFAR
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4 Board #: 162 (8B)
A comparison of the energetic neutral atom observations by CELIAS/HSTOF with the Voyager 1 measurements of the termination shock particles in the heliosheath shows that the ENA hydrogen flux is consistent with Voyager 1 data. On the other hand, the ENA He flux is much higher than expected from the helium ion fluxes measured by Voyager 1. We discuss possible explanations and implications ... More
Presented by Dr. Andrzej CZECHOWSKI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 173 (9A)
The majority solar energetic particle events exhibit exponential-law decays for few-MeV protons. Profiles of mid-relativistic electrons, however, are of predominantly power-law shape. The comparison of experimental values of decay times, tau(obs), with those obtained in theoretical models considering convection transport and adiabatic deceleration shows that the expected values tau(theo ... More
Presented by Dr. Karoly KECSKEMETY on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 088 (5A)
The CALorimetric Electron Telescope (CALET) mission is proposed for the observation of high energy cosmic rays and gamma radiation for the JEM-EF attached payload on the International Space Station. The instrument, equipped with an imaging calorimeter of scintillating fibers (IMC) and a total absorption BGO calorimeter (TASC), is optimized for the measurement of cosmic ray electrons in the TeV ... More
Presented by Prof. Pier Simone MARROCCHESI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 059 (3B)
In the context of the report by the AGASA experiment of an apparent excess in the cosmic ray flux above the energy of the expected GZK feature, a variety of "top-down models" have been proposed for the origin of ultra-high-energy cosmic rays (UHECRs). These models involve the decay of supermassive particles and generically predict high neutrino and photon fluxes at ultra-high energy. Relying o ... More
Presented by Dr. Dmitri SEMIKOZ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 115 (6A)
When testing and calibrating particle detectors in a test beam, accurate tracking information independent of the detector being tested is extremely useful during offline analysis of the data. A general purpose Silicon Beam Tracker (SBT) was constructed with an active area of 32.0 x 32.0 mm^2 to provide this capability for the Cosmic Ray Energetics And Mass (CREAM) calorimeter. The tracke ... More
Presented by H. S. AHN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
A silicon microstrip Tracker embedded in a 0.8 T magnetic field constitutes the core of the AMS-02 experiment. Eight layers of double sided microstrip sensors perform simultaneous measurements of position and energy loss in silicon along the particle trajectory. The silicon tracker will determine the rigidity (R) and the charge sign of particles up to several TVs, with a relative resolution ... More
Presented by Dr. Giovanni AMBROSI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 028 (2A)
The light emitted by an extensive air shower undergoes scattering on molecules and aerosols in the atmosphere. The scattering effect not only attenuates the light, but also contributes to the signal recorded by a detector. Hence, this effect directly influences the determination of shower energy. In routine analyses so far only contributions from direct and singly-scattered Cherenkov photons h ... More
Presented by Prof. Henryk WILCZYNSKI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
Solar energetic particle events are classified into two classes impulsive and gradual on the basis of their abundance, duration and associated soft X-ray flares. The gradual SEPs are more intense and longer in duration events and associated with fast coronal mass ejections .The impulsive SEPs known as 3He rich (Z rich) events are typically short lived and small compared to the large grad ... More
Presented by Dr. A.P MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4
In 1949 Fermi proposed the stochastic acceleration as a particle acceleration mechanism. Fermi spoke of large clouds magnetized that were the responsible for this acceleration. In this work I have focused in the stochastic acceleration due to fluctuations of the magnetic field of small scale that show to be extremely efficient accelerating. I show that with a force of 10e-16 N a proton ... More
Presented by Dr. Hector Javier DURAND-MANTEROLA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 048 (3A)
We have installed a new air shower array at Mount Chacaltaya (5,200m above sea level) to observe primary cosmic rays with energies greater than 10^15 eV. In our previous experiments, we measured energy spectrum and nuclear composition of primary cosmic rays around the knee region. Above all, we obtained the cosmic ray composition with three independent techniques, namely from the equi-i ... More
Presented by Dr. Yoshiki TSUNESADA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 011 (1B)
Simulations of ultra high energy showers that may be generated by different primaries and observed with space detectors are performed. A special driver is developed which enables to treat neutrino as a primary particle in the framework of the traditional codes (AIRES, CORSIKA). Possibilities of the TUS detector employment for ultra high energy neutrino studies are discussed.
Presented by Mr. Jorge COTZOMI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 110 (6A)
The first flight of the Cosmic Ray Energetics And Mass (CREAM) balloon experiment flew for a record breaking 42 days from McMurdo Station in Antarctica and utilized a Calorimeter, a Transition Radiation Detector, and a Timing Charge Detector to measure charge and energy. Galactic cosmic ray propagation models make predictions that fit current low energy spectra. With the high energy data colle ... More
Presented by Taylor CHILDERS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1
Precise knowledge of the hadronic component of cosmic rays is needed to describe the cosmic ray production, acceleration and propagation mechanisms in our galaxy. Present measurements suffer from limitations coming from short exposure time, intrinsic instrumental limitations and restricted energy range. The AMS-02 experiment is a large acceptance magnetic spectrometer to perform high statisti ... More
Presented by Dr. vitali CHOUTKO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 047 (3A)
Basing on the EAS simulations with CORSIKA we investigate the lateral distributions of electrons with a fixed energy in large showers. We show how these distributions scale with electron energy, with air density and/or shower age. We fit some analytical functions to describe them in an easy way. This work is necessary when reconstructing the shower parameters from the light images obtained ... More
Presented by Prof. Maria GILLER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B Board #: 036 (2B)
Moliere simultaneous distribution between the deflection angle and the lateral displacement is derived by applying numerical Fourier transforms on the solution for frequency distribution acquired through Kamata-Nishimura formulation of Moliere theory. The differences of our result from that under the gaussian approximation and the basic properties of our distribution are investigated clo ... More
Presented by Prof. Takao NAKATSUKA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 005 (1A)
The study of Ultra High Energy Cosmic Rays represents one of the most challenging topic in this field. The interaction of primary particles with atmospheric nuclei produces a huge Extensive Air Shower together with isotropic emission of UV fluorescence light and highly directional Cherenkov photons, that are reflected/diffused isotropically by the impact on the Earth's surface or on h ... More
Presented by M. C. MACCARONE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 102 (5B)
It was reported that the discrepancy between results of different balloon-borne experiments with calorimeter-type emulsion chambers (JACEE and RUNJOB) were critical for understanding the origin of cosmic rays and the acceleration mechanisms in the Galaxy. Based on our previous study of the emulsion chamber detectors, we search for mundane scenarios that could led the analysis astray. ... More
Presented by Dr. Vladimir KOPENKIN
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 186 (9B)
We have developed a method for determining ICME (Interplanetary coronal mass ejection) geometry from galactic cosmic ray data recorded by the ground- based muon detector network. The cosmic ray density depression inside the ICME, which is the cause of a Forbush decrease, is represented as an expanding cylinder based on a theoretical model of the cosmic ray particle diffusion. ICME geometr ... More
Presented by Dr. Takao KUWABARA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 132 (7A)
We have a plan to apply CALET (CALorimetric Electron Telescope) to make observations of high energy cosmic rays, electrons, gamma-rays, and nuclei, on the International Space Station (ISS). The detector of CALET consists of an imaging calorimeter (IMC) and a total absorption calorimeter (TASC). We have been developing front end circuits for the IMC and TASC. We also made a scale model (1 ... More
Presented by Dr. Yuki SHIMIZU on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 131 (7A)
We have been developing the CALET instrument, which is proposed to be launched on the Japanese Experiment Module (JEM), Exposed Facility (EF) of the ISS. CALET consists of an imaging calorimeter (IMC) and a total absorption calorimeter (TASC). The role of IMC is identification of the incident particle by imaging the shower tracks with scintillating fibers. TASC is used for observing the t ... More
Presented by Dr. yusaku KATAYOSE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 125 (6B)
The observation of trans-iron nuclei in galactic cosmic rays (Z30) requires a high performance cosmic ray detector telescope with a very large exposure area because of their extremely low fluxes. It is realized by the use of solid-state track detector of CR-39, which has an advantage of easy extension of exposure area. The verification of mass and nuclear charge identifications with CR-39 s ... More
Presented by Mr. Satoshi KODAIRA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B
Direct cosmic ray muon fluxes (muons produced in the atmosphere in j/psi-meson decays) are calculated on the base of accelerator data on j/psi production in a nucleon-nucleus interaction and of their extrapolation to higher energies. It is shown that bremsstrahlung photons from these muons are to be taken into account when EAS data at very high energies are interpreted (for example, whe ... More
Presented by Dr. Liudmila VOLKOVA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 052 (3A)
The muon component of extensive air shower (EAS) initiated by primaries having energy in the knee region of energy-spectrum is studied by measuring their density (Rho_muon) for different threshold energies using the muon magnet-spectrographs (mdm~500 GeV/c) of NBU air shower array. The lateral distribution of muons for different shower sizes and muon energies are obtained. In this paper ... More
Presented by Dr. Rabin CHHETRI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 056 (3B)
The measurements of electron density at different locations of shower front incident with different zenith angle (theta) from 0 to 60 degree, obtained by NBU Air Shower array (Latitude: 26 degree 42 min. North and Longitude: 88 degree 21 min. East and about 130 m above sea level), are studied to investigate correlation between lateral shower age (s) with atmospheric depth and electron si ... More
Presented by Dr. Rabin CHHETRI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 016 (1B)
The scale and scope of the physics studied at the Auger Observatory offer significant opportunities for original outreach work. Education, outreach and public relations of the Auger collaboration are coordinated in a separate task whose goals are to encourage and support a wide range of education and outreach efforts that link schools and the public with the Auger scientists and the science of ... More
Presented by Prof. Gregory SNOW on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 113 (6A)
The balloon-borne Cosmic Ray Energetics And Mass (CREAM) investigation is designed to make direct measurements of high energy cosmic-ray particles at the top of the atmosphere. The Silicon Charge Detector (SCD) provides charge measurements of all primary particles from protons to iron nuclei. As the SCD is mounted above the calorimeter, albedo particles backscattered from the calorimeter ... More
Presented by J. YANG on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 057 (3B)
