Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
Posters 3 + Coffee
Place
Location: Merida, Mexico
Room: Regency (Hyatt)
Date:
from 9 Jul 14:45 to 10 Jul 16:15
Description
OG 2.5-2.7; HE 2.1-2.5, 3.1, 3.3-3.5; SH 3.1-3.5, 4.1-4.3, 5.1-5.3
Contribution List
Displaying 228
contributions
out of
228
Recent discoveries in gamma ray astronomy at a few 100GeV provide many motivations
for extending our coverage of the gamma ray sky to higher energies, up to several
100TeV. After reviewing these motivations we will present simulation-based
considerations to drive the design of arrays of Atmospheric Cherenkov telescopes to
obtain relevant sensitivity from a few TeV to a few 100TeV.
Presented by Dr. Stephan LEBOHEC, Dr. Pierre COLIN
on
9/7/2007
at
19:45
2D Stochastic Monte Carlo to evaluate the modulation of GCR for inner and outer solar system
planets
We developed a 2D model Stochastic Montecarlo for Cosmic Rays propagation in the
Heliosphere.The model solves numerically the transport equation of particles in the
heliosphere, including major processes affecting the heliospheric particle transport:
diffusion, convection, adiabatic energy losses and drift of particles.
We evaluated the modulated flux at several distancies from the sun (i.e. a
... More
Presented by Dr. Davide GRANDI
We study the dependence of the exponent of the power law rigidity spectrum
of the galactic cosmic ray (GCR) intensity variations on the range of the GCR
particles rigidity using data of neutron monitors and ground meson telescopes.
We found that the rigidity spectrum of the GCR intensity variations is hard for
neutron monitors with the effective rigidities ~10-15GV and soft for neutron
m
... More
Presented by Dr. Krzysztof ISKRA, Prof. Michael ALANIA
on
9/7/2007
at
19:45
Geant4 is a Monte Carlo radiation transport toolkit of generalized application in
areas such as high-energy physics, nuclear physics, astroparticle physics, or medical
physics.
Geant4 provides an optical physics process category, allowing the simulation of the
production and propagation of light. Such capabilities are well tailored for the
simulation of optics systems namely in cosmic-rays e
... More
Presented by Dr. Bernardo TOMÉ
on
9/7/2007
at
19:45
Here we present the results of a harmonic analysis of the large scale
cosmic ray anisotropy as observed by the Milagro observatory. The Milagro
observatory is a water Cherenkov detector located in the Jemez mountains
outside of Los Alamos, New Mexico. With a high duty cycle
and large field-of-view, Milagro is an excellent instrument for measuring
this anisotropy with high sensitivity at TeV e
... More
Presented by Mr. Brian KOLTERMAN
on
9/7/2007
at
19:45
The application of fast real-time imaging and pattern recognition
to the imaging atmospheric Cherenkov technique has the potential to
improve the sensitivity and versatility of stereoscopic arrays.
The recently available fast FPGA technology with clock frequencies
of 400 MHz allows the rapid pattern recognition of air shower
Cherenkov light images from several telescopes for making a trigger
... More
Presented by Prof. Frank KRENNRICH
Milagro is a TeV gamma-ray detector that
utilizes a large water Cherenkov detector to observe extensive air
showers produced by high energy particles impacting the Earth's
atmosphere. Milagro's distinct advantage compared to other TeV
gamma-ray detectors is that it views a wide field (2 steradian
over-head sky) and it continuously operates (>90% live time). A new
background rejection techniq
... More
Presented by Dr. Aous ABDO
on
9/7/2007
at
19:45
A probability density method for VHE gamma-ray source analysis, applicable to both
stand alone IAC telescopes and stereoscopic arrays, is presented here. Developed
using simulations and Crab data for the Whipple 10m telescope, the technique covers
both two-dimensional image and spectral analyses, and background subtraction is
implemented either by a modified standard approach using cuts on Hil
... More
Presented by Ms. Alex SYSON
on
9/7/2007
at
19:45
Detection of radiopulses from moon's surface employing moon based as well
as earth based detectors was proposed about several decades back. Inspired
by this novel idea a good number of experimental groups have been continuing
such investigations. In this paper a moon based experimental set up for
receiving lunar radiopulses and then transmitting the same to earth based or
satellite base
... More
Presented by Ms. Kalpana ROY SINHA
on
9/7/2007
at
19:45
We have investigated a solar activity dependence
of a solar wind (SW) effect on cosmic ray intensity (CRI) variations.
The SW effect discussed here is not concerned with transient origins
such as Forbush decreases nor with known solar modulations.
The effect is represented by the regression coefficient
of CRI variations with SW velocities.
CRI data we used have been recorded by the neutron m
... More
Presented by Prof. Hiroshi KOJIMA
on
9/7/2007
at
19:45
For the design of an optical module for deep-sea cubic kilometre sized neutrino
telescopes it is important to optimise performance versus cost. In the
framework of the KM3NeT design study we have designed an optical module
consisting of a single glass pressure vessel and containing up to about 40 small
photomultiplier tubes 40 small photomultiplier tubes including their high-voltage
supp
... More
Presented by Prof. PAUL KOOIJMAN
on
9/7/2007
at
19:45
In the standard model of cosmic structure formation, dark matter haloes form by
gravitational instability. The process is hierarchical: smaller systems collapse
earlier, and later merge to form larger halos. The probability that a halo of mass m
at redshift z will be part of a larger halo of mass M at the present time is
described by the progenitor (conditional) mass function f(m,z|M,0), accor
... More
Presented by Dr. Lidia PIERI
on
9/7/2007
at
19:45
Currently, the MAGIC telescope is the largest (17m) and most sensitive operating
Imaging Air Cherenkov Telescope. With an energy threshold of 50 GeV, MAGIC is capable
of constraining various high energy emission models of galactic and extra-galactic
sources by bridging the unexplored 10-100 GeV energy range. One of the main
experimental challenges to ground-based gamma-ray astronomy is the dis
... More
Presented by Mr. Alvin LAILLE
The readout of optical modules for deep-sea kilometre sized neutrino
telescopes is challenging for many reasons. Power consumption of the
electronics placed at the bottom of the sea must be low, and the data have to
be transported to shore over distances up to possibly 100 km. We present a
novel readout system - developed in the framework of the KM3NeT design
study - where the data from
... More
Presented by Prof. PAUL KOOIJMAN
on
9/7/2007
at
19:45
The paper studies the possibility of measuring a "prompt" muon
signal by means of recording multiple interactions of muons.
The main problem on data treatment is the reconstruction of the
interactions in a muon group which accompanies usually a high
energy muon. Results of data processing within the span of
4 years (live time = 22100 hours) are presented.
Presented by Dr. Yuriy NOVOSELTSEV
The propagation of relativistic strangelets in terrestrial atmosphere is
investigated. A model is proposed taking into account strangelets
fragmentation when colliding with air nuclei together with the successive
energy losses during penetration. New constraints on initial mass and energy
are yielded for arrival at various depths and the detection capabilities of high
altitude cosmic ray
... More
Presented by Fatma Zouleikha MOHAMMED SAHNOUN
Passage of cosmic rays in a resonant antenna generates mechanical vibrations,
originated by the local thermal expansion caused by the warming up due to the
energy lost by the particles crossing the material. The thermo-acoustic model
accounts for the amplitude of these vibrations, but recent measurements of the
high energy cosmic ray coincidences in the gravitational wave detector Nautilus
... More
Presented by Dr. Carlo LIGI
The ANTARES Collaboration is building a high energy neutrino telescope at 2500
m depth in the Mediterranean Sea. The experiment aims to search for high-
energy cosmic neutrinos through the detection of Cerenkov light induced by
muons and showers resulting from neutrino interactions with the surrounding
medium. The detector will consist of a three-dimensional array of 900 optical
modules h
... More
Presented by Dr. Yvonne BECHERINI
on
9/7/2007
at
19:45
Up to now, analyses of AMANDA data have been limited to searches for diffuse astrophysical sources, time-
integrated searches for point sources, and searches for flares and bursts from pre-selected sources (AGN and
GRB) over limited time-scales. On the other hand, multi-wavelength studies have shown that emissions can
occur in exponential flares or bursts with strengths that can be much great
... More
Presented by Dr. Rodín PORRATA
on
9/7/2007
at
19:45
In the Super-Kamiokande Collaboration, they assert that the abnormality has
never found in the electron-like events as for the neutrino oscillation. We
examine the electron-like events in the Super-Kamiokande by the Computer
Numerical Experiment and discuss their behavior.
Presented by Prof. Eiichi KONISHI
We analyze the muon-like Events(single ring image ) in the Super-Kamiokande
(SK) by the Computer Numerical Experiment. Assuming the parameters of the
neutrino oscillation obtained by the SK which characterize the type of the
neutrino oscillation, we reproduce the zenith angle distribution of the muon-like
events and compare it with the real distribution obtained by the SK . Also, we
car
... More
Presented by Prof. Eiichi KONISHI
on
9/7/2007
at
19:45
VERITAS employs a 12m segmented mirror and pixellated photomultiplier
tube camera to detect the brief pulse of Cherenkov radiation produced
by the extensive air shower initiated by a cosmic high-energy gamma
ray. The VERITAS data acquisition system consists of a 500
Mega-Sample-Per-Second custom-built flash ADC system, which samples
the Cherenkov light pulse every 2 nanoseconds. The integrate
... More
Presented by Dr. Peter COGAN
on
9/7/2007
at
19:45
The GRAPES-3 experiment observes extensive air showers using a high-density array of
scintillators and a large area tracking muon detector. The array consists of 300
scintillation detectors (each 1m^2 in area) and 16 modules of muon detectors having a
total area of 560m^2. Good angular resolution of the array is a key requirement for
detection of point sources of gamma rays. For this purpose w
... More
Presented by Mr. Akitoshi OSHIMA
on
9/7/2007
at
19:45
The striking alignment effect detected earlier in gamma-hadron stratospheric
STRANA superfamily is supplemented here by analysis of the arrangement of
all particles in the central area of the family. It showed the evident anisotropy in
the lateral distribution of these particles confirming a coplanar scatter effect in
the interaction.
Presented by Dr. Vladislav OSEDLO
on
9/7/2007
at
19:45
The compression ratio of the solar wind termination shock (TS) is an important
parameter when studying the modulation of the anomalous component in the
vicinity of the TS. An aspect that has been mainly overlooked is the inclusion of
the latitude dependence of the compression ratio in modulation models. We
present a theoretical study of the modulation effects of the latitude
dependence o
... More
Presented by Prof. Marius POTGIETER
The atmosphere is a vital component of the detector in an atmospheric Cherenkov telescope. In order to
understand observations from these instruments and reduce systematic uncertainties and biases in their
data it is important to correctly model the atmosphere in simulations of the extensive air showers they
detect. The Very High Energy Telescope Array (VERITAS) is a system of 4 such telesco
... More
Presented by Dr. Michael DANIEL
on
9/7/2007
at
19:45
We will talk about slow control system of Ashra (All-sky Survey High Resolution Air-shower detector) experiment. As
the name shows, it is an experiment observing fluorescence and Cherenkov light yielded by cosmic rays, which has
very wide FOV (80% of 2 pi str) and a few arc-min optical resolution. In addition to cosmic ray detection, it is able to
observe star (especially transient objects
... More
Presented by Mr. Akira OKUMURA
on
9/7/2007
at
19:45
The mirror facets on the VERITAS telescopes, which are of
Davies-Cotton design, are aligned with the telescope axis in
the horizontal position using a laser projector at the radius
of curvature. The instrument used will be described. The
mechanical design of the Optical Support Structure permits some
gravitational slumping with elevation which can be counteracted by
bias alignment (deliberat
... More
Presented by J. TONER
on
9/7/2007
at
19:45
We have proposed the CALET(CALorimetric Electron Telescope)
mission to observe galactic electrons and gamma rays on ISS/JEM.
In this paper we present the measurements of long-term and
short-term variations of electron intensities in the helisphere.
