118 research outputs found
Results and prospects on registration of reflected Cherenkov light of EAS from cosmic particles above 10^{15} eV
We give an overview of the SPHERE experiment based on detection of reflected
Vavilov-Cherenkov radiation (Cherenkov light) from extensive air showers in the
energy region E>10^{15} eV. A brief history of the reflected Cherenkov light
technique is given; the observations carried out with the SPHERE-2 detector are
summarized; the methods of the experimental datasample analysis are described.
The first results on the primary cosmic ray all-nuclei energy spectrum and mass
composition are presented. Finally, the prospects of the SPHERE experiment and
the reflected Cherenkov light technique are given.Comment: 4 pages, 3 figures, Proc. PANIC-201
The use of the Cherenkov radiation and the fluorescence light to calibrate the energy of giant air showers
In terms of the quark-gluon string model the analysis of the classic
procedure to estimate the energy of giant air showers with help of the
parameter s(600) (a density of energy deposition in the scintillator at a
distance of 600 m from the shower core) have been carried out. Simulations of
the signal s(600) with help of the CORSIKA code in terms of the hybrid scheme
show energy estimates which are approximately a factor of 1.6 times lower than
adopted at the Yakutsk array. The energy estimates calculated with the help of
the Cherenkov radiation coincide with the experimental data. Simulations of
deposited energy distributions in the atmosphere with help of the GEANT4 code
and the CORSIKA code show that more than 20% of this energy may be deposited at
distances above 100 m from the shower axis.Comment: 10 pages, 5 figure
- …