In order to investigate the effects of the fluorescence energy error distributions on the determination of the ultra high energy cosmic ray (UHECR) spectrum we developed a Monte Carlo simulation of fluorescence telescopes using the HiRes and Auger telescopes as examples. We show that the energy error distribution (EED) for this kind of detector cannot be adequately represented by Gaussian or ... More
Presented by Mr. Washington, Jr. CARVALHO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 043 (3A)
KASCADE-Grande, located at Forschungszentrum Karlsruhe, is a multi detector experiment for the measurement of extensive air showers induced by primary cosmic rays in the energy range of $10^{14}-10^{18}$ eV. With its 0.5 km$^2$ large field detector, in combination with the muon detectors of the KASCADE array, it allows the reconstruction of both the total electron and muon numbers, which are ... More
Presented by Dr. - - on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4 Board #: 188 (10A)
In order to fit observational data of solar particle charge states, two different models have been developed, to study the evolution of charge during their source acceleration. :(1) on basis to high energy electron loss and capture cross sections, from laboratory experiments in atomic and ionized hydrogen gases, under the assumption of an interaction process of two different populat ... More
Presented by Prof. JORGE PEREZ-PERAZA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 140 (7B)
The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) was flown eight times from Lynn Lake, Manitoba, Canada between 1993 and 2002. The performance of the instrument was improved with essentially each successive flight, and precise spectral measurements of cosmic-ray hydrogen and helium isotopes were made during different phases of the solar modulation. This paper prese ... More
Presented by Eun-Suk SEO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.3 Board #: 198 (10B)
The Solar Neutron Telescope (SNT) at Mt. Sierra Negra in Mexico (19.0°N, 97.3°W) is taking data since June of 2004. A solar neutron event was registered by this SNT, associated with the flare of September 7 of 2005, at the minimum phase of solar cycle 23. In this work we calculate the energy spectrum for this solar neutron event, using the attenuation model by Dorman & Valdés-Galicia (J. G ... More
Presented by Dr. Luis Xavier GONZÁLEZ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
In recent years, several different experiments have been flown to directly measure high energy cosmic-ray nuclei. To measure the energy of cosmic ray particles including protons and helium nuclei with reasonable accuracy at TeV-scale requires use of a calorimeter. This paper defines energy reach in a configuration-independent way and describes a method to compare a new design to existing exp ... More
Presented by Dr. Opher GANEL
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B
Recently we suggested a method which improves the precision of studies of the primary composition of ultra-high-energy cosmic rays. Two principal ingredients of the method are (1) comparison of the observed and simulated parameters for individual showers, without averaging over arrival directions and (2) event-by-event selection of simulated showers by the physical observables and not by the ... More
Presented by Dr. Dmitry GORBUNOV
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment designed to study high energy cosmic-ray nuclei through direct measurements at the top of the atmosphere. CREAM incorporates a suite of detectors, including a 20 radiation length (X0) sampling tungsten/scintillating-fiber calorimeter. The calorimeter is comprised of 20 active layers of 0.5 mm diameter fibers grouped in 1 cm ... More
Presented by Dr. Opher GANEL
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 158 (8B)
According to the time variations of the cosmic ray (CR) rigidity spectrum parameters the dynamic processes are researched in the interplanetary space, and it is found that the variation of electromagnetic characteristics of heliosphere begins before the sporadic phenomena on the Sun. In particular, it is shown that before the sporadic phenomena the decrease of generation of local polariz ... More
Presented by Dr. Olga KRYAKUNOVA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1
TRACER was launched on a long-duration balloon flight from Kiruna, Sweden, in 2006. Since circumglobal flights are still not permitted in the Northern Hemisphere, this flight had to be terminated in northern Canada after 4.5 days. For this flight, the dynamic range of the TRACER system was extended, so that all elements from boron (Z = 5) to iron (Z = 26) could be included in the measurement ... More
Presented by Dr. Maximo AVE
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 194 (10A)
A new Muon Spaceweather Telescope for Anisotropies dedicated to spaceweather forecast is presently under construction in Greifswald (MuSTAnG), Germany. MuSTAnG in its present configuration consists of 8 m2 (2 x 4 m2) of scintillator plates in 2 layers. Each scintillator plate has a size of 0.25 m2 and is connected via wavelength-shifting fibres to a photomultiplier unit with integrated high-v ... More
Presented by Prof. Rainer HIPPLER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A
Four pairs of liquid scintillators were used for determining the density of the electromagnetic (EM) component of air showers in the Turku air shower array. Three of these Density Detectors (DD) were located in the apices of a nearly equilateral triangle, whose sides were approximately 19.5 metres. The fourth DD lay in the centre of the triangle. The DDs consisted of two liquid scintillators s ... More
Presented by Ms. Anne-Marie ELO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A
In the framework of scaling formalism, a parameter R(m.s.) (mean square radius) of the EAS charged particle lateral distribution function in the wide energy interval is analyzed. The fluctuations of R(m.s.) and their comparison with calculated values according to the QGSJET model in the case of different primary nuclei are given. The probable mass composition of cosmic rays in the region of su ... More
Presented by Mr. Artem SABOUROV
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 181 (9B)
Forbush decreases in relation to CME related shocks and solar wind disturbances. P.L. VERMA Department of Physics Govt. Vivekanand P.G. College Maihar Distt. Satna (M.P.) India ABSTRACT Coronal mass ejections (CMEs) are the most energetic events in the heliosphere and are widely recognized as being responsible for production of large disturbances in solar wind, t ... More
Presented by Dr. PL VERMA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
We analyze data of NM-64 on Mt. Hermon of peculiarities of Forbush effects and precursory effects in total and different multiplicities of neutron intensity according to many years’ observations. By comparison with data on other CR stations and by the method of coupling functions (see review in [1]) we estimate the energy spectrum of these effects and possibility to use precursory effe ... More
Presented by Dr. Lev PUSTILNIK
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 197 (10B)
It is well known that energy spectrum of solar energetic particles (SEP), observed by ground based neutron monitors and muon telescopes (in high energy region; the transfer to the space from the ground observations is made by the method of coupling functions, see in [1], Chapter 3), and by detectors on satellites and space-probes (in small energy region) changed with time very much (usua ... More
Presented by Prof. Lev DORMAN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 101 (5B)
The Tibet air shower array, which has an effective area of 37,000 square meters and is located at 4300 m in altitude, has been observing air showers induced by cosmic rays with energies above a few TeV. We have a plan to add a large muon detector array to it for the purpose of increasing its sensitivity to cosmic gamma rays in the 100 TeV energy region by discriminating them from cosmic-ray h ... More
Presented by Mr. Takashi SAKO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 114 (6A)
The CREAM instrument is a balloon-borne detector designed to measure the cosmic-ray spectrum in the 1-1000TeV energy range, with good charge resolution from protons to iron (Z = 1 to 26). The CREAM instrument has had two successful flights, both from McMurdo Station, Antarctica. CREAM-I was flown in the 2004-2005 Antarctic summer campaign and CREAM-II in 2005-2006, with a combined flight durat ... More
Presented by Mr. Samuel MOGNET on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4 Board #: 182 (9B)
The high energy ionizing radiation environment in the solar system consists of three main sources: the radiation belts, galactic cosmic rays and solar energetic particles. Geant4 is a Monte Carlo radiation transport simulation toolkit, with applications in areas as high energy physics, nuclear physics, astrophysics or medical physics research. In this poster, Geant4 applications to model and s ... More
Presented by Dr. Bernardo TOMÉ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
Coronal mass ejections (CMEs) have the ability to significantly disturb geospace, after reaching the CME plasma near Earth. In the present paper, the statistical results of the geoeffectiveness of coronal mass ejections (CMEs) and magnetic clouds (MCs) during solar cycle 23 (1996-2006) have been presented. We compare the non-cloud CMEs with those of MCs.We have found that 71% of all fron ... More
Presented by Dr. A.P. MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 015 (1B)
The experimental technique of fluorescence light observation is used in current and planned air shower experiments that aim at understanding the origin of ultra-high energy cosmic rays. In the fluorescence technique, the geometry of the shower is reconstructed based on the correlation between viewing angle and arrival time of the signals detected by the telescope. The signals are compare ... More
Presented by Dr. Markus RISSE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 190 (10A)
It is generally believed that Forbush Decrease (FD) events happen simultaneously over the globe of the Earth. However, there have been reports on non-simultaneous FD events. We investigate the properties of non- simultaneous FD events in order to determine what solar wind conditions lead to global simultaneity of FD events. We examined the hourly data of the Oulu Neutron Monitor (NM) ... More
Presented by Dr. Su Yeon OH on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 184 (9B)
We present the results of a study of the annual frequency distribution of cosmic ray decreases (amplitude ≥ 3%) for five solar activity cycles (19 to 23), using Climax neutron monitor hourly counting rate data. We confirm the main result of our earlier study, on a similar topic, over a shorter time interval (cyles 20, 21, and 22) that there is a notable gap in the distribution, near the maxi ... More
Presented by Prof. Harjit AHLUWALIA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 109 (6A)
If taken into account, the transmission of the particle-scattering turbulence --in addition to just the particles-- through the shock front can change the effective compression ratio felt by the accelerating particles significantly from the compression of the underlying plasma. This can lead to significantly harder energy spectra than what are traditionally predicted assuming frozen-in turbule ... More
Presented by Dr. Joni TAMMI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
Major X-ray flare events have been selected to study the latitudinal and longitudinal distribution of flares during solar cycle 23.The occurrence of geomagnetic storms (Dst magnitude ≤-100 nT) associated with X-ray flares, coronal mass ejections (CMEs) and solar radio emissions (SREs) has been analyzed for the period of 1996 to2005. Though, X-ray flares (Type M, X & Total X-flares) are ... More
Presented by Dr. A.P. MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 187 (10A)
IceTop is an air shower array now under construction at the South Pole. It is the surface component of IceCube, an observatory primarily focused on cosmic neutrinos. When completed, IceTop will have approximately 500 square meters of collecting area in the form of 160 separate ice Cherenkov detectors. These detectors are sensitive to electrons, photons, muons and neutrons. With the high ... More
Presented by Dr. Takao KUWABARA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 067 (4A)
Point-like excesses have been alternately claimed and refuted in the direction of Cygnus X-3, BL-Lacertae objects, and others. We conduct a search for point- like deviations from isotropy in the arrival direction of ultra-high energy cosmic rays in the monocular data set collected by the High-Resolution Fly's Eye. We find no evidence for point-like excesses and place a 90% c.l. upper l ... More