Galactic electrons of 1-100GeV energy range mostly have negative charges
and the spectrum largely varies with solar activities. Thus we
exp
... More
Presented by Dr. yoshiko KOMORI
on
9/7/2007
at
19:45
A comparative study of tri-diurnal anisotropy of Cosmic Ray intensity data has
been performed for Deep River neutron monitoring station on geo magnetically
60 quietest days, 120 quiet days and all days during 1992-94. Histographic
plots of percentage of occurrence of days for Phase (hrs) in a definite interval
reveals that Phase is maximum in the interval of 0 to 2 hrs directions during t
... More
Presented by Mr. Mahendra RICHHARIA
on
9/7/2007
at
19:45
Systematic correlative studies have been performed since long to establish a
significant relationship between cosmic ray intensity and different
solar/heliospheric activity parameters and study is extended to recent solar
cycle 23. In the present work yearly average of sunspot number (Rz),
interplanetary magnetic field (B) have been used to correlate with yearly
average cosmic ray intens
... More
Presented by Dr. SUDHIR KUMAR SHRIVASTAVA
Utilizing the Gaisser parameterization of the differential vertical muon intensity
and propagating the spectrum underground according to the statistical ionization and
radiative muon energy losses, it is possible to calculate the underground muon
intensity Crouch curve. In addition it is feasible to refine the spectral index of
the Gaisser parameterization by minimizing the deviation from the
... More
Presented by Dr. Jeffrey DE JONG
on
9/7/2007
at
19:45
We calculate the cosmic ray muon flux at ground level using the model
of primary cosmic ray spectra suggested by Zatsepin and Sokolskaya.
The model supposes contributions to the cosmic ray flux of three classes
of sources - the shocks from exploding stars, nova and supernova of
different types. The model is supported by the new data obtained in the
ATIC-2 balloon experiment. Present
... More
Presented by Alexander PANOV
on
9/7/2007
at
19:45
The balloon-borne ANITA neutrino telescope successfully launched
from McMurdo Station, Antarctica during the 2006-2007 austral summer.
In this paper we present ongoing studies of the energy resolution and
system response of the ANITA detector, which provide an excellent test
bed for validating the ANITA Monte Carlo, and will be of great interest if
ANITA discovers signal events. While
... More
Presented by D. GOLDSTEIN
on
9/7/2007
at
19:45
VERITAS is an array of four identical telescopes designed for detecting and measuring
astrophysical gamma rays with energies in excess of 100 GeV. Each telescope uses a 12
m diameter mirror to collect Cherenkov light from air showers initiated by the
incident gamma rays and direct it onto a `camera' comprising 499 photomultiplier
tubes (PMTs) read out by flash ADCs. We describe here calibratio
... More
Presented by Prof. David HANNA
on
9/7/2007
at
19:45
The time variation of the chaotic feature of the energy series of cosmic rays
shows a periodic behaviour with the rotation of the earth. The periods are
1.0day and 1.3day. The energy series of cosmic rays are evaluated by the
formula of Nishimura-Kamata-Greissen. The chaotic feature is found by the
correlation dimension analysis and Lyapnov exponent analysis. The periods
mean that the ch
... More
Presented by Dr. Soji OHARA
Solid state nuclear track detectors (SSNTD) are useful for studying heavy ion
abundances in cosmic rays at mountain altitudes because of their light weight
and certain Z/Beta detection thresholds which automatically eliminates low Z
background. In our work we are using a particular brand of overhead projector
(OHP) films which has a very high detection threshold of Z/Beta > 140 and so
ar
... More
Presented by Dr. Swapan K SAHA
Past works suggest the existence of several periodicities in comic ray data.
Nevertheless, the reliability of the obtained periods is not often faced.
In this paper, neutron monitor and IMP data were analysed by using the Fast
Fourier Transform and Wavelet techniques to determine the reliability of each
identified medium- and long-term periodicity. Moreover, their relevance is
analysed along
... More
Presented by Dr. Monica LAURENZA
on
9/7/2007
at
19:45
Following the terminology adopted by Supe-Kamiokande, Fully Contained
Events are observed in the electron-neutrino which result in the cascade
shower for high energy neutrino astrophysics project, such as NT200, AMANDA
etc., while muon-neutrino event re observed as Partially Contained Events. Fully
Contained Events are essentially only source by which we could extract the
reliable inform
... More
Presented by Prof. Akeo MISAKI
on
9/7/2007
at
19:45
The problem of identifying gamma ray events hidden in charged cosmic ray background
(so called
hadrons) in Cherenkov telescopes is one of the key problems in VHE gamma ray
astronomy. In this
contribution, we present a novel approach to this problem by implementing different
classifiers
relying on the information of each pixel of the camera of a Cherenkov telescope,
rather than using
Hilla
... More
Presented by Ms. Raquel DE LOS REYES
on
9/7/2007
at
19:45
Several candidate neutrino sources
manifest variable electromagnetic emission, often with burst-like behaviour.
It is interesting to consider that the neutrino emission from such sources
could have similar time character. In the context of the so called
multi-messenger approach, information from high energy neutrinos and
different electromagnetic wavelengths (e.g., high gamma-rays) is combine
... More
Presented by Dr. Elisa BERNARDINI
on
9/7/2007
at
19:45
Theoretical predictions for neutrino fluxes indicate that km3 scale detectors are
needed to detect certain astrophysical sources. The three Mediterranean
experiments, ANTARES, NEMO and NESTOR are working together on a design
study, KM3NeT, for a large deep-sea neutrino telescope. A detector placed in
the Mediterranean Sea will survey a large part of the Galactic disc, including the
Galac
... More
Presented by Mr. damien DORNIC
on
9/7/2007
at
19:45
An analysis of the solar magnetic field strength (B(nT)) was based on the
temporal evolution of the minimum (Bmin) values in relation to the maximum
(Bmax) values of the 300-year data series. Three results seem of particular
significance. A two-step cycling mode is exhibited by the absolute values of
Bmax and Bmin. The ratios of Br = (Bmax-Bmin)/(Bmax+Bmin) can be defined as
the dimen
... More
Presented by Dr. Gisela DRESCHHOFF
on
9/7/2007
at
19:45
Observations of cosmic-ray helium energy spectra provide important constraints on
cosmic ray origin and propagation. However, helium intensities measured at Earth are
affected by solar modulation, especially below several GeV/nucleon. Observations of
helium intensities over a solar cycle are important for understanding how solar
modulation affects galactic cosmic ray intensities and for sepa
... More
Presented by Dr. Georgia DE NOLFO
on
9/7/2007
at
19:45
The Maunder minimum (1745-1715) is a special period of extremely quiet Sun with
almost vanishing sunspots. On the other hand it is known from measurements of
cosmogenic isotope 14C in tree-rings that cosmic rays were cyclicly modulated during
that period, but with the dominant 22-year period. Using a numerical model including
the drift effect of the wavy heliospheric current sheet we simulate
... More
Presented by Dr. Usoskin ILYA
For energies less than ~3 GeV/n, the Cosmic Rays Antideuteron component due
to spallation becomes negligible for kinematic reasons and the detection of
even a single antideuteron would strongly suggest the existence of new
sources, like neutralino Dark Matter.
The AMS-02 experiment, on board of ISS for a long duration mission (3 years),
thanks to its large acceptance (~ 0.5 m2 sr) and it
... More
Presented by Dr. Francesca GIOVACCHINI
on
9/7/2007
at
19:45
One of the severe limitations in detecting neutrino signals from nuclear reactors
is that the copious cosmic ray background imposes the use of a time veto upon the
passage of the muons to reduce the number of fake signals due to muon-induced
spallation neutrons. For this reason neutrino detectors are usually located
underground, with a large overburden. However there are practical limitations
... More
Presented by Dr. Edgar CASIMIRO LINARES
on
9/7/2007
at
19:45
We report results of cosmic-ray muon flux measurements in the Belgrade low-
level laboratory (geographic latitude 44051'N, vertical geomagnetic rigidity
cut-off 5.3GV). Continuous measurements are performed from 2002 to 2006 at
ground level (78m a.s.l) and in the underground low-level laboratory
(25m.w.e). At the ground level the average muon flux is found to be 1.6(1) x
10-2 s-1cm-2 and
... More
Presented by Dr. PRODANOVIC
The Zero Degree Detector (ZDD) is a new instrument that has been used in
accelerator exposures to measure the angular dependence of secondary
particles produced in fragmentation experiments. The ZDD uses two identical
layers of pixelated silicon detectors that make coincident measurements over
the active area of the instrument. The angular distribution of secondary particle
produced in n
... More
Presented by Dr. Mark CHRISTL
on
9/7/2007
at
19:45
A Nemo tower prototype, composed of 4 floors, has been recently deployed off the
Sicily coast.
This contribution aims at explaining the concepts underlying the communication link
design
going over the whole data acquisition and transport from the front-end electronics,
with signal
digitization and transmission, to the module which gathers four front-end boards and
sends data on-shore
throu
... More
Presented by Dr. Fabrizio AMELI
Both, Super-Kamiokande-I and SNO have reported a day night asymmetry that, after
statistics and systematics are accounted for, is consistent with zero. Nevertheless,
the Kamiokande values of 2.1% is sizable and, at least in sign, consistent with
theoretical expectations. Taking into account in a simplified, yet realistic way the
internal structure of the Earth, we present new analytical and nu
... More
Presented by Dr. Daniel SUPANITSKY
on
9/7/2007
at
19:45
The unknown flux of prompt atmospheric neutrinos presents a challenging background to
searches for extra-terrestrial neutrinos in high-energy detectors. Uncertainties in this flux
will weaken the power of the detector to place constraints on other expected signals. A
new likelihood analysis, using the full information present in event arrival directions and
energy will be presented, which
... More
Presented by Gary HILL
on
9/7/2007
at
19:45
Recently, ground-based very high-energy gamma-ray astronomy achieved a remarkable
advancement in the development of the observational technique for the registration
and study of gamma-ray emission above 100 GeV. Construction of telescopes of
substantially larger size than the currently used 12 m class telescopes can
drastically improve the sensitivity of ground-based detectors for gamma rays o
... More
Presented by Dr. Alexander KONOPELKO
on
9/7/2007
at
19:45
Development of Gigahertz Analog Memory for Front-End Electronics of Imaging Air Cherenkov Telescopes
The night sky light is one of the major components of background for imaging air
Cherenkov telescopes. It disturbs images of air shower and makes both the
gamma/hadron separation and the angular resolution worse. For example, The
CANGAROO-III electronics consists of charge ADCs and multi-hit TDCs. In using charge
ADCs, we have to delay the signal from PMTs until the trigger signal input to ADC
... More
Presented by Mr. Taku MIZUKAMI
on
9/7/2007
at
19:45
There are small differences in both ionization energy loss and catastrophic
energy loss between positive and negative muons, which are usually neglected
in most Monte Carlo simulations. These small differences can be amplified when
measuring the charge ratio underground, where the total energy loss between
the surface and the measurement is significant. Calculations of these effects
fo
... More
Presented by Dr. Maury GOODMAN
on
9/7/2007
at
19:45
The lightest neutralino in SUSY models is a good candidate for dark matter of
the universe. In the large tan beta region of SUSY models, signals for direct and
indirect search experiments can be enhanced due to neutral Higgs exchange
diagrams. On the other hand, the same digram can affect Bs-->mu mu and may
violate the upper bound from Tevatron. I discuss the interplay of these
observabl
... More
Presented by Prof. Pyungwon KO
There are two types of high-speed solar wind streams classified in two
categories: coronal hole associated and flare generated streams. These two
types of streams are classified in two categories base on magnetic field and
solar wind plasma parameters. We studied the dependence of cosmic ray
depressions due to high-speed solar wind streams during low amplitude days.
