Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
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
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250
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
The observation of trans-iron nuclei in galactic cosmic rays (Z30) 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
The muon component and its relation with shower age in the EAS initiated by primaries of knee region
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 --
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
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
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
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
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
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