Presented by Ms. Malina KIRN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 127 (7A)
The handling of solid-state track detector (SSTD) has been historically required for a long period and many human powers to scan and analyze etch-pits produced on the detector. Because a large area greater than a few m^2 detector is required to observe ultraheavy nuclei in galactic cosmic rays, a high speed scanning system is practically important to realize our observation. We have developed ... More
Presented by Mr. Satoshi KODAIRA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 160 (8B)
Abstract In this work, we have identified the two types of high-speed streams using the spacecraft data during high amplitude days. The behaviour of high-speed solar wind streams during high amplitude anisotropic wave trains is investigated for the period 1981-1994. The two types of solar wind streams (corotating streams and flare-generated streams) produce significant deviations in cosmi ... More
Presented by Dr. SHARAD TIWARI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 074 (4B)
The chemical composition of Ultra-High-Energy (UHE) comic rays is one of unsolved mysteries, and its study will give us fruitful information on the origin and acceleration mechanism of UHE cosmic rays. Especially, a detection of UHE gamma-rays by hybrid experiments, such as AUGER and TA, will be a key to solve these questions. The characteristics of UHE gamma-ray showers have been studied on l ... More
Presented by Mr. Yoshimitsu WADA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 119 (6B)
The CREAM (Cosmic Ray Energetics And Mass) data acquisition (CDAQ) system showed excellent stability and robustness during the 2004/05 and 2005/06 Antarctic campaigns. The CREAM-III Calorimeter, scheduled to be launched in December 2007, was calibrated at a CERN test beam in October 2006. During the beam test, the CDAQ software, running on a non-flight Beam Test Computer (BTC) system, c ... More
Presented by Prof. Eun-Suk SEO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 149 (8A)
PAMELA is a satellite-borne experiment designed to study the charged component of the cosmic radiation of galactic, solar and trapped nature. The main scientific objective is the study of the antimatter component of cosmic rays over a wide range of energies. PAMELA is mounted on the Resurs DK1 satellite that was launched on June 15th 2006 from the Baikonur cosmodrome and is now on a semipolar ... More
Presented by Dr. Silvio ORSI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 134 (7A)
PAMELA cosmic-ray detector is orbiting around the Earth on board the Resurs DK1 satellite since June 2006. The experiment is designed to study charged particles in the cosmic radiation, being optimized in particular for antiprotons and positrons. The core of the telescope is a magnetic spectrometer equipped with several detectors. Six planes of silicon microstrip sensors are placed inside the ... More
Presented by Massimo BONGI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 154 (8A)
The PAMELA space experiment was launched into orbit on June 15th from the Baikonur Cosmodrome, Kazakhstan, on-board a Resurs-DK1 satellite. The primary objective for PAMELA is to accurately measure the antiproton (80 MeV - 190 GeV) and positron (50 MeV - 270 GeV) component of the cosmic radiation. PAMELA consists of a permanent magnet spectrometer, a time-of-flight system, an electromagnetic ... More
Presented by Mr. Petter HOFVERBERG
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 032 (2B)
Influence of a registration threshold on an increase of the number of inclined extensive air showers with zenith angles greater than approximately 50 degree by data of Yakutsk EAS array is considered. An increase beginning at the energy above 10**18 eV, that has been established earlier is caused by the limited energy range of EAS array. Such an increase can be for lesser energies also. A ... More
Presented by Ms. Elena NIKIFOROVA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 046 (3A)
The paper concerns the images in the fluorescence light of EAS of ultra-high energies. The effect of the multiple scattering of the light in the atmosphere on the way from the shower to the observer is investigated. We show what are the relevant parameters of the geometry for describing this effect. We also show that when analysing the scattered light not delayed too much (with respect to the ... More
Presented by Prof. Maria GILLER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 153 (8A)
We present results from the operation of the high mountain array of 4 water Cherenkov detectors located at 4550 m. a.s.l. located at Sierra Negra mountain (N 18 59.1, W 97 18.76 ) near of Puebla city in Mexico. The detectors consist of 4 light-tight cylindrical containers of 4 m2 cross section separated 25m. The vertices of the array form a triangle with one detector in the middle. The detect ... More
Presented by Dr. Humberto SALAZAR on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 020 (1B)
EAS events are developing in the last few 10 kilometers of their path. But geomagnetic field has been extended until a few thousand kilometers from the ground. This field deflects charged particles. The deflection is different for different directions and observers. These differences is due to amount and direction of the geomagnetic field (a dipole at the centre of the earth) and the directio ... More
Presented by Dr. Mehdi KHAKIAN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 021 (1B)
Actually until the shower maximum the effect of the atmosphere is: 'an environment for extension of EAS events', but after it the 'absobtion effect of the atmosphere' will be dominant. Since the shower maximum for ~100 TeV is ~550 gr/cm^2(~5000m a.s.l), and we are always after it (1200m a.s.l) specially for higher zenith angle events. So actually in the energy and the site we have to con ... More
Presented by Dr. Mehdi KHAKIAN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A
M. M. Sherif (a), O. W. Ibrahim(b), S. M. Kamil(a), Y.M. Assran(d), G. Nabil(c), A. Mahrous (b), O. A. Mousa (a) (a) Physics department, Faculty of Science, Cairo University (b) Physics department, Faculty of Science, Helwan University (c) Physics department, Faculty of Engineering, BUE (d) Mathematics and Science department, Faculty of Petroleum and Mining Engineering, Suez Canal Unive ... More
Presented by Prof. Mohamed SHERIF
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3
Often the interplanetary parameters used for the study of solar-terrestrial relationships are solar wind speed (V), the total interplanetary magnetic field (B) and the southward component of IMF (Bz) measured by satellites and space probes. Both, hourly and daily values of these parameters have usually been employed to associate with parameters defining terrestrial effects. On a day-to- d ... More
Presented by Mr. vidya charan DWIVEDI
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 123 (6B)
Our galaxy is filled with relativistic nuclei and electrons, or galactic cosmic rays(GCRs). The source of GCR nuclei, especially ultraheavy nuclei(Z>30), is still unknown, though the measurement of ultraheavy cosmic rays has been identified as an important goal of cosmic-ray research. Observation program of ultra-heavy nuclei in GCRs is proposed with the use of solid-state track detector on bo ... More
Presented by Prof. Nobuyuki HASEBE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 152 (8A)
We explore what can be learned about the sources of UHECRs from their large-angular-scale clustering (referred to as their "bias" by the cosmology community). Exploiting the clustering on large scales has the advantage over small-scale correlations of being insensitive to uncertainties in source direction from magnetic smearing or measurement error. In a Cold Dark Matter cosmology, the ampl ... More
Presented by Prof. Glennys FARRAR
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 050 (3A)
The energy is among the characteristics of Ultra High Energy Cosmic Rays (E>5 x 1019 eV) which could be estimated experimentally. The following paper attempts to estimate the energy of an UHECR proton by applying a Monte Carlo simulation code. A number of extensive air showers, vertical and inclined, is simulated to derive the Lateral Distribution Functions of the shower muons. The scenar ... More
Presented by Dr. Olga MALANDRAKI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 069 (4A)
The normalization constant of the lateral distribution function (LDF) of an extensive air shower is a monotonous (almost linear) increasing function of the energy of the primary, as well as a monotonous decreasing function of the distance from the shower core. Therefore, the interpolated signal at some fixed distance from the core can be calibrated to estimate the energy of the shower. There i ... More
Presented by Mr. Germán ROS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A
The ARGO-YBJ experiment, installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China), is an air shower array exploiting the full coverage approach at very high altitude. Signals from each RPC are picked-up by strips 6 cm wide and 62 cm long, thus allowing to sample the Extensive Air Showers (EAS) with an unprecedented granularity. In order to extend the dynamic range ... More
Presented by Dr. Min ZHA
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.2 Board #: 178 (9A)
Richardson et al. [1996] statistically investigated CIR-driven modulations of Galactic Cosmic Ray (GCR) density with the data obtained by satellites. By examining depressions caused by CIRs with and without the Sector Boundary (SBs), they concluded that SBs do not organize the GCR density. On the other hand, a 22-year cycle in the amplitude of depressions was also confirmed. They suggested tha ... More
Presented by Mr. Yoshitaka OKAZAKI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A
It has been known almost for the last 40 years that UHE cosmic ray EAS emit pulsed radio emission in the LF-VLF range[1][2][3].We have been detecting UHE cosmic ray air shower with the mini-array method[4][5]. A VLF receiver system is setup near the mini-array hut[6].The received signals are observed using DSO(Tektronix TDS-520A) and stored in PC via GPIB-PCI(NI-488.2) .Power spectral density ... More
Presented by Mr. Nayanmoni SAIKIA
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.2
Magnetic cloud is a large interplanetary structure produced due to transient injection in the ambient solar wind. In this work two events of magnetic clouds [(i) October 18–20, 1995 and (ii) July, 1–2, 1996] have been selected and their relationship with cosmic rays, geomagnetic and interplanetary parameters have been examined. From this analysis, it is observed that Bz components of I ... More
Presented by Prof. Muni Prasad MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 202 (10B)
Magnetic clouds, as subsets of Interplanetary Coronal Mass Ejections, are modulating the interplanetary space. We present six observed magnetic clouds and simulate them according to the circular and the new elliptic cylindrical models. Both models correspond to magnetic clouds attached to the sun and the simulations estimate the characteristics of the clouds, such probable shapes, orientat ... More
Presented by Dr. Olga MALANDRAKI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 191 (10A)
A strong magnetic storm occurred in January 21st, 2005. During this magnetic storm, fluxes of electrons trapped in the radiation belt were observed simultaneously with two low altitude satellites, CORONAS-F and SERVIS-1 and some geostationary satellites, LANLs. During under developing of the magnetic storm, both of the velocity and the dynamic pressure of solar wind increased by two discrete s ... More
Presented by Dr. Makoto HAREYAMA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 070 (4A)
We introduce a new Maximum Likelihood method for analyzing cross correlations between a catalog of candidate astrophysical sources and Ultrahigh Energy Cosmic Rays (UHECRs), which allows for variable source luminosities and provides a ranking of individual sources according to their likelihood of having emitted the correlated UHECRs. We use simulated data to test the validity of this and the ... More
Presented by Mr. Ronnie JANSSON on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 042 (2B)
The ARGO-YBJ experiment is a full coverage EAS-array installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China). We present the results on the angular resolution measured with different methods with the full central carpet ($\sim$5800 m$^2$). The comparison of experimental results with MC simulations is discussed.