Cosmic ray intensity
... More
Presented by Dr. REKHA AGARWAL MISHRA
Vela is the brightest pulsar known in the GeV gamma ray range, yielding a clear
signal in less than a day of observations with the Large Area Telescope (LAT). The
striking pulsed signature provides a rich opportunity to compare the real gamma ray
response of the GLAST LAT to expectations from the highly-detailed Monte Carlo
detector simulations. This is critical because all flux and spectral m
... More
Presented by Mr. Johann COHEN-TANUGI
The modulation in cosmic ray intensity is observed due to long-term and short-
term variation in solar activity. The concept of multi-parametric modulation of
CRI may play an important role in the study of long-term modulation of CRI.
Keeping in view the said idea/concept, we have tried to investigate the
combined effect of a set of two SA parameters in the long-term modulation of
CRI. Fo
... More
Presented by Dr. V.K MISHRA
Energy spectra of hadron cascade showers produced by the cosmic ray muons travelling
through water and the muon integral spectra underwater at the depth up to 4 km are
calculated with two models of muon inelastic scattering on nuclei, the recent hybrid
model (two-component, 2C) as well as the well-known generalized
vector-meson-dominance (GVMD) model for the comparison. The 2C model involv
... More
Presented by Prof. Akeo MISAKI
on
9/7/2007
at
19:45
The COSPIN/KET experiment on board the Ulysses spacecraft has been
observing the flux of 3-30 MeV and also higher energy electrons in the inner
heliosphere (radial distances > 5.2 AU) since its launch in 1990. These
observations have indicated the presence of low-energy electrons with a
strong anisotropy off the equatorial plane as far as 2.2 AU from Jupiter. This
was observed during Uly
... More
Presented by Prof. Marius POTGIETER
on
9/7/2007
at
19:45
We propose models which generalize the differential D(E) spectra of galactic
(GCR) and anomalous cosmic rays (ACR) during the 11-year solar cycle. The
models take into account the cosmic ray (CR) modulation in the Heliosphere. We
describe the connection between solar activity variation and the values of model
parameters. Our analyses show that the contribution of GCRs and ACRs to the
io
... More
Presented by Ms. Marusja BUCHVAROVA
In this contribution we discuss the possibility of using the observations by
GLAST of standard gamma sources, as the Crab Nebula or Vela and some
selected AGNs, to calibrate the Imaging Air Cherenkov detectors and improve
their energy resolution. Results of the calibration technique can possibly be
used to discriminate between VHE gamma-rays emitted by the Nebula and by
the inner pulsar
... More
Presented by Dr. Denis BASTIERI
on
9/7/2007
at
19:45
Extremely high energy (EHE) cosmic rays are expected to interact with cosmic
microwave photons and generate EHE neutrinos (>10PeV).
The IceCube telescope can detect the EHE neutrinos due to its large effective volume,
although the expected flux is much lower than the huge flux of atmospheric background
muons at lower energies. Therefore, reconstruction of the track geometry and
especially t
... More
Presented by Dr. David BOERSMA
on
9/7/2007
at
19:45
The IceCube neutrino observatory, currently under construction at the South Pole,
offers a novel environment to search for particles beyond the Standard Model. With
IceCube nearly 20% complete it is currently the largest neutrino telescope. The large
instrumented volume and relatively clear glacial ice allows for the improvement of
detection limits (in the absence of discovery) on many types o
... More
Presented by Dr. Alexander OLIVAS
on
9/7/2007
at
19:45
As described in a paper (S.Torii et al) of this conference, CALET is
a versatile detector for exploring high energy universe by observing
gamma rays (>20 MeV), electrons (>GeV) and other charged particles
(>100GeV). It is planned to be on board the JEM (Japanese
Experiment Module, Kibo) of the International Space Station. We
study its basic performance by M.C simulations.
Th
... More
Presented by Prof. katsuaki kasahara KASAHARA
on
9/7/2007
at
19:45
Several experimental works demonstrate the possibility of observation of shadows of
the Moon and the Sun for the mean energy of primaries higher than 1 TeV. Calculations
are presented to demonstrate the feasibility of Moon shadow observations for mean
primary energies in the region 0.5-1 TeV in a muon detector operating under the
Pyramid of the Sun at Teotihuacan, Mexico. Due to the relatively
... More
Presented by Dr. Varlen GRABSKI
on
9/7/2007
at
19:45
The South Pole Acoustic Test Setup (SPATS) has been built to evaluate the
acoustic characteristics of the Antarctic ice in the 10 to 100 kHz frequency range
so that the feasibility and specific design of an acoustic neutrino detection array
at South Pole can be evaluated. SPATS consists of three vertical strings that
have been deployed in the upper 400 meter of the Antarctic ice cap in Jan
... More
Presented by Ms. Freija DESCAMPS
on
9/7/2007
at
19:45
The production of charmed hadrons (D^{+}, D^{-}, D^{0}, \bar{D}^{0},
\Lambda_{c}^{+}, \bar{\Lambda}_{c}^{-}) in pp collision as a function of
\sqrt{s}, x_{F}, p_{\perp} and p_{\perp}^{2} have been studied in the
framework of the QGSJET model. The charmed hadrons are considered as the
potential sources of prompt lepton's fluxes in cosmic rays. So in this
context, the study of the charmed h
... More
Presented by Mr. Umananda DEV GOSWAMI
VERITAS is a new atmospheric Cherenkov imaging telescope array to detect
very high energy gamma rays above 100 GeV. The array is located in
southern Arizona, USA, at an altitude of 1270m above see level.
The array currently consists of four 12 m telescopes, structurally
resembling the Davis-Cotton design of the Whipple 10 m telescope.
The VERITAS focal plane instruments are equipped with
... More
Presented by Dr. Tomoyuki NAGAI
on
9/7/2007
at
19:45
High-energy gamma-ray sources are inherently nonthermal, multiwavelength objects.
With the launch of the Gamma-ray Large Area Space Telescope (GLAST) in late 2007, the
GLAST Large Area Telescope (LAT) Collaboration invites cooperative efforts from
observers at all wavelengths. Among the many topics where multiwavelength studies
will maximize the scientific understanding, three stand out. (1)
... More
Presented by Dr. Jennifer CARSON
on
9/7/2007
at
19:45
The Gamma ray Large Area Space Telescope (GLAST) is the next-generation
high energy gamma-ray astronomy mission, scheduled for launch in Fall
2007. The observatory comprises two instruments. The Large Area Telescope
(LAT) will survey the sky in the energy range from 20 MeV to >300 GeV,
while the GLAST Burst Monitor (GBM) will monitor gamma-ray bursts and
other transients in the 10 keV to 25 M
... More
Presented by Mr. JOHANN COHEN-TANUGI
on
9/7/2007
at
19:45
The spatial distribution of galactic cosmic rays in the heliosphere
at solar maximum of Cycles 21, 22 and 23 are studied using a one
dimensional model of the cosmic ray transport equation. We investigated
the radial intensity gradients from 1 AU to the distant heliosphere and
interpreted the data from IMP8, Voyagers 1/2, Pioneer 10 and balloon
experiment BESS. In our model we considered
... More
Presented by Oscar G. MORALES-OLIVARES
on
9/7/2007
at
19:45
We use a diffusive model for the propagation of Galactic cosmic rays to estimate the
charged meson production in interactions with protons of the interstellar medium.
Cosmic ray nuclei from proton to iron are considered and the corresponding
contribution to the neutrino secondary flux produced as a result of spallation is
also estimated. The contribution from nearby Galaxies to the all sky neu
... More
Presented by Cinzia DE DONATO
on
9/7/2007
at
19:45
GAW proposes a new approach for the detection and measurement of the Cherenkov light
produced by GeV/TeV gamma rays traversing the Earth atmosphere which imposes specific
requirements on the electronics design. The focal surface of the GAW telescope
consists of a matrix of multi-anode photomultipliers. The large number of active
channels (of the order of 104) makes it basically a large UV sens
... More
Presented by Pedro ASSIS
on
9/7/2007
at
19:45
We propose to provide a gamma-ray burst monitor (GBM) for the CALET mission to
monitor gamma-ray bursts (GRBs) simultaneously with the CALET main detector. The
major purpose is to derive a wide-band energy spectrum of GRB over an unprecedented 9
decades of energy (from a few keV to 10 TeV) in combination with the CALET tower
detector. Hence it is desirable to have the CALET-GBM covering an ene
... More
Presented by Dr. Kazutaka YAMAOKA
on
9/7/2007
at
19:45
Charged Cosmic Rays are a huge background in any IACT measurement.
Traditional data analysis methods involve variables that try to characterize the
shape of the shower 2D pattern at the IACT focal plane. The Hillas parameters
are, in this context, widely used.
In this contribution an innovative method based on 3D variables, the angles
and the distances (impact parameters) in space between
... More
Presented by Prof. Mario PIMENTA
on
9/7/2007
at
19:45
Imaging Air Cherenkov Telescopes (IACTs) detect the Cherenkov light flashes
of Extended Air Showers (EAS) triggered by VHE gamma-rays impinging on
the Earth's atmosphere. Due to the overwhelming background from hadron
induced EAS, the discrimination of the rare gamma-like events is rather
difficult, in particular at energies below 100 GeV. The influence of the
Geomagnetic Field (GF) on t
... More
Presented by Mr. S.C. COMMICHAU
on
9/7/2007
at
19:45
The High Altitude Water Cerenkov detector HAWC will be a powefull instrument to
survey the TeV sky. Mexico has proposed to locate this experiment in the Parque
Nacional Pico de Orizaba, between Citlaltepetl and Tliltepetl, host of the Large
Millimeter Telescope (LMT). The region has a sizeable technical infrastructure
related to the LMT and we recently studied a 4100m location in terms of i
... More
Presented by Dr. Alberto CARRAMINANA
on
9/7/2007
at
19:45
Perturbative QCD predicts that there should be a significant flux of
muons with high transverse momentum (p_T) produced in primary interactions
of high-energy cosmic-rays. These muons arise from the semileptonic decays
of heavy quarks, and from the decays of high p_T kaons and pions produced
in jets. These muons can be useful to study the cosmic-ray composition in
a pQCD framework.
... More
Presented by Dr. Spencer KLEIN
on
9/7/2007
at
19:45
We have developed a hybrid photo-detector (HPD) for the Ashra detector.
The HPD consists of a 6-inch electron tube and a multi-pixel silicon detector
followed by trigger decision ASIC circuits.
The advanced features of the silicon detector are as follows:
1. high resolution with 64 x 64 channels using bump bonding technique
2. high gain due to a thin dead layer and a large effective area
... More
Presented by Dr. Masataka MASUDA
on
9/7/2007
at
19:45
The long-term variation (modulation) of CR intensity is not exactly anti-parallel
to sunspot activity. In odd cycles, there is a large hysteresis loop (difference in
the evolution during the rising and falling phase of solar activity). In even
cycles, the loop is narrow. So far, only data for two odd cycles (cycle 19 and 21)
and two even cycles (20 and 22) were available and the above patt
... More
Presented by Dr. RAJARAM KANE
on
9/7/2007
at
19:45
Peculiarities in distribution of the Jovian electrons along the Earth's orbit based
on an extended set of observational data are investigated. It is shown that the
maximum in the electron intensity appears 243 days after the Earth-Jupiter
opposition. It corresponds to the IMF field time simultaneously covering the
Jupiter and the Earth. Through the charged particle flux the Jupiter forms 3
... More
Presented by Dr. Vladislav TIMOFEEV
on
9/7/2007
at
19:45
IceCube is a 1 km^3 neutrino observatory now being built at
the South Pole. In addition to its larger size, IceCube is also
designed to have smaller systematic errors than its AMANDA
predecessor. IceCube performance for showering ('cascade'-like)
events has been studied with LED and laser light sources.
