Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
HE 1.1.A
Place
Location: Merida, Mexico
Room: Yucatan II+III+IV (Fiesta Americana)
Date:
from 6 Jul 11:45 to 9 Jul 11:06
Timetable | Contribution List
Displaying 11
contributions
out of
11
Air showers accompanied by high energy atmospheric families observed by Chacaltaya hybrid experiment
Characteristics of air-showers and accompanied high energy atmospheric families
detected in the hybrid experiment at Mt. Chacaltaya are studied in detail and
compared with those of simulations taking into accounts the specific detection bias
of the experiment. It is shown that the observed characteristics of the atmospheric
families accompanied by large air showers, Ne > 10^7, and also
those
... More
Presented by Dr. Masanobu TAMADA
on
9/7/2007
at
13:42
Cosmic rays with energies between 10^16.5 and 10^18.5 eV exhibit a rich range
of features. The energy spectrum changes index at at least two points, known
as the "second knee" and the "ankle". There appears to be a composition change
in this energy regime as well, which may indicate a shift in predominance from
galactic to extragalactic sources. The Telescope Array Low-Energy Extension -
... More
Presented by Prof. John BELZ
on
9/7/2007
at
14:42
The values of the spectral indices of the cosmic ions below the knee energy
band are of notable importance for a quantitative account of the characteristic
of the knee and the ankle of the differential energy spectrum of the cosmic
radiation. Present available measurements of proton and helium spectral
indices below the knee energy interval from a variety of experiments are
examined. Acc
... More
Presented by Dr. Antonio CODINO
on
6/7/2007
at
16:45
Gamma-families were sampled for Pamir altitude (600g/cm2) by MC0 model with
PCR spectra and composition proposed by KASCADE. Comparison of the
calculated and Pamir experimental data on the gamma-families characteristics
( energy spectra of particles, summary energy spectra of particles and intensity
of families) shows contradiction between them
Presented by Dr. V.G. DENISOVA
on
9/7/2007
at
15:30
With the present size of the IceTop air shower array it is possible to measure an
energy spectrum in the range of 1 PeV to 100 PeV. To do so, a lateral pulse height
fit was performed on all analysed showers. Therefore it is crucial to have a
realistic parametrisation of the expected lateral distribution and the corresponding
fluctuations of the measured tank signals. Since IceTop tanks do not
... More
Presented by Mr. Stefan KLEPSER
on
9/7/2007
at
15:54
We have measured the primary cosmic ray spectra of various nuclear groups
by analyzing the relationship between muon multiplicity distribution
and air shower size, and we have also estimated their mean mass as a function
of primary energy. The shower data were obtained from the four years of
observations with the GRAPES-3 air shower experiment, which has a
high-density air shower array o
... More
Presented by Dr. Hideki TANAKA
on
9/7/2007
at
14:06
We confirm the result obtained many years ago at Tien-Shan mountain station
with the large 36-m^2 lead calorimeter, that in extensive air showers (EAS)
with energies of few PeV the attenuation of core energy deposit in lead
becomes slower than it is predicted by modern codes. To study the
absorption of EAS hadrons and muons in a lead ionization calorimeter, the EAS
development in
... More
Presented by Prof. Liubov SVESHNIKOVA
The chemical composition of primary cosmic rays in the energy range ~10^15
eV are going to be examined from muon energy spectra using the AIRES
simulation program. The muon energy spectra observed by the compact
extensive air shower array and the solid iron magnet spectrometer are
compared with simulation result.
Presented by Mr. Hiroki MATSUMOTO
on
9/7/2007
at
15:42
The study of the evolution of the cosmic ray anisotropy over primary energy in the range 10^14-10^15 eV
can provide a significant tool for the understanding of the knee in the primary spectrum.
The EAS-TOP result obtained at Eo ~ 10^14 eV has been extended to higher energies in order to approach
the knee region, by exploiting the full data set (about 10 years of data taking).
Results derived
... More
Presented by Prof. - THE EAS-TOP COLLABORATION
on
9/7/2007
at
13:30
Earlier we proposed that the steepening of the energy spectrum of primary
cosmic rays beyond the knee could be due to the mass distribution of
progenitors of cosmic ray source. Here we have shown that the proposal works
well if cosmic rays of energies below the ankle of the spectrum are accelerated
in a single type of source by ultra relativistic shock waves.
Presented by Dr. Arunava BHADRA
The proton-air inelastic cross section at sqrt(s) approximately 2 TeV has been
obtained from the EAS-TOP Extensive Air Shower experiment data.
The absorption length of cosmic ray proton primaries cascades is studied in the
energy range just below the knee of the primary spectrum. Primary energies are
selected through the EAS muon contents while proton originated cascades at maximum
develop
... More
Presented by Dr. Gian Carlo TRINCHERO
on
9/7/2007
at
14:18