Presented by Dr. Elvira ROSSI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 022 (2A)
Lateral distributions of electromagnetic component in extensive air showers at different zenith angles measured with the Tibet-III air shower array are compared with Monte Carlo simulations based on the interaction models of QGSJET01c and SIBYLL2.1 taking into account of the detector configurations. In this paper, we discuss the sensitivity of the lateral distribution of the electromagnetic c ... More
Presented by Dr. Jing HUANG
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 031 (2A)
The air fluorescence detectors (FDs) of the Pierre Auger Observatory are vital for the determination of the energy scale. To compensate for variations in atmospheric conditions that affect shower energy determination, Auger has instituted an extensive atmospheric monitoring program. The program includes a Central Laser Facility (CLF) and an Extreme Laser Facility (XLF) to provide the FDs with ... More
Presented by Mr. Seveg BEN ZVI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 018 (1B)
Ionization loss of electrons in atmosphere, as a corresponding fraction of extensive air shower (EAS) energy dissipated along cascading, amounts to a major part of the primary particle energy. It has been shown that there is a relation between the loss and the total flux of air Cherenkov light induced by relativistic electrons where the model dependence is parameterized by the shower max ... More
Presented by Dr. Anatoly IVANOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4
Cosmic rays (CR) are thought to be accelerated in strong shocks such as supernova remnant shocks. Their acceleration, however, significantly modifies the shock environment and thus influences the acceleration process itself. The paradigm of enhanced CR acceleration by scattering them off the self-generated Alfven waves seems to explain the supernova remnant origin of galactic CRs up ... More
Presented by Dr. Mikhail MALKOV
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 097 (5B)
Elaboration of a multipurpose astrophysical orbital observatory (MAOO) INCA is continued. The MAOO is designed on basis of ionization-neutron calorimetry for the direct study of spectra and composition of high-energy primary cosmic radiation in the range ~1011 –1016 eV. Scientific goals of the project are discussed, namely, measurements of (a) the PCR charge composition and energy spectra of ... More
Presented by Prof. Rauf MUKHAMEDSHIN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 166 (8B)
The Ulysses spacecraft was close to the ecliptic at ~5 AU during the periods of enhanced solar activity in January and September 2005. The KET/Ulysses instrument registers a flux of cosmic ray protons within 5-2000 MeV, fluxes have been disturbed more than three solar rotations during the considered period. We find two periods of 27 days, when disturbances from the active region have bee ... More
Presented by Dr. Alexei STRUMINSKY on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A
The High Resolution Fly's Eye HiRes-1 detector has now been decommissioned after nearly nine years of operation. During that time span, HiRes-1 accumulated a larger atmospheric exposure to Ultra-High Energy Cosmic Rays (UHECRs) above 10^19 eV than any other experiment to date. This presents an unprecedented opportunity to search for anisotropy in the arrival directions of UHECRs. We prese ... More
Presented by Dr. Benjamin STOKES
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
Coronal Mass Ejections (CMEs) are the most important events responsible for disturbances to space weather. The dynamical parameters of CMEs are measured on images obtained by ground based and space Coronagraphs. Most of them, white light images from Thomson scattering showing the changes on structures as projected on the plane of the sky. LASCO C1, MICA and some other Coronagraphs implemented ... More
Presented by Mr. Carlos BECERRIL GORDILLO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B Board #: 019 (1B)
The multi-peak structure of the LPM showers in the lead was firstly clarified in one-dimension by Konishi et. al. ( See, E.Konishi,A.Adachi,N.Takahashi, Journal of PhysicsG,Vol.17(1991)719). In the present paper, we show multi-peak structure of the LPM shower in both the lead and tungsten in the three- dimensional way and discuss their characteristics in detail.
Presented by Prof. Akeo MISAKI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B
The problem of solution uniqueness during evaluation of primary energy spectra in the knee region using extensive air shower (EAS) data set and EAS inverse approach are investigated. It is shown that unfolding of the primary energy spectra in the knee region leads to mutually compensative extraneous solutions, which can be the reason for the observed disagreements of elemental energy spect ... More
Presented by Prof. Samvel TER-ANTONYAN
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 087 (5A)
The NASA Balloon program offers a unique, reliable and low cost platform for conducting cutting edge cosmic ray research and scientific investigations. Recently, the balloon program completed new payload support facilities in Antarctica. In addition, during the 2007 Campaign, for the first time, NASA demonstrated the ability to launch three science payloads in the same season. These Anta ... More
Presented by Dr. Magdi SAID on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 004 (1A)
The recent 'microscopic' theory of black holes (Ter-Kazarian, G.T. 2001, J. Phys. Soc. Jpn., Suppl., B 70, 84; and references therein) predicts a large flux of extremely high energy. They are produced thermally by the predominant neutrino cooling of the superdense proto-matter core (SPC) of AGN via simple or "modified" URCA processes, and pionic reactions. We calculate the neutrino flu ... More
Presented by Prof. Gagik TER-GHAZARYAN
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 066 (4A)
A simple model of a homogeneous population of cosmic accelerators injecting protons following a unique power law has long been shown to fit the HiRes monocular data very well. The model evolves the sources with redshift and adjusts both the redshift evolution and the exponent in the injecting power law to fit the data. At lower energies galactic iron is added in as suggested by composition mea ... More
Presented by Mrs. Olga BRUSOVA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 030 (2A)
FRAM - F/(Ph)otometric Robotic Atmospheric Monitor is the latest addition to the atmospheric monitoring instruments of the Pierre Auger Observatory. An optical telescope equipped with CCD camera and photometer, it automatically observes a set of selected standard stars and a calibrated terrestrial source. Primarily, the wavelength dependence of the attenuation is derived and the comparison be ... More
Presented by Dr. Petr TRAVNICEK, on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 045 (3A)
In this work we investigate new statistical parameters to infer the mass composition of high energy cosmic rays above $10^{17}$ eV. Trying to overcome the difficulties imposed by large fluctuations and limited experimental observables, we present a statistical method for composition studies based on several measurable features of the longitudinal and lateral development of the air shower. P ... More
Presented by Dr. Vitor DE SOUZA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 099 (5B)
The Cosmic Ray Energetics And Mass (CREAM) experiment is designed to investigate the source, propagation and acceleration mechanism of high energy cosmic-ray nuclei, by directly measuring their energy and charge. Incorporating a transition radiation detector (TRD) provides an energy measurement complementary to the calorimeter, as well as additional track reconstruction capability. The next ... More
Presented by Dr. Alexander MALININ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B
The study of the highest energy cosmic rays is currently of paramount importance, due to the number of questions still without an answer. Where are they produced, what kind of particles they are and how they propagate to the Earth are some of these questions. A detailed simulation program could let us know beforehand the spectral differnces among different sources and the influence of the inte ... More
Presented by Dr. Julio Cesar RODRIGUEZ MARTINO
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.3 Board #: 175 (9A)
Ions accelerated in solar flares interact with the solar atmosphere to produce gamma-ray lines and neutrons. Some of the neutrons that escape from the Sun into interplanetary space can survive to the Earth and be observed both by satellite detectors and by ground-based neutron detectors. In association with the X12.0 flare on 1991 June 4, solar neutrons were observed in space by OSSE onb ... More
Presented by Dr. Kyoko WATANABE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.2 Board #: 199 (10B)
In the present declining phase of the solar cycle, corotating interaction regions (CIRs) have once again become more prevalent. Since the launch of the two STEREO spacecraft in October 2006, at least 5 significant particle enhancements due to CIRs have been observed at 1 AU. The Low Energy Telescope (LET) on each STEREO spacecraft has been operating since mid-November 2006. This instrument ... More
Presented by Dr. Richard LESKE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 129 (7A)
It is generally believed that the cosmic rays below the ankle of the energy spectrum are of galactic origin whereas those having energies above this energy are extragalactic though there are also suggestions for lower transitional energies. We have critically examined such hybrid scenario of origin of cosmic rays and have concluded that a single type of source for all energies is more co ... More
Presented by Dr. Arunava BHADRA
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 135 (7A)
The non-linear back reaction of accelerated cosmic rays at a non-relativistic shock front leads to the formation of a smooth precursor with a length scale corresponding to the diffusive scale of the energetic particles. The instabilities present in these modified shocks may play a crucial role as past theoretical work has shown. First, it was claimed that shocklets that could be created in th ... More
Presented by Mr. Stavros DIMITRAKOUDIS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A
Several reports indicate the existence of non-random features of arrival time series of air showers observed at sea levels. The non-randomness shows fractal feature and they concluded that a new origin of source or propagation mechanism of cosmic rays are necessary. We examin these phenomena with using arrival time series of air showers observed at Mt. Chacaltaya in ten yeas. The locat ... More
Presented by Prof. Nobuharu OHMORI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A
A new tool monitoring the status of the fluorescence telescopes has been developed to guarantee smooth operation of all detector components during data taking. Monitoring data from FD telescopes are collected online regularly during data acquisition as well as in dedicated modes such as calibration. They are stored locally in databases that are replicated on a dedicated central server. A web ... More
Presented by Mr. Julian RAUTENBERG
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.B
Methodical problems of reconstruction of primary energy and mass of cosmic rays, are discussed. Dependence of reconstruction results on hadronic interaction models used for comparing with experimental data, is analyzed. It is shown, that using correlation information of different observables in extensive air shower experiments allows to decrease the influence of intrinsic fluctuations a ... More
Presented by Dr. Igor LEBEDEV
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 073 (4A)
The Astrophysics Science Project Integrating Research and Education (ASPIRE) is funded by the National Science Foundation as the public education and outreach (EPO) component the High Resolution Fly's Eye Cosmic Ray Research Group. Since 1997, ASPIRE has been creating some of the most engaging and interactive science lessons and lab activities on the World Wide Web. In this poster, we will p ... More
Presented by Ms. Julie CALLAHAN, Dr. John BELZ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 104 (5B)
PAMELA is a satellite-borne experiment that measures charged particles cosmic-ray spectra across a wide energy range up to a few hundreds of GeV. The instrument was launched on the 15^th of June 2006 onboard the Resurs-DK N.1 satellite. PAMELA instrument consists of a time-of-flight system, a magnetic spectrometer, a silicon-tungsten calorimeter,a shower detector, a neutron detector and a ... More
Presented by Dr. Vladimir MIKHAILOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 196 (10A)
A theoretical model of particle acceleration by the interaction of a magnetic field directional discontinuity and a collisionless shock is presented. The geometry of the interaction region, the relative angles of the shock, discontinuity, and magnetic field highly influences the acceleration process. In certain geometries the particles can re-enter the acceleration region again and again, whic ... More
Presented by Dr. Zoltan NEMETH on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 138 (7B)