The detector resolution for cascade position, energy and
direction has been studied
... More
Presented by Dr. Joanna KIRYLUK
on
9/7/2007
at
19:45
The calibration of the surface air shower array of IceCube - IceTop is based on
identifying and understanding the muon response of each IceTop tank. Special
calibration runs are carried out throughout the year and are supplemented with
austral season measurements with tagging telescope for vertical muons. The vertical
equivalent muon (VEM) charge value of each tank is determined and monitored
... More
Presented by Dr. Levent DEMIROERS
on
9/7/2007
at
19:45
Small air showers that trigger single or several IceTop stations usually have one or
several muons with energy high enough to reach the IceCube in-ice detector. In this work,
we first use the coincident events to calibrate the timing resolution between and
within the two detectors. Using muons tagged by IceTop single station triggers, which
usually contain a single high energy muon, we also cr
... More
Presented by Dr. Thomas GAISSER
on
9/7/2007
at
19:45
The Antarctic Impulsive Transient Antenna (ANITA) experiment may be the first
experiment to identify astrophysical neutrinos of energy greater than 10^18 eV
through the detection of radio Cherenkov pulses emitted by neutrino-induced particle
showers in the Antarctic ice. A Monte Carlo simulation has been developed to
determine the sensitivity and improve the event reconstruction capabilities o
... More
Presented by Brian MERCURIO
on
9/7/2007
at
19:45
In neutrino astronomy, glacial ice or deep ocean water are used as
detector media. Typically, neutrinos are recognized by distinguishing
charged particles generated in neutrino interactions from atmospheric
muons, using in situ detectors recording time distributions and fluxes of
faint photon fields of Cherenkov radiation.
The IceCube collaboration has developed an empirical model descri
... More
Presented by Mr. Johan LUNDBERG
on
9/7/2007
at
19:45
The Large Area Telescope (LAT) is one of the two instruments onboard the Gamma-ray
Large Area Space Telescope (GLAST), the next generation high-energy gamma-ray
telescope, to be launched in Fall of 2007. It is comprised of sixteen identical
towers in a four by four grid, each tower containing a silicon tracker and a CsI
calorimeter that together will give the incident direction of the pair-con
... More
Presented by Mrs. Claudia LAVALLEY
on
9/7/2007
at
19:45
Under the assumption the Neutralino as lightest supersymmetric particle
being the DM particle, studies of the evolution of Super Massive Black
Holes expected in the center of most galaxies predict the existance of
some 100-1000 Intermediate Mass Black Holes (IMBH) also in our galaxy
[Bertone et al. 2005].
Since IMBHs did not suffer major merging and barionic accretion, they can
have a very
... More
Presented by Dr. Michele DORO
on
9/7/2007
at
19:45
Data on the hourly means of cosmic ray density and anisotropy derived by the
GSM method over the 1957-2006 are introduced in to MySQL database. This
format allowed an access to data both in local and in the Internet.
Using the realized combination of script-language Php and My SQL database
the Internet project was created on the access for users data on the CR
anisotropy in different for
... More
Presented by Dr. Viktor YANKE, Mr. Aliaksandr ASIPENKA
on
9/7/2007
at
19:45
Ion acceleration and Alfven waves excitation at the interplanetary
shocks is studied within the quasilinear approach. Numerically calculated
spectra of ions and Alfven waves are compared with experimental data.
It is shown that calculations are well consistent with the existing measurements.
Presented by Prof. Evgeny BEREZHKO
on
9/7/2007
at
19:45
Ulysses, launched in October 1990, now is in its third out-of-ecliptic orbit. The
situation now is sharply distinct from that during the second orbit in maximum
of solar activity and reminds a situation during the first orbit when solar activity
was also low, but in contrast to the first orbit we are now in the heliosphere
with other polarity of the total solar magnetic field. The Kiel Ele
... More
Presented by Dr. Eugenia EROSHENKO
We study the propagation of energetic muons produced by ultra high energy
cosmic rays which could penetrate to the cavern of the CMS (Compact Muon
Solenoid) tracing detector. The present work is based on our previous
simulation proposed by Mahrous et al. [2005]. We have improved this model by
(1) eliminating the ambiguity via adding Landau-Pomeranchuk-Migdal effect to
the Monte Carlo cod
... More
Presented by Prof. Mohamed SHERIF
As a calibrated laser pulse propagates through the atmosphere, the Rayleigh scattered
light intensity arriving at the VERITAS telescopes can be calculated precisely when
atmospheric conditions are good. This technique is originally developed for the
absolute calibration of ultra high energy cosmic ray fluorescence telescopes but is
also applicable to imaging atmospheric Cherenkov telescopes.
... More
Presented by Ms. Michelle HUI
on
9/7/2007
at
19:45
Galactic cosmic rays in the energy range from several hundred MeV to tens of
GeV are subjected to heliospheric modulation, which charges their intensity and
spectrum during 11-year cycle. Since the drift modulation processes are
charge/polarity dependent, the 22-year solar magnetic field cycle is visible in
cosmic ray data, e.g. in the different shapes of maxima of galactic cosmic rays
i
... More
Presented by Dr. Sampati kumar MISHRA
High-peaked BL Lacertae objects are the prime source population for studies with
Cherenkov telescopes. It is obvious that monitoring observations of strong blazars
are orthogonal to the mission of the larger Cherenkov telescopes, as H.E.S.S. and
MAGIC with their discovery potential for new sources (luminosity function, redshift
distribution).
We propose to set up a Cherenkov telescope with lo
... More
Presented by Markus MEYER
on
9/7/2007
at
19:45
A systematic study has been performed to derive a relationship between cosmic
ray intensity variation and solar wind velocity. Pressure and temperature
corrected Kiel neutron Monitor data have been used to study the isotropic
variation of cosmic ray intensity during the period 1986 to 2006. It has been
found that cosmic ray intensity shows significant changes with various
associated sola
... More
Presented by Dr. Chandra Mani TIWARI
The Poatina, Tasmania, underground muon observatory has operated since
1972, at a mean energy of response about 1.2 TeV. The observations over this
period are presented and compared with observations from other experiments.
Presented by Dr. John HUMBLE
Detailed Monte Carlo simulations of possible configurations for a future
large-scale installation of Imaging Atmospheric Cherenkov Telescopes,
the CTA (Cherenkov Telescope Array), have been carried out. This includes
a full treatment of shower fluctuations, night sky background, registration
of the signal and reconstruction of the registered showers. Although not
representing a detailed desig
... More
Presented by Dr. Thomas SCHWEIZER
on
9/7/2007
at
19:45
The Main Injector Neutrino Oscillation Search (MINOS) experiment has continued to
collect atmospheric neutrino events while doing a precision measurement of NuMI beam
nu_mu disappearance oscillations. The 5.4 kton iron calorimeter is magnetized to
provide the unique capability of discriminating between nu_mu and nu_mu_bar
interactions on an event-by-event basis and has been collecting atmosp
... More
Presented by Prof. Alec HABIG
on
9/7/2007
at
19:45
We propose a new approach to the modeling of the long period (11–year)
variations of the Galactic Cosmic Ray (GCR) intensity based on the Parker’s
transport equation. Besides very known four universal processes: convection,
diffusion, drifts due to the gradient and curvature of the regular Interplanetary
Magnetic Field (IMF) and on the warped heliospheric neutral sheet and changes
of
... More
Presented by Dr. Marek SILUSZYK
We discuss the improving of the semi-empirical model of cosmic ray (CR) modulation
proposed by us previously. In order to describe the long-term variations with more
complete reflection in the CR modulation of the complex interaction of global and
local solar magnetic fields it has been proposed to introduce into the model the next
characteristics: the solar magnetic field polarity, the integr
... More
Presented by Dr. Raisa GUSHCHINA
on
9/7/2007
at
19:45
A magnetic detector such as MINOS which is measuring the sign of muons has
to deal with issues of bending, which depend on the magnetic field
configuration, and multiple scattering, which depends on the amount of material
which is traversed. Above some momentum which depends on these factors,
the momentum cannot be resolved. Issues related to measurement of the
muon charge ratio in the
... More
Presented by Dr. Maury GOODMAN
on
9/7/2007
at
19:45
In the analysis of Imaging Air Cerenkov Telescope (IACT) data, offset and/or
extended source observations require more sophisticated schemes for
determining the presence and statistical significance of any excess gamma ray
signal than the standard Li and Ma On-Off technique that has been
conventionally used in the analysis of point sources. Although arrays of multiple
telescopes have muc
... More
Presented by Dr. Glenn SEMBROSKI
on
9/7/2007
at
19:45
High-statistics data collected with Russian-Italian coordinate detector DECOR are
analyzed. Precise measurements of muon angular distributions in zenith angle interval
from 20 to 90 degrees have been performed. In total, more than 160 million muons are
selected. Dependences of the absolute integral muon intensity on zenith angle for
several threshold energies ranging from 1.7 GeV up to 7 GeV a
... More
Presented by Dr. Igor YASHIN
on
9/7/2007
at
19:45
The balloon-borne ANITA high energy neutrino telescope successfully launched
on December 15, 2006 and flew for a little less than 35 days. Its primary
mission is to detect astrophysical neutrinos with energies in excess
of 10^19 eV. Neutrino interactions in Antarctic ice produce short, intense
radio pulses that are detected by ANITA at distances as large as 600 km.
The usual detection scena
... More
Presented by Prof. Steven BARWICK
on
9/7/2007
at
19:45
Each of the VERITAS telescopes has 345 adjustable glass facets
which were manufactured by D.O.T.I., Roundrock, Texas with
slumping and grinding to get the optical figure. The facets
were aluminized and anodized at the Whipple Observatory. The
parameters (reflectivity, focal length and blur circle) were
measured. The design specifications for focal length (12.00 m
+/- 1%) and spot size (< 10
... More
Presented by J. PERKINS
on
9/7/2007
at
19:45
The MAGIC Collaboration operates the 17m imaging Cherenkov telescope on the Canary
island La Palma. The main goal of the experiment is an energy threshold below 100 GeV
for primary gamma rays. The new analysis technique (model analysis) takes advantage
of the high resolution (both in space and time) camera by fitting the averaged
expected templates of the shower development to the measured sho
... More
Presented by Mr. Daniel MAZIN
on
9/7/2007
at
19:45
The heliospheric interface is calculated using a three-fluid hydrodynamic model.
Using this approach the effects of different solar wind profiles, as they may
occur during different levels of solar activity, on the heliospheric structure and
the distribution of hydrogen and pickup ions are calculated self-consistently.
We present a time dependent parameter study with respect to the solar w
... More
Presented by Dr. Stefan FERREIRA
on
9/7/2007
at
19:45
The Milagro gamma-ray observatory is a water-Cherenkov detector capable
of observing air showers produced by very high energy gamma-rays. The sensitivity and
performance of the detector is determined by a detailed Monte Carlo
simulation and verified through the observation of gamma-ray sources
and the isotropic cosmic-ray background. Corsika is used for simulating
the extensive air showers pr
... More
Presented by Mr. Vlasios VASILEIOU
on
9/7/2007
at
19:45
MAGIC-II, a two 17m telescope system, will start operating at La Palma in the fall of
2007. Its main goal is to improve the sensitivity in the stereoscopic/coincident
operational mode. At the same time it will lower the analysis threshold of the
currently running single MAGIC telescope. Results from the Monte Carlo simulations of
this system will be discussed. A comparison of the two telescope
... More
Presented by Mr. Nepomuk OTTE
on
9/7/2007
at
19:45
The Very High Energy Telescope Array (VERITAS) is a system of four imaging Cherenkov
telescopes located at the Fred Lawrence Whipple Observatory in southern Arizona. We
present here results of detailed Monte Carlo simulations of the array response to
extensive air showers. Cherenkov image and shower parameter distributions are
calculated and show good agreement with distributions obtained from
... More
Presented by Dr. Gernot MAIER
on
9/7/2007
at
19:45
Multi-prong tracks have been recorded in the polyethylene terepthalate
(C10H8O4) solid-state nuclear track detector by exposing it to a 252Cf fission
source. After etching with 6.25N NaOH solution at temperature 55±0.1 C, for
four hours, two-prong to six-prong tracks along with single tracks were
observed under the objective of an optical microscope. Cross section of
fragmentation decre
... More
Presented by Dr. S DEY
We discuss the energy distribution of produced particles in multiple particle
production empirically summarizing the available data, obtained by cosmic-ray and
accelerator experiments, of charged particles and $\gamma$'s at high energies.