The understanding of the particle spectra resulting from acceleration in relativistic shocks as they occur in extragalactic sources is essential for the interpretation of the Cosmic Ray spectrum above the ankle (E>3*1e18 eV). It is believed that extragalactic sources like Active Galactic Nuclei and Gamma Ray Bursts can produce particle spectra up to E~1e21 eV. In this contribution, subluminal ... More
Presented by Jan LUENEMANN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 037 (2B)
The energy spectrum of primary cosmic ray jointly with the lateral distribution function (LDF) of electrons and muons in EAS with the energy E > 10^{17} eV by data of the Yakutsk array data are presented. It is shown that in the separate energy intervals the spectrum and LDF are of different form for the events coming from the Supergalaxy (Local supercluster galactics) disk and the rest ... More
Presented by Dr. Mikhail PRAVDIN
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
The Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment to investigate the composition and energy spectra of cosmic rays at energies up to 10^15eV with a series of balloon flights. The main science objective of CREAM is to understand the source of high-energy cosmic-ray particles, their acceleration mechanisms and their propagation history in the interstellar medium. The ... More
Presented by Ms. JI HYE HAN
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 023 (2A)
The surface detector of the Pierre Auger Observatory will consist of 1600 water Cherenkov tanks sampling ground particles of air showers produced by energetic cosmic rays. The construction of the array is nearly completed and a large number of detectors have been operational for more than three years. In this paper the performance of different components of the detectors are discussed. Th ... More
Presented by Dr. Tiina SUOMIJÄRVI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 024 (2A)
The simulation of the surface detector of the Pierre Auger Observatory, consisting of water Cherenkov detectors, is based on GEANT4. Particles are explicitly tracked through a detector having realistic geometry. The simulation is accelerated by a dedicated re-implementation of the tracking of the numerous Cherenkov photons inside the tank. The simulated-tank response to cosmic muons at v ... More
Presented by Dr. Piera Luisa GHIA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.3 Board #: 176 (9A)
Observations of gamma-rays and neutrons provide information about acceleration and transport of ions in solar flares. Neutrons from the X17.2 flare on 2003 October 28 were observed by the ground-based neutron monitor at Tsumeb in Namibia. This observation was made 5 minutes before the GLE event produced by the energetic protons. The full time history of gamma rays for this event was obse ... More
Presented by Dr. Kyoko WATANABE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.B Board #: 068 (4A)
The cosmic ray energy spectrum is well known to follow a power-law over many orders of magnitude. The question of whether the spectrum exhibits a cut-off is of primary importance. Following our Astro. Part. Phys. publication (astro-ph/0610865), we describe two statistical tests and apply them to the AGASA and preliminary (ICRC-2005) Auger Cosmic Ray Energy spectra in an attempt to find d ... More
Presented by John HAGUE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 098 (5B)
The gamma rays detected by passive balloon-borne emulsion chambers in the stratosphere allow indirect testing of the conclusions based on the analysis of the primary particle tracks. Here we show that observed experimental data on gamma rays are in agreement with the atmospheric origin of their production. It can be seen that gamma rays from different passive balloon-borne experime ... More
Presented by Dr. Vladimir KOPENKIN
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 126 (6B)
Production cross section of antiprotons in proton-proton collision is presented for the study of cosmic-ray (CR) antiproton propagation in the Galaxy. We propose a semi-empirical cross section of antiprotons with only three parameters, the average multiplicity, the average transverse momentum of antiprotons, and the deformation parameter, giving the deformation from the isotropic angula ... More
Presented by Prof. Toru SHIBATA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 144 (7B)
We study the feasibility of measuring the distance to an extensive air shower using the fact that shorter wavelengths undergo more scattering than longer ones. In principle measuring the spectral distribution of light arriving at a detector provides information about the distance to the shower independent of its brightness or other features. Such measurements may also provide event-by- ... More
Presented by Dr. Thomas PAUL, Prof. John SWAIN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 172 (9A)
Cosmic ray fluctuations with the periods less than 3 h by data of the EPAM/LEMS120 aboard ACE spacecraft are studied. It is shown that the frequency spectra of cosmic rays undergo significant dynamic changes caused by the presence of fast magnetosonic waves in the solar wind. Evidences of generation of fast magnetosonic waves by the SEP fluxes have been found.
Presented by Dr. Sergey STARODUBTSEV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 170 (9A)
The Kiel Neutron Monitor has been measuring Cosmic Ray intensities for 50 years. Since an upgrade of the counting electronics in the mid 1990's in collaboration with the IZMIRAN group, measurements have been available with one minute resolution. However, these measurements are available only up to one hour after the measurement. We have now set up a second registration system that is running ... More
Presented by Dr. Christian T. STEIGIES on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 165 (8B)
Recurrent variations and their relation to the solar activity and solar wind parameters are investigated on the basis of the cosmic ray intensity data for 4 solar cycles by means of the spectral analysis method.
Presented by Dr. Sardaana GERASIMOVA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment flown on long duration balloons (LDB) in Antarctica to measure the energy spectra and composition of cosmic rays. The CREAM Science Flight Computer (SFC) system collects physics, calibration, pedestal and housekeeping event data from various instruments and transfers them to NASA/WFF’s Command and Data Module (CDM) fo ... More
Presented by Dr. Opher GANEL, Mr. Joonhyuk YOO
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 112 (6A)
The Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment designed for direct measurement of high energy cosmic rays with energy up to 10^15 eV. CREAM incorporates a sampling tungsten/scintillating-fiber calorimeter for energy measurements and a dual-layer Silicon Charge Detector (SCD) and Timing-based Charge Detector (TCD) to measure the charge of incident particles. CREA ... More
Presented by N.H. PARK on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 100 (5B)
The Advanced Thin Ionization Calorimeter (ATIC) long duration balloon experiment had a successful science flight accumulating 18 days of data (12/02 - 1/03) during a single circumnavigation in Antarctica. ATIC measures the energy spectra of elements from H to Fe in primary cosmic rays using a fully active Bismuth Germanate calorimeter preceded by a carbon target, with embedded scintillat ... More
Presented by Prof. John WEFEL on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 141 (7B)
The Alpha Magnetic Spectrometer (AMS) experiment to be installed on the International Space Station (ISS) will be equipped with a proximity focusing Ring Imaging Cherenkov (RICH) detector for measuring the charge and velocity of incoming cosmic-ray nuclei. From top to bottom, the detector consists of a radiator plane made of 1.05 aerogel and sodium fluoride (NaF) materials, an expansion volu ... More
Presented by Dr. A. MALININ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 142 (7B)
We give an update on the most recent design of the "School Cosmic Ray Outreach Detector'' (SCROD) using pixellated Geiger-mode avalanche photodiodes and scintillating tiles with wavelength shifting fibers as detectors. This technology offers very high levels of robustness at low cost. Voltages and currents are also so low as to reduce shock hazard to zero, and there are no fragile glass or ... More
Presented by Prof. John SWAIN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.2
SMESE is a Franco-Chinese microsatellite mission. Its scientific objectives are the study of both coronal mass ejections and flares simultaneously at the next solar maximum. The payloads include three packages: LYOT, DESIR, and HEBS. LYOT is composed of a Lyman-alpha coronagraph plus a Lyman-alpha disk imager. DESIR is a far infrared telescope working at two frequencies. HEBS is a high e ... More
Presented by Dr. Weiqun GAN
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 161 (8B)
Abstract Galactic cosmic rays are modulated through their propagation in the heliosphere by the effect of the large scale structure of the interplanetary medium. A comparison of the variations of the cosmic neutron monitor intensity with variation of geomagnetic disturbance Dst, solar wind velocity (V), interplanetary magnetic field (B), their product (VxB) near the Earth for the period 1 ... More
Presented by Dr. SHARAD TIWARI
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.4
This investigation is a continuation of the statistic analysis of the Solar Proton Event Catalogue. We studied spectra of proton growing/increases, which are indentificated with the logarithm of the particle fluxes ratio above the 100 and 10 MeV, i.e. with value of $\delta = \lg (F_{100} / F_{10} )$, for 172 powerful events when conditions for particles to leave the corona and to propagate in ... More
Presented by Dr. Alexei OSOKIN
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
We use data of neutron monitors and ground meson telescopes to study the daily temporal changes of the rigidity spectrum of the sporadic and recurrent Forbush effects of the galactic cosmic ray intensity. We show that the change of the exponent of the rigidity spectrum of the galactic cosmic ray intensity is generally related with the alternation of the level of the interplanetary magnet ... More
Presented by Mrs. Anna WAWRZYŃCZAK-SZABAN
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1 Board #: 171 (9A)
Two major Forbush Derease events were recorded –one on 15 May and other on 9 November 2005, of magnitudes 18% and 12% respectively. We have taken the data for cosmic ray intensity from Neutron Monitor stations at Oulu and Mawson,Antartica.In the present paper an analysis of the relation of FDs to the sources and different parameters of the interplanetary medium and geospace is studied. ... More
Presented by Dr. M.L CHAUHAN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A
One of the leading candidate sources of ultrahigh energy cosmic rays are BL-Lacertae (BL-Lac) objects. These are thought to represent Active Galactic Nuclei (AGN) whose jets are aligned with the line-of-sight toward the Earth. Previous experiments have reported small cross-correlation signals with BL-Lac objects with nominal chance probabilities in the 10^-3 - 10^-4 range. None of these res ... More
Presented by Prof. Charles JUI
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 061 (3B)
The Pierre Auger Observatory, with an array of currently more than a thousand Cherenkov detectors filled with 12 m^3 of water, can detect the putative high energy emission of a GRB (photons down to a few hundreds of MeV) by the so-called "single particle technique", through a coherent increase in the average background particle rates over the whole array, due to secondary particles in the phot ... More
Presented by Dr. Xavier BERTOU on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 063 (3B)
The AGASA collaboration has presented results that indicate the presence of large-scale anisotropy in the arrival direction of ultra-high-energy cosmic rays. While this data has been interpreted as an enhancement from the Galactic Center and the Cygnus region and a deficit from the Galactic anti-Center their map indicates a possibly much larger affect. Independent of the AGASA data, the ... More
Presented by Dr. Petra HUENTEMEYER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 049 (3A)
The KASCADE-Grande experiment, located on site of the Forschungszentrum Karlsruhe in Germany, is a multi-detector setup for measuring extensive air showers of primary energies up to 1 EeV. The main component for measuring showers of the highest energies is the newly added Grande array, which consists of 37 scintillation detector stations, spanning an area of nearly 0.5km². Based on the recon ... More
Presented by Dr. Andreas HAUNGS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 060 (3B)
The data collected by the Pierre Auger Observatory are analyzed to search for correlations between the arrival directions of high-energy cosmic rays and the positions in the sky of astrophysical transients. Special attention is directed towards gamma-ray observations recorded by NASA's Swift mission, which have an angular resolution similar to that of the Auger surface detectors.
Presented by Prof. Luis ANCHORDOQUI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.1 Board #: 093 (5A)
The secondary electron flux at altitude below 10 g/cm^2 is estimated using the result of atmospheric gamma ray spectrum above 30GeV, which has been obtained by our emulsion chamber experiments at balloon altitudes. We have to subtract these electrons produced by nuclear interactions from the observed electrons, when deriving the primary electron spectrum in the Galaxy. In addition, for ... More
Presented by Dr. yoshiko KOMORI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 027 (2A)
The water Cherenkov tanks of the Pierre Auger Observatory can detect particles at all zenith angles and are therefore well suited for the study of inclined and horizontal air showers (60° < theta < 90°). Such showers are characterised by a dominance of the muonic component at ground, and by a very elongated and asymmetrical footprint which can even exhibit a lobular structure due to the ben ... More
Presented by Dr. David NEWTON on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 054 (3B)
The primary proton spectrum up to 100 TeV has been investigated by balloon- and satellite-borne instruments. Above this energy range only ground-based air shower arrays can measure the cosmic ray spectrum with a technique moderately sensitive to nuclear composition. An array which exploits the full coverage approach at very high altitude can achieve an energy threshold well below the TeV reg ... More
Presented by Dr. Giuseppe DI SCIASCIO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 041 (2B)
The identification of the primary particle type can provide important clues about the origin of ultra-high energy (UHE) cosmic rays above $10^{18}$ eV. The depth of shower maximum of the air shower profile offers a good discrimination between different primaries. This observable, which was recently used to obtain a limit to photons from data taken by the Pierre Auger Observatory, is usually e ... More
Presented by Dr. Markus RISSE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.2 Board #: 169 (9A)
Results of the computations of the response of the scintillator detector to high energy photons using the code GEANT-3 is presented. The dependence of efficiency on energy is obtained for a given geometry of the detector and for different angular distributions of incident flux. The expectations of the response in wide energy channels for various primary energy spectra is obtained. The e ... More
Presented by Prof. Karel KUDELA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
In the present study almost all the magnetic clouds events occurred during the prescribed events 1996 – 2005 which covers whole period of solar cycle 23 have been taken into account. The selected storm events have been compiled and their various characteristics features as well as seasonal and solar cycle dependence have been discussed. We have extended our analysis to Cosmic Rays al ... More
Presented by Mr. Sujeet Kumar MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
Geomagnetic storms (Dst -150nT ≥) and Forbush decrease (Fd magnitude ≥ 5%) in cosmic ray intensity have been selected to study the solar source origin for producing these disturbances. It is found that out of 30 geomagnetic storms, 93% are associated with halo/partial halo coronal mass ejections (CMEs) and 60% with major solar flares whereas, out of 25 FD events, 92% are associated w ... More
Presented by Mr. B.N. MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 012 (1B)
The lateral distribution funtion (LDF) of charged particles is a basic characteristics of extensive air showers (EAS). It is necessary for determination of total number of particles at observation level and this number is used as an estima of primary energy. We consider the experimental LDF's obtained with MSU, Yakutsk and AGASA arrays. It should be noted that scintillator detectors of ... More
Presented by Mr. Jorge COTZOMI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
NOAA satellites and the orbiting Solar and Heliospheric observatory (SOHO) recorded one of the most powerful solar flares of the previous solar cycle 23 on 14 July 2000. This intense X 5 –class flare was erupted from sunspot region 9077 at 1024 UT. Simultaneously the coronagraph on board the SOHO recorded a ‘full-halo’ coronal mass ejection (CME) aimed toward the Earth. As CME’s are gi ... More
Presented by Ms. Sonia SHARMA
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3
We study the linear stability of a cosmic-ray-MHD system in the hydrodynamic approach. The system comprises four fluids: magnetized thermal plasma, cosmic rays, forward and backward propagating Alfven waves. The coupling between plasma, cosmic rays, and waves depends on the waves themselves. We perform short-wavelength linear stability analysis and find that the Alfven mode is not affect ... More
Presented by Prof. Chung-Ming KO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 072 (4A)
We describe a technique used to reconstruct the energy and Xmax of Ultra High Energy Cosmic Rays (UHECR) observed by the HiRes detector in stereoscopic mode. This technique calculates the relationship between the number of shower particles at a given depth of the shower to the signal in either angular or time bins. This relationship is calculated for a given shower segment location. The estim ... More
Presented by william HANLON on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 137 (7B)
It is well accepted today that diffusive acceleration in shocks results to the cosmic ray spectrum formation. This is particularly true for non-relativistic shocks as there is a detailed theory covering a large range of their properties On the other hand, the properties of relativistic and highly relativistic shock waves, associated with supersonic plasma flows, are still under investigat ... More
Presented by Prof. Apostolos MASTICHIADIS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 026 (2A)
EAS hadron number spectrum has been measured at EAS array “Carpet-2” for hadrons with energy > 50 GeV. The spectrum can be described by a power law and exhibits a change in the integral spectral index from 1.8 to 3.1 at the number of hadrons equal to 30. The ratio of the number of muons with threshold energy 1 GeV to the number of hadrons has also been measured.