Based on these data which are expressed by various quantities and by various
variables at various rapidity ranges by respective experimental groups, we const
... More
Presented by Dr. Akinori OHSAWA
Data collected during the year 2006 by the first 9 strings of IceCube
have been used to measure the energy spectrum of the atmospheric
neutrino flux. Atmospheric neutrinos, an important scientific output
by itself (for instance, to understand the high-energy hadronic
interaction models), are also fundamental in order to check the
performance of the detector and to estimate the background for
... More
Presented by Dr. Juan-de-Dios ZORNOZA
on
9/7/2007
at
19:45
A review of measurements of the muon energy spectra for different altitudes, height
and directions performed with devices placed at various geomagnetic latitudes is
presented. The theoretically motivated final fit to the existing experimental
differential and integral data will be presented. The muon spectra and the muon
charge ratio, defined as the ratio of positive to negative muon fluxes, a
... More
Presented by Prof. Janusz KEMPA
on
9/7/2007
at
19:45
The Main Injector Neutrino Oscillation Search (MINOS) long baseline experiment
has been actively taking beam data since 2005, having already
accumulated 2.6E20 protons-on-target. MINOS uses the most
powerful neutrino beam currently in operation measured in two
locations: a Near detector at Fermilab, close to beam production, and
a Far detector, 735 km downstream, in Northern Minnesota.
Alth
... More
Presented by Dr. Alexandre SOUSA
on
9/7/2007
at
19:45
One of the physics goals in SK-III is the observation of relic supernova
neutrinos from the identification of their electron anti-neutrino component.
Application of the delayed coincidence method benefits as a powerful tool
in the selection of an electron anti-neutrino with largely reduced background.
This selection is accomplished by detecting both a positron and a neutron
created in the inv
... More
Presented by Dr. Hideki WATANABE
on
9/7/2007
at
19:45
In 80th a new type of APDs with negative local feedback which significantly
reduces the excess noise factor introduced by the avalanche process - the
metal-resistive layer-semiconductor (MRS) APDs - were developed in INR
(Moscow) by Sadygov et al. in the frameworks of the Soviet DUMAND program
led by M.A. Markov.
In 90th and during a few last years some new kinds of the Micro-pixel
Aval
... More
Presented by Dr. Igor ZHELEZNYKH
on
9/7/2007
at
19:45
The Large Area Telescope (LAT) on board of the Gamma-ray Large Area Space Telescope (GLAST) aims to perform
gamma-ray astronomy in the energy range 20 MeV to 300 GeV. GLAST will be launched at the fall of 2007,
opening a new and important window on a wide variety of high energy astrophysical phenomena . The LAT
consists of 16 identical towers in a four-by-four grid, each one containing a pai
... More
Presented by Dr. David PANEQUE
We have performed a study of the events recorded by NT detectors assembled in a large area and exposed for long
time at a high altitude site where the flux of cosmic ray secondaries, especially neutrons, is very high.
Simulations of the interactions in the surrounding materials and of the responses of the NT detectors have been
carried out. The results are compared with the main features of t
... More
Presented by Dr. stefano CECCHINI
The 5.4 kT MINOS Far Detector (Fardet) has accumulated 45 million
cosmic-ray induced
muon tracks since it began operation in 2003. An analysis of the muon
flux in the direction of the Moon and Sun, which both obscure a
circular disc of similar radius as viewed from Earth, have
revealed statistically significant deficits. The shadow of the moon has
been used to establish the alignment and
... More
Presented by Eric GRASHORN
on
9/7/2007
at
19:45
We study the capability of the MAGIC telescope to observe under moderate moonlight.
TeV gamma-ray signals from the Crab nebula were detected with the MAGIC telescope
during periods when the Moon was above the horizon and during twilight. This was
accomplished by increasing the trigger discriminator thresholds. No change is
necessary in the high voltage settings since the camera PMTs were espec
... More
Presented by Dr. Emma OÑA-WILHELMI, Dr. Javier RICO
on
9/7/2007
at
19:45
The long-term experiment of the regular balloon cosmic ray monitoring in the Earth’s
atmosphere has been carried out by Lebedev Physical Institute, RAS, Moscow, Russia,
for almost 50 years (since July 1957) and still provides useful data on both galactic
and solar cosmic rays. However there are some flaws in the standard method of data
registration that sometimes hinder getting good data. To
... More
Presented by Dr. Mikhail KRAINEV
on
9/7/2007
at
19:45
The Laser Interferometer Gravitational-Wave Observatory (LIGO) consists of
Fabry-Perot Michelson interferometers designed to measure gravitational
waves at frequencies between 10 Hz and 3 kHz. One potential noise source in
this frequency range is the buildup and motion of surface charge on the optics,
which can be generated through friction with air, contact with other materials,
or int
... More
Presented by Dr. Dennis UGOLINI
on
9/7/2007
at
19:45
Recent observations of the Matsushiro deep underground muon telescope indicate that,
the solar diurnal variation (after correcting for the Compton-Getting anisotropy due
to the Earth's orbital motion) has a solar cycle variation and a 0.04\% wave extends
to rigidities as high as several hundreds of GV during solar maximum. We construct a
simple model to simulate the motion of high-rigidity par
... More
Presented by Dr. Jozsef KOTA
on
9/7/2007
at
19:45
We exposed three stacks of Polyethylene Terephthalate (PET) detectors each of
thickness 100 micron and area 21cm X 30cm at Darjeeling, India (North East
Himalayan Range), under an atmospheric pressure of 765 hPa. This particular
brand (Desmat Century) of plastics is found to have a charge detection
threshold (Z/beta) >140. These stack of detectors were kept in the open air for
182 days i
... More
Presented by Prof. S RAHA
MAGIC, a 17m diameter Cherenkov telescope locating at the La Palma Canary island, is
the biggest IACT (Imaging Atmospheric Cherenkov Telescope) in the world. For lowering
the energy threshold and improving the sensitivity, the MAGIC collaboration is going
to build a second telescope (MAGIC II), using a better sensitivity of
Photomultipliers(PMT). Variety of measurements about different charact
... More
Presented by Mr. Ching-Cheng HSU
on
9/7/2007
at
19:45
The IceCube Neutrino Observatory is currently under construction at the South Pole, Antarctica, and 22 strings (of
80) have so far been installed. The observatory is surrounding the AMANDA neutrino telescope, which is running
since 2000. The combination of the AMANDA telescope and the Icecube strings will improve the sensitivity to
neutrinos from Dark Matter annihilation. This paper will di
... More
Presented by Mr. Gustav WIKSTROM
on
9/7/2007
at
19:45
A key problem of cosmic ray astrophysics is the explanation of measured parallel and
perpendicular mean free paths in the heliosphere. Previous approaches used
quasilinear theory in combination with simple turbulence models to reproduce
heliospheric observations. Because of recent progress in transport and turbulence
theory linear and nonlinear diffusion coefficients within an improved dynamic
... More
Presented by Dr. Andreas SHALCHI
on
9/7/2007
at
19:45
The studies of two and three particle correlations for the grey particles
emitted in the interactions of of 12C, 16O, 28Si (4.5 A GeV/c), and 22 Ne (4.1 A
GeV/c) projectiles with emulsion have been investigated in the pseudorapidity
interval and azimuthal interval .
The results showed the formation of hadronic or baryonic cluster which may
reflect the sidward flow of nuclear matter.
Presented by Dr. sayed SALEH
In the structure of the Yakutsk installation complex to measure cosmic ray
intensity there is a unique device - the ionization chamber of large size ASK-1.
Such a chamber allows to investigate physical characteristics of ionization
pushes i.e. events when ionization sharply increases. The effect is caused by
the showers formed mainly by cosmic ray particles in the screen or in the
... More
Presented by Dr. Vladislav TIMOFEEV
We study the features of the power energy spectrum of the 27–day variation of
the galactic cosmic ray intensity by neutron monitors experimental data for
different epoch of solar activity in various polarity periods of solar magnetic
cycles. It is recognized that, averagely, the power energy spectrum of the 27–
day variation of the galactic cosmic ray intensity has tendency to be harder
... More
Presented by Dr. Agnieszka GIL
on
9/7/2007
at
19:45
We have been developing a gas time projection chamber for the imaging of
gamma-rays between 0.3 - 50 MeV, the Three-Dimensional Track Imager
(3DTI). The detector is being designed for use on satellite experiments for the
imaging of astrophysical gamma-ray sources. Electrons produced by pair
production or Compton scattering ionize the gas and these ionization electrons
are detected by th
... More
Presented by Dr. Seunghee SON
on
9/7/2007
at
19:45
The Milagro experiment observes the extensive air showers produced by very high energy
gamma-rays impacting the Earth’s atmosphere. Milagro uses 898 Hamamatsu R5912
Photomultiplier Tubes. To complete our Monte Carlo simulations, we tested the
photocathode uniformity of our PMTs. The main finding was that the PMT gain and
detection efficiency are a function of the distance from the center of
... More
Presented by Mr. Vlasios VASILEIOU
on
9/7/2007
at
19:45
The high end of the neutrino spectrum observable with the Super-Kamiokande experiment
is seen as upward-going muons from nu_mu interactions in the rock surrounding the
detector. Division of these neutrino-induced events into those which stop in the
detector, those which cross the detector, and those with catastrophic energy losses
creates three data samples, with typical parent neutrino energ
... More
Presented by Prof. Alec HABIG
The solar activity has been propose as one of the main factors of the climatic
variability. Also another type of processes, the biological ones, have been
proposed as important factor in the climatic variation through the modification
of the cloud albedo. In the present work we used the wavelet analysis to
investigate the relation between the polar concentrations of Methane Sulphonic
Aci
... More
Presented by Mr. Jaime Arturo OSORIO ROSALES
on
9/7/2007
at
19:45
Powerful nanosecond light sources based on LED have been developed for
using in astroparticle physics experiments. The light sources use either
matrixes of ultra bright blue InGaN LEDs or new generation high power LEDs. It
is shown that such light sources have light yield of up to 10**11 with very fast
light emission kinetics. Described light sources are important for using in
calibratio
... More
Presented by Mr. Bator SHAIBONOV
on
9/7/2007
at
19:45
We present a study of the interaction of low energy electron neutrinos
on nuclei that undergo beta decay. Remarkably, we found that in
the limit of very low neutrino energy the product of the cross section times
the neutrino velocity take values up to $10^{-42}$ cm$^2$ $c$ for some specific
nuclei that decay via allowed transitions. The absence of an energy threshold
and the value of the cros
... More
Presented by Dr. Alfredo Giuseppe COCCO
on
9/7/2007
at
19:45
We are proposing the CALET (CALorimetric Electron Telescope) instrument for the observation of high-energy
electrons and gamma rays at the Exposed Facility of the Japanese Experiment Module on the International Space
Station (ISS). The CALET detector consists of an imaging calorimeter with scintillating fibers and tungsten
plates, and a total absorption calorimeter with crystal scintillators.
... More
Presented by Dr. Kenji YOSHIDA
on
9/7/2007
at
19:45
The CORSIKA programme and specific Monte Carlo collision generators are employed
in the
interpretation of X-ray emulsion chambers data on super gamma ray families at mountain
altitude (Chacaltaya, Kanbala, Pamir...) and in the stratosphere (Concorde, balloons).
The consequences of measurement conditions(energy thresholds levels...) are
detailed to
extract common features for the
... More
Presented by Prof. JEAN-NOEL CAPDEVIELLE
on
9/7/2007
at
19:45
Radial variations of quiet-time fluxes of ~1-30 MeV protons are examined at
distances of 2-85 AU using Voyager 1-2 (LECP, CRS) and Ulysses (LET) data.
Attention is focused on the solar cycle minima of 1985-87 and 1995-97.