Presented by Dr. Dachir DZHAPPUEV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 164 (8B)
Presenter’s Name and affiliation : Mahendra Pratap Yadav Deptt. of Physics, Govt. Tilak P.G. College, Katni (M.P.), 483501, INDIA Title of Paper : Study of Halo, Partial Halo CMEs in association of intense geomagnetic storms. Mahendra Pratap Yadav Email : mp_yadav2005@yahoo.com Preferred presentation type : Oral/Poster Suggested session code - SH : 1.7 Ordered list of authors with ... More
Presented by Prof. mahendera PRATAP
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
Scientifically we are living in very exciting times. The last three decades have proved to be very fruitful for the study of the solar-terrestrial environment including the geo-space, as well as for the interior of Earth. To analyse the geomagnetic activity associated with the structure present solar wind plasma and other interplanetary disturbance have used all the available solar inter ... More
Presented by Mr. Sujeet Kumar MISHRA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A
ARGO-YBJ is a full-coverage Extensive Air Shower array, located at 4300 m above sea level and made up of a carpet of Resistive Plate Counters. The time-space pattern allows a detailed reconstruction of showers induced by gamma and charged primaries. Thanks to its high duty-cycle the ARGO-YBJ detector can monitor for long periods the flux of cosmic rays in the energy range form 1 TeV up to 1 Pe ... More
Presented by Dr. Daniele MARTELLO
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 089 (5A)
The balloon-borne Cosmic Ray Electron Synchrotron Telescope (CREST) experiment will measure the flux of cosmic ray electrons at energies greater than 2 TeV by detecting the x-ray component of the synchrotron radiation emitted as the electrons traverse the Earth’s magnetic field. This method enhances the instrument acceptance to several times its geometric area. A Monte Carlo simulatio ... More
Presented by Scott NUTTER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 108 (6A)
A new study of the cosmic ray electron and synchrotron spectra is presented. Anomalous diffusion model, proposed in our recent papers, is used to describe the particles propagation in fractal-like interstellar medium. The parameters defining the anomalous diffusion have been determined from the analysis of nuclear component. We carry out calculation of the synchrotron spectrum in the frequency ... More
Presented by Dr. V BUGAYOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B
we present results of a simulation study on the expected performance of the TA/TALE detector. In particular we look at the anticipated gains in aperture below 10^18.5 eV which would result from the addition of the TALE detector to TA. We calculate the aperture at shower energies from 10^17 up to 3x10^20 for various detector combinations and observation modes: mono, stereo, hybrid-mono, and ... More
Presented by Dr. Tareq ABUZAYYAD
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3
The continuously changing interplanetary plasma and field values are known to produce geomagnetic field disturbances. Various investigators have used solar wind and interplanetary magnetic field parameters to established relationships between them. Yearly studies had established the relative role of solar wind as well as the magnitude of the interplanetary magnetic field, which is generat ... More
Presented by Dr. ANIL KUMAR TIWARI
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 090 (5A)
The balloon-borne Cosmic Ray Electron Synchrotron Telescope (CREST) experiment will employ a novel distributed electronics system to collect timing and pulse height information from 1024 BaF2 crystal detectors and 42 PMTs in its anticoincidence shield. The timing of single photoelectron triggers from the PMTs in the crystal array is recorded to an accuracy of 1 ns least count. Wide d ... More
Presented by G. TARLE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.2 Board #: 193 (10A)
The time profiles and energy spectra of 20.01.2005 (class X7.1), 17.01.2005 (class X3.8) and 15.01.2005 (class X2.6) solar flares from NOAA 00720 active region in energy band 0.1-20 MeV by AVS-F data are discussed. The energy spectra of 17.01.2005 and 20.01.2005 solar flares contain nuclear lines, positron line and neutrons capture line. Only positron line and neutron capture line in the ... More
Presented by Dr. Leonty MIROSHNICHENKO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
We have used Simple Denoising Algorithm using Wavelet Transform on the daily Forbush decrease data from the year 1967 to 2003. For this data we observe periodicity around 5-6, 11, 13, 15 and 24 years. For all the obtained peaks corresponding confidence levels are higher than 95%. We observe that the periodicity of around 5-6 years is common to solar flare data, major proton event data and ... More
Presented by Dr. KOUSHIK GHOSH
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.B Board #: 014 (1B)
An algorithm has been derived from simulations above 10**19 eV to amend the conversion of the densities measured at a given zenith angle to the energy estimators (for instance, densities at 600m for AGASA for the corresponding vertical shower). Above 5.10**19 eV, as the shower vertical maximum depth is close to the experimental plane, a complex situation happens for the "absorption"; for ... More
Presented by Prof. JEAN-NOEL CAPDEVIELLE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 091 (5A)
Recent advances in the development of silicon photodetectors working in the Geiger mode (SiPM), open new perspectives in space-based or balloon-borne calorimetry. However, present SiPM devices suffer from a number of limitations, including the instrinsic dynamic range of the photodetector and its operational stability, that have to be overcome in view of their utilization in ionization calorim ... More
Presented by Prof. Pier Simone MARROCCHESI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 039 (2B)
The Muon Tracking Detector in the KASCADE-Grande experiment allows the measurement of muon directions up to 700 m from the shower center. It means, that nearly all muons produced in a shower and surviving to the ground level are subject of investigation. It is important not only for studying mean muon production heights but, even more, for investigations of EAS muon pseudorapidity distribut ... More
Presented by Dr. Paul DOLL on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 139 (7B)
The AMS detector, to be installed on the International Space Station, includes a Ring Imaging Cerenkov detector with two different radiators, silica aerogel (n=1.05) and sodium fluoride (n=1.334). This detector is designed to provide very precise measurements of velocity and electric charge in a wide range of cosmic nuclei energies and atomic numbers. The detector geometry, in particular th ... More
Presented by F. BARAO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 029 (2A)
Absolute calibration of the Pierre Auger Observatory fluorescence detectors uses a 375 nm light source at the telescope aperture. This end-to-end technique accounts for the combined effects of all detector components in a single measurement. The relative response has been measured at wavelengths of 320, 337, 355, 380 and 405 nm, defining a spectral response curve which has been normalised to ... More
Presented by Mr. Robert KNAPIK on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 107 (6A)
the world's data on the anisotrpy of arrival directions of cosmic rays with energies less than and about 10^14 eV were extracted and its correlation with the properties of various parameters of LISM such as column density of neutral Hydrogen, Brightest stars and relative velocities of the local stars, less than 10 pc from the Sun were studied and some conlusions were drawn.
Presented by Prof. S.Jalil Aldin FATEMI
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 147 (7B)
The PoGOLite balloon-borne experiment applies well-type phoswich detector technology to measurements of soft gamma-ray polarization in the 25 - 100 keV energy range. The polarization is determined using Compton scattering and photoelectric absorption in an array of 217 plastic scintillators. This sensitive volume is surrounded by a segmented Bismuth Germanium Oxide (BGO) anticoincidence ... More
Presented by Ms. Cecilia MARINI-BETTOLO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 017 (1B)
The Cosmic Ray Observatory Project (CROP) is a statewide education and research experiment involving Nebraska high school students, teachers, and university undergraduates in the study of extensive cosmic-ray air showers. A network of high school teams construct, install, and operate school-based detectors in coordination with University of Nebraska physics professors and graduate students. Th ... More
Presented by Prof. Gregory SNOW on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 085 (5A)
In this paper we are introducing a technique to show the variation of the 22Ne/20Ne ratio at different galactic locations and the dependence of this ratio on the distribution of massive stars in the galaxy. Most of the previously developed models focused on explaining the ratio variation between the galactic and solar 22Ne/20Ne but never pointed out to the possibility of variation of the ... More
Presented by Dr. Ashraf FARAHAT on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.3 Board #: 201 (10B)
The Mexican Array Radio Telescope (MEXART) consists of a 64x64 (4096) full wavelength dipole antenna array, operating at 140 MHz, occupying 9,500 square meters (70 m x 140 m) to carry out interplanetary scintillation (IPS) observations. This is a dedicated radio array for IPS observations located in the state of Michoacan (350 km north-west from Mexico City, lat. 19$^$ 48' N, long. 101$^$ 41' ... More
Presented by Dr. Gonzalez-Esparza AMERICO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 003 (1A)
In the recent framework of 'microscopic' extension of the phenomenological black hole models (Ter-Kazarian, G.T. 2001, J. Phys. Soc. Jpn., Suppl., B 70, 84) we address the neutrino 'pre-radiation time' (PRT) of black holes. This implies the lapse of time from black hole's birth till radiation of an extremely high energy neutrinos. The 'microscopic theory' of BHs explores the most i ... More
Presented by Prof. Gagik TER-GHAZARYAN
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 094 (5A)
On 15-th June 2006 from Baikonur cosmodrom the satellite RESURS - DK1 was successfuly launched. The international team of researchers performs the scientific investigations of cosmic rays in a wide energy range with the spectrometer PAMELA on board of this satellite. The neutron detector is a part of the PAMELA spectrometer. It’s task is to separate the cascades of hadron and lepton origin. ... More
Presented by Prof. Yuri STOZHKOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7
Absract In this paper an algorithm was introduced to use the ground cosmic ray data in prediction significant geomagnetic storm. The muon measurement data from Nagoya station, Japan, was employed and the characters of cosmic ray evolvement before geomagnetic storm were revealed by analyzing the difference between the data advancing the geomagnetic storm and the quiet days. It was found ... More
Presented by Mr. Bingsen XUE
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 150 (8A)
PAMELA is a satellite-borne experiment designed to study the charged component of the cosmic radiation of galactic, solar and trapped nature. The main scientific objective is the study of the antimatter component of cosmic rays over a wide range of energies. PAMELA is mounted on the Resurs DK1 satellite that was launched on June 15th 2006 and is orbiting the Earth on a semipolar (70°) ellipt ... More
Presented by Dr. Silvio ORSI on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 121 (6B)
In distinguishing between the atmospheric Cerenkov light initiated by the primary cosmic ray and its associated air shower, the Track Imaging Cerenkov Experiment (TrICE) is devised to measure the composition of cosmic rays at TeV-PeV energies. The instrument is a fixed-mount zenith telescope that uses a fresnel lens as a early trigger and 4m focal length spherical mirrors to produce the image ... More
Presented by Ms. Stephanie WISSEL on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2 Board #: 120 (6B)
We have determined the cosmic ray source abundances of the isotopes of sulfur, argon, and calcium using data from the Cosmic Ray Isotope Spectrometer (CRIS) aboard the ACE spacecraft. We compare the source abundances derived in this work, employing a leaky-box model, with those calculated using the GALPROP cosmic ray propagation code. Cosmic rays are thought to originate in the cores of super ... More
Presented by Dr. R.C. OGLIORE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 105 (5B)
A time-of-flight scintillator system (TOF) has been developed for the PAMELA satellite-borne cosmic ray experiment, mounted on the Resurs DK1 satellite and launched from the Baikonur cosmodrome on June 15th 2006. PAMELA was built to measure charged particles in the cosmic radiation with a particular focus on antiparticles. The TOF scintillator system provides the fast trigger to the experimen ... More
Presented by Dr. Wolfgang MENN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5 Board #: 146 (7B)
The Detector is aimed to perform long-term measurements of neutral and charged particle fluxes at mountain level. Very fast EM/H calorimeter combined with fast EAS detectors allows precise particle arrival time registration with about 5 ns accuracy. Offline analysis gives a possibility to investigate time shift between high energy neutral/charged particle and EAS particles. Together wit ... More