Gradient values calculated from particle fluxes show an increase between 30
and 70 AU during the recovery phases of galactic cosmic ray intensity. The
energy spectra ch
... More
Presented by Prof. Yu.I. LOGACHEV
on
9/7/2007
at
19:45
We explore the sensitivity of a neutrino detector employing strongly directional
high gain antennas to detect the conversion of neutrinos in the 10^16 eV range in a
mountain or the earth crust. The directionality of the antennas will allow both, the
low threshold and the suppression of background. This technology would have the
advantage that it does not require a suitable atmosphere as optic
... More
Presented by Mrs. Olga BRUSOVA
on
9/7/2007
at
19:45
Today the Hybrid Photon Detector (HPD) is one of the few low light level
(LLL) sensors that can provide an excellent single and multiple
photoelectron (ph.e.) amplitude resolution.
The recently developed HPDs from Hamamatsu with a GaAsP photocathode,
namely the R9792U, provide a peak quantum efficiency (QE) of 55% and
a pulse width of ~2 nsec. In addition, the afterpulsing rate of these t
... More
Presented by Mr. TakaYuki SAITO
on
9/7/2007
at
19:45
A search for low velocity exotic particles is performed. The whole data set of
L3+C events is analyzed, and the result is presented.
Presented by Dr. Xinhua MA
Abstract
A detailed study has been conducted on the long-term changes in the semi-
diurnal anisotropy of cosmic rays using the ground based Deep River neutron
monitor data during significantly low amplitude anisotropic wave train events
(LAEs) in cosmic ray intensity for the period 1981-94. It has been observed that
the phase of the semi-diurnal anisotropy for majority of the LAE events
... More
Presented by Dr. RAJESH Kumar MISHRA
In order to perform the influence of solar activity parameters (Sun spot numbers
SSN) on cosmic ray intensity (CRI), we have used six monthly averaged cosmic
ray data from Oulu (Rc = 0.78Gv) and Rome (Rc = 6.32GV) neutron monitoring
stations for three solar cycles. (21 - 23). The detailed analysis of hysteresis
effect between SSN & CRI has been done. The area of hysteresis loops and
time
... More
Presented by Dr. M.L. CHAUHAN
In this analysis 3329 neutrino events detected by AMANDA-II during the years
2000-2003 are analysed for anisotropies or unexpected structures in their arrival
direction. The structures could arise due to the presence of a signal from many weak
and therefore unresolved cosmic neutrino sources, extended sources or a few brighter
sources.
For the first time a technique, well known from the ana
... More
Presented by Jan-Patrick HÜLß
on
9/7/2007
at
19:45
A search for neutron-antineutron oscillation, a |delta B| = 2 process predicted
by L-R symmetric gauge theories, was undertaken using the 24.5 x 10^33
neutron-years of exposure in run one of Super-Kamiokande. When
incorporating most major sources of systematic and statistical errors we
calculate the upper limit on the oscillation lifetime of neutrons in oxygen to be
1.78 x 10^32 years at
... More
Presented by Prof. Kenneth GANEZER
on
9/7/2007
at
19:45
The Antartic Neutrino Telescope AMANDA and its succesor IceCube can be used for
searches for cosmic point sources of neutrinos with a wide range of energy. The
highest of these energy bands spans from about 10^5 to 10^10 GeV. Several
source models predict a significant neutrino flux in this part of the spectrum, for
example from Active Galactic Nuclei. Since the interaction length of these neu
... More
Presented by Mrs. Elisa BERNARDINI
on
9/7/2007
at
19:45
The observation of high energy neutrinos would be a significant constraint for
non thermal processes in astrophysical sources (active galactic nuclei,
supernovae remnants…). Moreover it would also be the evidence for cosmic ray
acceleration inside our galaxy. Recent precise measurements of the cosmic
gamma-ray spectrum above 1 TeV with the High Energy Stereoscopy System
(H.E.S.S.) inst
... More
Presented by Mr. rezo SHANIDZE
on
9/7/2007
at
19:45
This paper presents the average sidereal anisotropy (SA) of sub-TeV galactic
cosmic ray intensity observed with a two-hemisphere network (THN) of
underground muon detectors over 15 years. The average SA confirms the
conclusions derived from the initial 5-year data by THN, while the long-term
observations allow us to examine modulations over the solar activity and
magnetic cycles. The THN
... More
Presented by Prof. Kazuoki MUNAKATA
The sidereal daily variation is investigated by using the continuous observation
data of ground and underground (7, 20 and 60 m w.e.) muon cosmic ray
intensities for the 1972 to 2001 period. The results obtained are discussed in
the light of the supposed sources of heliospheric and galactic origin.
Presented by Dr. Sardaana GERASIMOVA
on
9/7/2007
at
19:45
The balloon-borne ANITA neutrino telescope completed a successful 35-day
flight during the 2006-2007 austral summer. The primary goal of ANITA is to
search for evidence of ultra high-energy neutrinos (E > 10^19 eV) interacting
in the Antarctic ice sheets. In this paper, we present preliminary results of the
simulated sensitivity of ANITA, incorporating the actual flight path, geographic
... More
Presented by D. GOLDSTEIN
on
9/7/2007
at
19:45
TenTen is a proposed array of Imaging Atmospheric Cherenkov Telescopes (IACT)
optimised for the gamma ray energy regime above 10 TeV. It will offer a collecting
area of 10 km^2 above energies of 10 TeV. In the initial phase, a cell of 3 to 5
modest-sized telescopes, each with 10-20 m^2 mirror area, is planned for an
Australian site. A possible expansion of the array would
comprise many such c
... More
Presented by Mr. Victor STAMATESCU
on
9/7/2007
at
19:45
A Tau lepton can be produced in a charged current interaction of cosmic ray
tau neutrino with materials inside a mountain. If it escapes from mountain, it
will decay and initiate a shower in the air, which can be detected by air shower
fluorescence/Cerenkov light detector. A Monte Carlo simulation for CRTNT
(Cosmic Ray Tau Neutrino Telescopes) detector near Mt. Balikun in Xinjiang,
China
... More
Presented by Dr. J. LIU
Antarctic Ross Ice Shelf ANtenna Neutrino Array (ARIANNA) is a new concept of a large
radio telescope which consists of 10,000 broadband antenna stations located on the
surface of the Ross Ice Shelf in Antarctica. Primary goals of ARIANNA are to test the
GZK (Greisen-Zatsepin-Kuzmin) neutrino production and to measure the neutrino
cross-section near 100 TeV. We present here a Monte Carlo simul
... More
Presented by J. NAM
on
9/7/2007
at
19:45
A Monte-Carlo simulation code SHINIE is developed from high energy neutrino
experiments above or under ground. Initially development is for Earth-skimming
tau neutrino experiment. Recent updates of muon and electron neutrinos
enable this code to simulate all flavors of neutrinos. This talk will demonstrate
the capability of SHINIE. We also point out an important method to study
neutrino
... More
Presented by Prof. Minghuey Alfred HUANG
The WILLI calorimeter, installed in NIPNE Bucharest, is operated since
several years for measuring low energy (E<1GeV) charge ratio of atmospheric
muons, including its directional dependence. Recently a project was proposed
to combine WILLI with a mini-array of 12 scintillators in order to measure muon
charge ratio in EAS. This experiment could provide further information on
shower develop
... More
Presented by Mr. Bogdan MITRICA
on
9/7/2007
at
19:45
Radio signals produced in ice by electromagnetic cascades with energies up to
10^15 eV have been calculated. Simulations of cascades were performed using
the SIMEX Code System. The simulation results in the matrix form, which
described the charge excess evolution, were used to calculate coherent
Cherenkov radio field from electromagnetic cascades. Comparison with results
received in the
... More
Presented by Dr. Igor ZHELEZNYKH
on
9/7/2007
at
19:45
We consider the possible use of water and ice
detectors designed for other purposes as detectors
for slow magnetic monopoles. The mechanism we
assume to dominate is monopole catalyzed baryon
decay which can very efficiently turn protons
into electromagnetic energy. Estimates of sensitivity
for existing detectors are given.
Presented by Prof. John SWAIN
on
9/7/2007
at
19:45
The sun is variable in its magnetic activity with 11-year Schwabe cycle. This
cyclic variation of solar activity modulates the energy spectrum of galactic
cosmic rays entering the heliosphere and therefore the terrestrial radiocarbon
production rate in the atmosphere changes with the same periodicity. Since
the radiocarbon is taken into tree rings after the carbon cycle, the radiocarbon
... More
Presented by Prof. Kimiaki MASUDA
on
9/7/2007
at
19:45
In this work we report an analysis of various indices of solar magnetic variability
of closed and open field, concentrating particularly in the quasi-biennial
peridicities (1.7-2.5 years). The wavelet technique is used in the time series of
the solar indices to find the significant periodicities of our study, we also use
other wavelet analysis already made. We consider the theory of a doub
... More
Presented by Mr. Luis DE CASO
on
9/7/2007
at
19:45
GRAND is an array of position sensitive proportional wire chambers (PWCs) located at
86.2 deg W, 41.7 deg
N at an elevation of 220 m and is adjacent to the campus of the University of Notre
Dame. The geometry of
the PWCs allows the angles of the charged secondary tracks to be measured to +/- 0.3
deg in each of two
orthogonal planes. Muons are 99% differentiated from electron tracks in t
... More
Presented by Prof. John POIRIER
on
9/7/2007
at
19:45
We present a new method to include a wavy heliospheric current sheet into a 2D
numerical model of the heliospheric transport of galactic cosmic rays. Since the wavy
current sheet has essentially 3D structure, we have developed an approach of
averaging the corresponding drift effect over all longitudes for an axisymmetric
model. First, an analytical solution is found for the flat sheet, this mo
... More
Presented by Dr. Ilya USOSKIN
on
9/7/2007
at
19:45
Modified Henon–Heiles system describing geodesic in gravitational waves has
already been investigated. There chaotic sense is inferred by the presence of
fractal structure of the boundaries separating the basins of possible escapes.
In this paper, observed chaotic behaviour is characterized by the formalism
appropriating the signature of curvature tensor associated with the space-time
... More
Presented by Dr. Balendra Kr. DEV CHOUDHURY
on
9/7/2007
at
19:45
Mass-induced oscillations between muon neutrinos and tau neutrinos have become the standard theory accounting
for the zenith angle distributions of atmospheric neutrinos. However, there are other models which are able to
produce similar effects and they are of both theoretical and experimental interest. In this talk, a neutrino oscillation
analysis between muon neutrinos and tau neutrinos is
... More
Presented by Mr. Wei WANG
The emission of charged particles in 4.5 GeV/c proton-Emulsion interactions
has been studied. The emulsion plates have been irradiated at Dubna
Synchrophasatron.The experimental data were obtained at the Laboratory of
High Energy Physics (LHEP)at
Cairo University. Events have been chosen from the experimental data at
certen conditions. In the present studies the average transverse momentu
... More
Presented by Dr. sayed SALEH
The energy region above the knee is studied through the e.m. and muon
detectors at the GAMMA experiment (Mt. Aragats). We present analysis of the
truncated number of muons shower size and other muon characteristics vs
shower size and primary energy. The muon size spectrum for the muon energy
threshold 5 GeV is also presented. The data are interpreted by means of
simulations based on the
... More
Presented by Dr. A.P. GARYAKA
The semi diurnal anisotropy of cosmic ray Intensity for four different groups of
days i.e. 60 Quiet days (60 QD),120 Quiet days (120 QD), continuous Quiet
days (CQD) and all days (AD) have been analysed with planetary index Ap,
Interplanetary magnetic field (B) and solar wind velocity (V) for the period 1985
to 1995. The annual average values of semidiurnal amplitude and phase are
observ
... More
Presented by Dr. M.L. CHAUHAN
The cosmic ray(CR) intensity data record with Goose bay Neutron Monitoring
Station have been investigated on 60 quietest days (QD) in a year for studying
the variation in tri-diurnal anisotropy during solar cycle 21 and 22. It has been
observed that in spite of abrupt change in the amplitude and phase of tri-
diurnal anisotropy in CR intensity, the amplitude is quite significance throu
... More
Presented by Mr. Mahendra RICHHARIA
on
9/7/2007
at
19:45
The Tibet air shower array, consisting of 533 scintillation counters
which are placed in a lattice with 7.5 m spacing, has been in
operation since 1999 at Yangbajing in Tibet, China at an altitude of
4,300 m above sea level. We found a modest discrimination between
gamma- and proton-initiated air showers based on air shower profiles
observed by the Tibet air shower array. This method is app
... More
Presented by Dr. Masato TAKITA
on
9/7/2007
at
19:45
This paper examines the relationship between diurnal variations of cosmic ray
intensity with average value of interplanetary magnetic field B, for the period
1989 to 2005. The effect on the annual average values of diurnal amplitude
and phase with B have been investigated and it has been observed that the
diurnal phase shifted to earlier hours in during the descending phase of the
solar
... More
Presented by Dr. Ajay Kumar PANDEY
Very High Energy Gamma Astronomy is one of the scientific aims of the ARGO-YBJ
experiment (YangBaJing, P.R. China), an extensive air shower detector made of a
single layer of Resistive Plate Chambers covering a surface of about 6700 m2. The
exploitation of the full coverage approach (93% of active area) together with the
very high altitude location (4300 m a.s.l.) allows to put the energy thre
... More
Presented by Mrs. Milena DATTOLI
on
9/7/2007
at
19:45
Abstract
The first three harmonics of high amplitude anisotropic wave trains of cosmic ray
intensity over the period 1991-1994 have been investigated for Deep River
neutron monitoring station. It is observed that the diurnal time of maximum
remains in the corotational direction, whereas the time of maximum for semi-
diurnal anisotropy has no definite trend as compared to the quiet day annu
... More
Presented by Dr. RAJESH Kumar MISHRA
Abstract
The present work deals with the study of first three harmonics of low amplitude
anisotropic wave trains of cosmic ray intensity over the period 1991-1994 for
Deep River neutron monitoring station. It is observed that the diurnal time of
maximum remains in the corotational direction; whereas, the time of maximum
for both diurnal and semi-diurnal anisotropy has significantly shifte
... More
Presented by Dr. RAJESH Kumar MISHRA
We study features of the 27-day variation of the galactic cosmic ray (GCR) three
dimensional anisotropy calculated by the global spherical analyses method (GSM) using
Fourier harmonic frequency filter, Chree’s diagram and epicyclegrams. We found that
the greater amplitudes of the 27-day variation of the GCR anisotropy in the minima
epoch of solar activity for the A>0 polarity period than for
... More
Presented by Ms. Renata MODZELEWSKA
on
9/7/2007
at
19:45
The long term modulation of the cosmic ray intensity includes both
Sun and celestial anisotropies. The solar activity is due to high
energy flares producing a decrease (known as Forbush Decrease, FD)
in the cosmic ray intensity, with a time scale of the order of a few
days, often accompained by a Ground Level Enhancement,
due to direct Sun emission during the solar flare.
The celest
... More
Presented by Mrs. Irina JAMES
on
9/7/2007
at
19:45
In February 2007 the MAGIC Air Cherenkov Telescope for gamma-ray astronomy was fully
upgraded with a ultra fast 2GSamples/s digitization system. Since the gamma-ray
signals are very short, a fast readout can minimize the influence of the background
from the light of the night sky. Also, the time structure of the event is an
additional parameter to reduce the background from unwanted hadronic s
... More
Presented by Dr. Abelardo MORALEJO
on
9/7/2007
at
19:45
The study of time lags between spikes in Gamma-Ray Bursts light curves in different energy bands as a function
of redshift may lead to the detection of effects due to Quantum Gravity. We present an analysis of 15 Gamma-
Ray Bursts with measured redshift, detected by the HETE-2 mission between 2001 and 2006 in order to measure
time lags related to astrophysical effects and search for Quantum G
... More
Presented by Dr. Julien BOLMONT
on
9/7/2007
at
19:45
The solar activity in Cycle 23 gradually changes to final minimum phase. Sun's shadow generated by multi-TeV
cosmic-ray particles has been continuously observed with the Tibet-II and Tibet-III air shower array in 1996
through 2006 during almost whole period of the Solar Cycle 23. We have shown that the Sun’s shadow is strongly
affected by the solar and interplanetary magnetic fields chang
... More
Presented by Dr. MASAKI NISHIZAWA
on
9/7/2007
at
19:45
"Delayed" EAS with N_e>5.10^6 particles are
registered. It were detected 2117 showers with number of particles above 10^7, in 98
from these events "delayed" EAS with N_e>5.10^6 particles were detected. Impulse
delay for the time from 40 up to 600 ns was registered. In 14 events delayed impulses
were registered in 2 and more detectors and in 3 events - in 4 detectors.
Average delay betwe
... More
Presented by Prof. Vladimir YAKOVLEV
on
9/7/2007
at
19:45
The MAGIC telescope located on the Roque de los Muchachos on the Canary Island La Palma at a height of
2200m a.s.l. is able to point to the sea. This allows to search for air shower signatures induced by particles
coming out of the Earth. Taking into account the huge effective area, this configuration can be used to
search for tau-neutrinos.
We will show the outcome of simulations for tau
... More
Presented by Dr. Markus GAUG, Dr. Ching-Cheng HSU
on
9/7/2007
at
19:45
An overview of TeVCat, a new online interactive catalog for very high energy (VHE; E
> 50 GeV) gamma-ray astronomy is presented. As VHE astronomy continues to grow, the
usefulness of a one-stop clearing house for information on new sources is
increasingly evident. TeVCat is intended to be such a resource. With sky maps, source
information, visibility plotters and linked references, it will hel
... More
Presented by Prof. Scott WAKELY
on
9/7/2007
at
19:45
We have developed the technical data acquisition equipment (TEDA) for Green
House Observing Satellite (GOSAT). GOSAT will be launched in middle of 2008
into sun synchronous sub-recurrent orbit with altitude of 666km and inclination
of 98deg, and nominal mission duration is 5years.
TEDA is a comprehensive orbital radiation environment monitor system
designed to provide measurement of th
... More
Presented by Mr. yasutomo SASAKI
on
9/7/2007
at
19:45
Several phenomenological models of physics beyond the Standard Model
predict flavor mixing in the neutrino sector in addition to conventional
mass-induced oscillations. In particular, violation of Lorentz invariance,
violation of the equivalence principle, and quantum decoherence can each
result in observable distortions in the high-energy atmospheric neutrino
spectrum. We report on a sear
... More
Presented by Mr. John KELLEY
on
9/7/2007
at
19:45
The solar periodicities of 80-88 yrs (Gleissberg cycle) and 205 yrs (de Vries cycle or Suess cycle) using different
time series of proxies of cosmogenic isotopes have been reported in a great number of papers.
In this work we present a more objective and general cycle-length determination applying the wavelet
transformation based on the Morlet wavelet to the cosmogenic isotopes. We use the IN
... More
Presented by Dr. Victor Manuel VELASCO HERRERA
on
9/7/2007
at
19:45
The ANTARES collaboration is building an underwater neutrino telescope at
2500 m depth in the Mediterranean Sea. The experiment aims to detect high-
energy cosmic neutrinos using a 3D array of 900 photomultipliers distributed
along 12 lines. 5 such lines have been operational since January 2007. The
PMTs collect the Cherenkov light induced by neutrino-produced charged
particles in the wat
... More
Presented by Dr. Marco CIRCELLA
on
9/7/2007
at
19:45
The ANTARES neutrino telescope is being constructed in the Mediterranean Sea.
The complete detector will consist of 12 strings, supplemented by an additional
instrumentation line. Five strings are at present deployed and operating.
Each string is equipped with 75 Optical Modules (OMs) housing the photomultipliers
to detect the Cherenkov light induced by the charged particles produced in
... More
Presented by Mr. Felix FEHR
on
9/7/2007
at
19:45
One of the main design goals of the MAGIC telescopes is the very fast repositioning
in case of e.g. GRB alarms, implying a low weight of the reflector dish. This is
accomplished by using a space frame made of carbon fiber epoxy tubes, resulting in a
strong but not very rigid support structure. Therefore it is necessary to readjust
the individual mirror tiles to correct for deformations of the
... More
Presented by A. BILAND
on
9/7/2007
at
19:45
The Alpha Magnetic Spectrometer (AMS) is a particle physics detector designed
to measure charged cosmic rays spectra up to TV region, with high energy
photon detection capability up to few hundred GeV. With the large acceptance,
the long duration (3 years) and the state of the art particle identification
techniques, AMS will provide the most sensitive search for the existence of anti
mat
... More
Presented by Prof. Bruna BERTUCCI
on
9/7/2007
at
19:45
We present results on searches for exotic particles
(relativistic magnetic monopoles and WIMPs),
for neutrinos from an SGR Burst and for UHE muons,
obtained with the Baikal telescope NT200 from 1998-2005.
Presented by et al. WISCHNEWSKI, R.
on
9/7/2007
at
19:45
The MAGIC telescope has been designed for the observation of the Cherenkov light
generated in
Extensive Air Showers. However, its 17 m. diameter and optical design makes it
suitable for optical
observations as well. In this contribution, we describe the final set-up and
performance of a system
installed at the center of the MAGIC camera (the central pixel) and based on the use
of a dedicate
... More
Presented by Prof. María Victoria FONSECA
on
9/7/2007
at
19:45
The propagation of energetic particles in the heliosphere is described by the Parker
transport equation. It includes the physical processes of diffusion, drift,
convection and adiabatic energy changes. For the modulation of the particle's energy
spectra the geometry of the heliospheric magnetic field is important, but it is still
an unsolved
problem.
In this contribution we present model c
... More
Presented by Prof. Adri BURGER
on
9/7/2007
at
19:45
The detection of astrophysical sources of high energy neutrinos is one of the
most interesting quests in modern astrophysics. Unlike gamma and X-ray
observations, the low number of signal events expected in high energy
neutrino telescopes, constrains significantly the discovery probability of the
sources. New algorithms to disentangle clusters of small number events from the
background events
... More
Presented by Mr. Juan Antonio AGUILAR SÁNCHEZ
on
9/7/2007
at
19:45
The energies of the lepton (muon and electron) which is produced by neutrino
interaction and the direction pf the incident neutrino are two fundamental
parameters for high energy neutrino astrophysics.
In the experiment for high energy neutrino astrophysics, all the most of muons
from muon neutrino events which occur inside an effective volume of the
apparatus escape from it without loos
... More
Presented by Prof. Nobusuke TAKAHASHI
on
9/7/2007
at
19:45
The H.E.S.S. Atmospheric Cherenkov Array commenced operations in 2003 and has proved
very successful, yielding numerous detections of astrophysical gamma-ray sources. The
development of H.E.S.S. is now entering a new phase, with the H.E.S.S. II project
currently at the construction stage. This upgrade includes the construction of a very
large telescope in the centre of the current H.E.S.S. arr
... More
Presented by Dr. Conor MASTERSON
Okamoto-Shibata developed a new simulation technique which is applied to
the calculation of the cascade shower, keeping the rigidity of the technique
and saving much time for computation( Okamoto and Shibata,
NIM,A257(1987)155). We apply their technique to the LPM shower in water for
the detection of the electron neutrino in extremely high energies.
The results obtained under Okamoto-Shibat
... More
Presented by Dr. Masanobu TAMADA
Quasi Elastic Scattering in the dominant mechanism for producing both Fully
Contained Events and Partially Contained Events for the examination of the
neutrino oscillation in the Super-Kasmiokande(SK) detector for the atmospheric
neutrinos in the energy range from several hundreds MeV to several GeV.