Presented by Dr. George BASHINDZHAGYAN
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 013 (1B)
The arrival time distribution of EAS has been observed by using Ultra Fast Ce renkov detectors(UFC)and new Fast Scintillation(FS) dete ... More
Presented by Masaaki FUKUOKA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 007 (1A)
Experiments with the new generation of neutron detectors --- the boron-containing scintillators placed inside a standard NM64 type neutron supermonitor --- have shown, that the peculiar high-multiplicity neutron events with anomalously prolonged temporal distributions of neutron intensity, which have been observed earlier in a set of neutron monitor installations, are connected with an ... More
Presented by A.L. SHEPETOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.3 Board #: 151 (8A)
We use two complementary models, diffusion and explicit particle propagation, to analyze the end of the Galactic cosmic ray spectrum and its mixing with the extragalactic cosmic ray flux. The extragalactic cosmic ray flux is estimated by comparing Fly´s Eye, HiRes and AGASA spectra with Galactic spectrum expectations for different injection models, populations of Galactic accelerators and mag ... More
Presented by Cinzia DE DONATO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.2.A Board #: 051 (3A)
Measurements, obtained by the muon magnet-spectrographs (mdm~500 GeV/c) of NBU air shower array, representing lateral structure of low and high- energy muons in extensive air shower (EAS) with sizes ranging from 10^4.6 to 10^6.4 particles at sea level are studied to investigate its potential significance in understanding the primary composition and the development of EAS in the atmosphere ... More
Presented by Dr. Rabin CHHETRI
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.2
We review models for the origin of high energy cosmic-ray (CR) electrons. We consider nearby supernova remnants and pulsars, with burst-like and/or continuous injection, the contribution from distant homogeneously distributed sources, and production by CR interactions in the interstellar medium. The Large Area Telescope (LAT) will be capable of determining the electromagnetic spectrum with hi ... More
Presented by Dr. Troy PORTER
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.5
In large solar energetic particle (SEP) event, the acceleration source of relativistic particles remains enigmatic. The main controversy focuses on acceleration occurring at shock driven by coronal mass ejections (CMEs) or in the active region producing flares. The ground level enhancement (GLE) event of 2006 December 13 offers excellent opportunity to extend our knowledge about the acce ... More
Presented by Mr. Chuan LI
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.1
Forbush decreases (Fds) are transient and rapid decreases in cosmic ray intensity .Such decreases are followed by a slow recovery, typically lasting for several days. A systematic study has been done to derive the relationship between magnitude of Fds and solar wind velocity, temperature ad density for the period of solar cycle 22 and most of the interval of solar cycle 23. Interplanetar ... More
Presented by Dr. Pankaj Kumar SHRIVASTAVA
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 044 (3A)
The Pierre Auger Observatory is sensitive to ultra-high energy neutrinos in the EeV range and above. In this work we discuss in detail the complete chain allowing its acceptance to them to be computed. The probability that an ultra-high energy neutrino produces an Extended Air Shower is first computed. Then the simulations to get the detector response to those showers are presented. Finally ... More
Presented by Dr. Jaime ALVAREZ-MUNIZ on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 008 (1A)
Detector of a new type - the thick neutron calorimeter for the study of the muon-induced neutron events - was created in the underground room of the Tien-Shan mountain station (3340 m above the sea level) under a 2000 g/cm^2 thick rock absorber. Installation consists of the two separate parts: the "vertical" calorimeter with 152 "Helium-2" type neutron counters being placed above each other ... More
Presented by A.P. CHUBENKO
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B Board #: 010 (1A)
The energy spectrum of ultra-high energy cosmic rays (UHECR) is usually calculated for sources with identical properties. Assuming that all sources can accelerate UHECR protons to the same extremely high maximal energy E_max > 10^{20} eV and have the steeply falling injection spectrum 1/E^{2.7}, one can reproduce the measured cosmic ray flux above E > 10^{18} eV. We show that relaxing th ... More
Presented by Dr. Dmitri SEMIKOZ, Prof. Michael KACHELRIESS on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 006 (1A)
By the neutron monitor placed in the underground room of Tien-Shan mountain station is measured the spectrum of neutron multiplicities of the registered events. The spectrum has an approximately power shape with the differential slope index 3.7, its absolute intensity being 350-450 times lower than that of the events in the on-ground NM64 type neutron supermonitor. According to the late ... More
Presented by A.L. SHEPETOV on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.5
The Cosmic Ray Energetics And Mass (CREAM) calorimeter is designed to measure energies of cosmic-ray particles from ~10^11 eV to ~10^15 eV. The calorimeter is comprised of 20 tungsten plates, each 3.5 mm, or 1 radiation length thick, interleaved with 20 layers of 0.5 mm thick scintillating fiber ribbons. The scintillation light generated in the fiber ribbons when a cosmic-ray particle i ... More
Presented by Dr. Moo Hyun LEE
Type: Poster Session: Posters 1 + Coffee
Track: OG.1.4 Board #: 128 (7A)
We present results of simulations of the evolution of fully MHD plane shocks including diffusive acceleration of cosmic rays and their backreaction on the shock flow. From the computed particle phase space distributions we compute expected emissions resulting from interactions between the cosmic rays, the thermal particle populations and relevant astrophysical photon fields. The results will ... More
Presented by Prof. Thomas JONES
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 195 (10A)
Acceleration and propagation histories of suprathermal and energetic particles reaching a spacecraft at a given time depend on various factors. While acceleration at or near the Sun is often plausible in the inner heliosphere, other sources are known to contribute as well. The expected dispersion features for different energies are not always seen in flux increases. Dispersion of upstream part ... More
Presented by Péter KIRÁLY
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.B
We use a public available library of extensive air showers simulated without thinning for the realistic setup of Telescope Array experiment (TA) to outline the distributions of observables available at ground array part of TA. These distributions are analysed to estimate the size of physical fluctuations which allows to choose the observables most sensitive to energy and chemical compositio ... More
Presented by Dr. Dmitry GORBUNOV
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 174 (9A)
The assumption that the first arriving particles in impulsive solar energetic particle (SEP) events travel scatter-free along regular Parker-spiral magnetic field lines from injection at the Sun to detection at 1 AU has led to the conclusion that impulsive SEPs are often injected well after a type III radio burst is observed at the Sun. If all the turbulent scales are taken into accou ... More
Presented by Stephen KAHLER on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 058 (3B)
Using all stations of LOFAR we are planning to explore the possibility of using Moon as a detector of ultra high energy (>10 21 eV) cosmic rays. The idea is to cover the whole visible lunar surface and to look for short pulses of Cherenkov radiation emitted by showers induced just below the surface of the Moon when the cosmic rays strike it. In the LOFAR station, a large number of digi ... More
Presented by Dr. Kalpana SINGH on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.3.A Board #: 053 (3B)
Inclined air showers are a particularly interesting target for observation with the radio technique. They are expected to be well detectable and allow analyses of angular correlations over a much broader range in geomagnetic angle than near-vertical events. We present an updated analysis of highly inclined (>50° zenith angle), high energy (>10^5 N_mu) air showers measured with KASCADE-G ... More
Presented by Dr. Tim HUEGE on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.3 Board #: 185 (9B)
The Yangbajing neutron monitor is suitable for observing solar neutrons in association with solar flares due to a location with an altitude of 4,300 m above sea level. Using data of the Yangbajing neutron monitor obtained during 1998 and 2001, we searched for solar neutrons from individual solar flares detected by BATSE and Yohkoh. No signal due to solar neutrons was found in coincidence wi ... More
Presented by Dr. HARUFUMI TSUCHIYA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.2 Board #: 192 (10A)
The twin observatories of the STEREO mission, launched on October 25, 2006, will perform comprehensive studies of Coronal Mass Ejections (CMEs) directed towards Earth from two vantage points which allow stereoscopic remote observations of CMEs and multi-point in-situ measurements of their interplanetary counterparts (ICMEs). The Solar Electron and Proton Telescope (SEPT), part of the IMPACT i ... More
Presented by Mr. Reinhold MÜLLER-MELLIN on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.6 Board #: 183 (9B)
Variations of cosmic ray (CR) rigidity spectrum during Forbush effect on 17 January and solar proton event on 20 January, 2005 (the beginning at 06:36 UT, solar coordinates N14W61) have been researched using the method of spectrographic global survey according to ground-based observations of cosmic ray intensity at the world-wide network of stations. In integrally analyzing ground-based ... More
Presented by Dr. Olga KRYAKUNOVA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.2.2
We study the cosmic ray density changes near the heliospheric current sheet, both above and below it during different polarity states of the heliospher (A<0 and A<0). We analyze the neutron monitor data from several locations on the earth, well distributed in latitude with a range of cut off rigidities. Method of superposed epoch analysis has been applied using sector boundary (current ... More
Presented by Dr. Badruddin --
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 040 (2B)
The vertical profile of air density at a given site varies considerably with time. Well understood seasonal differences are present, but sizeable effects on shorter time scales, like day to night or day to day variations, are also observed. In consequence, the Moliere radius changes, influencing the lateral distribution of particles in the air showers and therefore may influence the shower de ... More
Presented by Dr. Barbara WILCZYNSKA on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 189 (10A)
Coronal Mass Ejections (CMEs) are large, energetic expulsions of mass and magnetic fields from the Sun; they can significantly affect large volumes of the heliosphere and appear to be a kay cause of geomagnetic storms. The present study deals with the influence of full hallo CMEs, partial hallo CMEs and asymmetric hallo CMEs on cosmic ray intensity and interplanetary parameters during 20 ... More
Presented by Dr. SANTOSH KUMAR
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.7 Board #: 168 (8B)
The waiting time distribution of emissions in Coronal Mass Ejections (CMEs) with several emissions is examined. We define the waiting time () as the time interval between the commencement of an emission and the commencement of the next emission considered as parts of a unique CME. The distribution seems to follow a power-law.Two classes of CMEs several emissions are considered: “clo ... More
Presented by Dr. Adolfo MENDEZ BERHONDO on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.4.A Board #: 025 (2A)
The rate of events measured with the surface detector (SD) of the Pierre Auger Observatory is found to be modulated by the weather conditions. This effect, observed in different ranges of S(1000), the signal measured at 1000 m from the shower core, is due to the increasing amount of matter traversed by a shower as the ground pressure increases and to the inverse proportionality of the Mo ... More
on 4/7/2007 at 19:45
Type: Poster Session: Posters 1 + Coffee
Track: SH.1.3 Board #: 177 (9A)
In this paper we make an analysis of when relativistic neutrons escaped from the sun and where the relativistic neutrons in interplanetary space decayed into relativistic protons which were observed by several neutron monitors on the ground. The occurrence of relativistic neutrons seemly supports the conclusion obtained by Miroshnichenko et al. (2005) that relativistic solar protons (RSP ... More
Presented by Prof. Gui-Ming LE
Type: Poster Session: Posters 1 + Coffee
Track: HE.1.1.A Board #: 055 (3B)
Extensive air shower (EAS) observation has been performed by the compact and synchronized EAS arrays by LAAS experiments. The zenith angle distribution and atmospheric effects were examined in order to obtain EAS absorption coefficients in the air and the relation between them and spectral index. The atmospheric effects are going to be analyzed as function of local solar time in harmonic a ... More
Presented by Dr. Atsushi IYONO, Ms. Chisato NODA on 4/7/2007 at 19:45