In the analysis of these neutrino events, SK collaboration assume that the
direction of t
... More
Presented by Prof. Eiichi KONISHI
on
9/7/2007
at
19:45
The proposed northern-hemisphere cubic-kilometre under water neutrino detector,
KM3NeT, promises unprecedented sensitivity to potential fluxes of neutrinos from
southern hemisphere gamma-ray counterparts. KM3NeT is briefly outlined before
gamma-ray observations of AGN are used to set upper-limits on the neutrino production
rate in these potential extragalactic cosmic ray engines. Absorption of
... More
Presented by Dr. Richard WHITE
on
9/7/2007
at
19:45
The periodicities of cosmic ray space intensity variation are analyzed using
Lomb-Scargle Fourier transformation method with about 37 billion cosmic ray
events recorded by Tibet III Air Shower Array during the period from November
1999 to November 2005. To eliminate meteorological effect, we adopt East-
West subtraction method. According to our analysis, except the well known
solar diurn
... More
Presented by Dr. aifeng LI
on
9/7/2007
at
19:45
The high-energy physics community has been discussing for years the need to
bring together the three principal disciplines that study hadron cross-section
physics - ground-based accelerators, cosmic-ray experiments in space, and air
shower research. Only recently have NASA investigators begun discussing the
use of space-borne cosmic-ray payloads to bridge the gap between accelerator
phys
... More
Presented by Dr. Thomas WILSON
on
9/7/2007
at
19:45
The VERITAS array trigger requires a simultaneous coincidence between multiple
telescopes to initiate the readout of data and is essential to reducing the
overwhelming background of local muons whilst efficiently recording light from VHE
gamma ray initiated air showers. The selection of coincident events in hardware
reduces the overall trigger rate allowing the individual telescopes to trigger
... More
Presented by Dr. Richard WHITE
on
9/7/2007
at
19:45
VERITAS is an array of Imaging Atmospheric Cherenkov Telescopes designed for
very high energy gamma ray (E>100GeV) observations of astrophysical sources.
The experiment began its scientific observation program in the 2006/2007
observing season. We describe here the analysis chain for reducing the data,
reconstructing the direction and energy of incident gamma-rays and the
rejection of backgro
... More
Presented by Dr. Michael DANIEL
on
9/7/2007
at
19:45
The VERITAS gamma-ray observatory, situated in southern Arizona, is an array of four
12-m diameter imaging Cherenkov telescopes, each with a 499-pixel
photomultiplier-tube camera. The instrument is designed to detect astrophysical
gamma rays in excess of 100GeV. At the low end of the VERITAS energy range,
fluctuations in the night sky background light and single muons from cosmic-ray
shower
... More
Presented by Dr. Amanda WEINSTEIN
on
9/7/2007
at
19:45
Compared with the analysis of Fully Contained Events and Partially Contained
Events occurring inside the detector in Superkamiokande for the investigation of
the neutrino oscillation, the analysis of the Upward Stopping Muon Events and
Upward Through Going Muon Events occurring the outside detector is much
easier, although the quality of the experimental data is inferior to the former.
We
... More
Presented by Prof. Nobusuke TAKAHASHI
on
9/7/2007
at
19:45
The 17m diamter MAGIC telescope is currently the largest single dish Cherenkov
telescope for gamma ray astronomy. Within the year 2007 it will be upgraded with a
second telescope MAGIC-II. The camera of MAGIC-II will include several new features
compared to the MAGIC-I camera. Photomultipliers with the highest available photon
collection efficiency have been selected. A modular design allows e
... More
Presented by Mr. Ching-Cheng HSU
on
9/7/2007
at
19:45
* Presenter's name and Affiliation:
P.M. Kooijman, Nationaal Instituut voor Kernfysica en Hoge-Energiefysica
(NIKHEF), P.O. Box 41882, 1009 DB Amsterdam, The Netherlands
* Title of the paper:
The development of multi-PMT optical modules with photonic readout for KM3NeT
* Preferred presentation type (oral or poster): oral
* Suggested session codes (up to 2): OG.2.7, HE.2.5
... More
Presented by Prof. Paul KOOIJMAN
The effects on the galactic cosmic ray modulation of a Parker field modified by a
atitudinal-dependent solar wind speed are numerically investigated. The
calculation of the propagation of the galactic cosmic ray is made by solving a
coupled set of the stochastic differential equations which is equivalent to the
so-called diffusion convection partial differential equation. The stochastic
... More
Presented by Ms. Shoko MIYAKE
on
9/7/2007
at
19:45
Gamma-hadron superfamily STRANA with E0 > 10^16 eV and unusual features
was detected by emulsion chamber at the board of stratospheric balloon. In the
center of the family there was found a halo. The halo and the high energy jet
producing it in the chamber are analysed here.
Presented by Dr. Vladislav OSEDLO
on
9/7/2007
at
19:45
30th International Cosmic Ray Conference
The hard X ray detector and its electronics borne by SZ2 spacecraft
H.Y. Wang, Y.Q. Ma, C.M. Zhang, Y.P. Xu, P.R. Shen, J.Z. Wang,
X.H. Liang, M. Gao M. Zhao, Y. Li
Key Laboratory of Particle Astrophysics, IHEP, Beijing 100049, PR China
Abstract
SZ2/XD is a hard x-ray detector system, which was built for monitoring of the
transient radiations, su
... More
Presented by Dr. Huanyu WANG
The muon charge ratio of the lateral muon density distributions in single
Extended Air Showers (EAS) is considered on basis of Monte Carlo simulations,
in view of proposals to measure this observable in coincidence with EAS
observations. Differences of the azimuthal variation of the muon densities of
opposite charges and the azimuthal variation of the muon charge ratio appear
to be ve
... More
Presented by Prof. Octavian SIMA
on
9/7/2007
at
19:45
The MAGIC Collaboration is building a clone, MAGIC II, of the current MAGIC
Telescope. MAGIC II will be built at 85 m of distance from MAGIC I, and will also
feature a huge reflecting surface of ~240 m^2 of area. Unlike
the former telescope, the mirrors for the new one are lighter and larger, being
square of 1 m of side and weighting 10÷12 kg. For the
development and production of th
... More
Presented by Dr. Denis BASTIERI
on
9/7/2007
at
19:45
We estimate to what extent the neutron monitor and stratospheric GCR data can be used
for getting information on the intensity of the GCRs in a so called medium energy
range (100-500 MeV/n), very important for studying the heliosphere and the GCR
modulation there. The hourly data of the neutron monitors Apatity (since 1969) and
Moscow (since 1958) are used as well as the standard set of the qu
... More
Presented by Dr. Mikhail KRAINEV
on
9/7/2007
at
19:45
We evaluate the muon and tau energy loss produced by photonuclear interactions at
high energies by using different theoretical models. The theoretical uncertainty is
estimated by taking different extrapolations of the DIS structure functions in the low and
moderate $Q^2$ range at extremely low values of $x$ where nuclear shadowing
could be stronger than usually thought.
Photonuclear inte
... More
Presented by Gonzalo PARENTE
on
9/7/2007
at
19:45
This paper describes the timing calibration system for the NEMO (NEutrino
Mediterranean Observatory) underwater neutrino telescope. Timing calibration
is a critical task to perform in such a large apparatus, as the track
reconstruction capabilities strongly depend on the accuracy of the time
alignment of the measurements made by the different sensors. A system based
on an optical fibre n
... More
Presented by Dr. Marco CIRCELLA
on
9/7/2007
at
19:45
R&D activities for the Lake Baikal Gigaton Volume (km3) detector have started.
The currently operating Baikal Neutrino Telescope NT200+
gives an excellent oppportunity for physics and technology tests,
since new equipment can easily be installed during yearly
routine telescope maintenance periods.
We describe in-situ longterm tests of new
Hamamatsu and Photonis PMTs (10", 12" and 13")
and o
... More
Presented by et al. WISCHNEWSKI, R.
The two-dimensional solar diurnal variation of the galactic cosmic-ray intensity
is measured in TeV energy range using data taken from Tibet III air shower
array (Nov.1999-Nov.2005). The variation are consistent with the Compton-
Getting anisotropy due to the terrestrial orbital motion around the sun in the
high energy (12TeV) data sample;while an additional variation is observed in
the l
... More
Presented by Dr. Yi ZHANG
on
9/7/2007
at
19:45
The report describes a 4-channel digital device which can be regarded as a
prototype elementary unit for future underwater acoustic neutrino telescopes.
Signals from the hydrophones, arranged in a pyramid-like geometry with 144 cm
spacing between the hydrophones, are amplified and processed by a 16-bit
ADC card with a frequency up to 200 kHz. There are three regimes of operation
of the i
... More
Presented by Dr. Ralf WISCHNEWSKI
on
9/7/2007
at
19:45
In February 2007 the MAGIC Air Cherenkov Telescope for gamma ray
astronomy was fully upgraded with a ultra fast 2GSamples/s digitization system.
Since the gamma ray signals are very short, a fast readout can
minimize the influence of the background from the light of the night sky.
Fast flash analog to digital converters (FADCs) are commercially
available, but they are prohibitively expensiv
... More
Presented by Dr. Florian GOEBEL
on
9/7/2007
at
19:45
The issue of the Dark Matter distribution inside the halos is a
very complicated one.
N-body simulations data, which are usually assumed to represent the dark
matter shape inside the halos, suffer from the bug of flattening the model
to all types of Galaxy, without taking into account the peculiar properties
of each Galaxy.
In this work we extract informations on the Dark Matter distribution
... More
Presented by Dr. Lidia PIERI
on
9/7/2007
at
19:45
The cosmic ray intensity data from Rome neutron monitoring station has been
harmonically analyzed for the period 1976-2004 covering three solar cycles 21,
22 and 23. This analysis is performed for four different groups of days 60QD,
120QD, CQD and AD with statistical errors. During the entire period of
investigation, the amplitude of higher harmonics is low at / near the minima of
each s
... More
Presented by Mrs. Alka JAIN
VERITAS, the Very Energetic Radiation Imaging Telescope Array System, is an array of four 12 m diameter imaging
atmospheric Cherenkov telescopes for gamma-ray astronomy above 100 GeV currently in operation in Arizona. The
VERITAS Collaboration has developed VEGAS, the VERITAS Gamma-ray Analysis Suite, a data-analysis software
package for the processing of single- and multiple-telescope data
... More
Presented by Dr. Peter COGAN
on
9/7/2007
at
19:45
VERITAS employs a multi-stage data acquisition chain that extends from the VME
readout of custom 500 MHz flash ADC electronics to the construction of telescope
events and ultimately the compilation of information from each telescope into array
level data. These systems provide access to the programming of the channel level
triggers and the FADCs. They also ensure the proper synchronization of
... More
Presented by Elizabeth HAYS
on
9/7/2007
at
19:45
With a volume of ~1 km3, IceCube will be able to detect very high energy
neutrinos above ~1E17 eV. At these energies, bremsstrahlung and pair
production are suppressed by the Landau-Pomeranchuk-Migdal effect (LPM).
Therefore, nu_e and nu_tau interactions in the ice can produce several hundred
meter long showers. We present an analysis of IceCube sensitivity to such events. It includes
simulat
... More
Presented by Dr. Julien BOLMONT
on
9/7/2007
at
19:45
We present a design for novel two-mirror aplanatic telescopes for use in
ground-based gamma-ray astronomy. Comparing to a traditional Davies-Cotton
reflector, an aplanatic telescope can achieve significant reduction of plate scale.
The telescope design can be configured to balance the need for wide-field of
view, high angular resolution, large light collecting area, and high degree of
un
... More
Presented by Stephen FEGAN
on
9/7/2007
at
19:45
The joint analysis of experimental data on cosmic ray fluxes measured in the
stratosphere at 1 a.u. and measured by Voyager - 1 spacecraft at the different
distances from the Earth is made. The relationship between cosmic ray fluxes in
the stratosphere and interplanetary magnetic field strength are used to get cosmic
ray flux outside the modulation region. The evaluation of the modulation reg
... More
Presented by Prof. Yuri STOZHKOV
on
9/7/2007
at
19:45
