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26 April 2024

» arxiv » 1210.1365

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Status of the SPHERE experiment
R. A. Antonov ; S. P. Beschapov ; E. A. Bonvech ; D. V. Chernov ; T. A. Dzhatdoev ; Mir. Finger ; M. Finger ; V. I. Galkin ; N. N. Kabanova ; A. S. Petkun ; D. A. Podgrudkov ; T. M. Roganova ; S. B. Shaulov ; T. I. Sysoeva ;
Date:	4 Oct 2012
Abstract:	Here is presented the current state of the SPHERE-2 balloon-borne experiment. The detector is elevated up to 1 km above the snow surface and registers the reflected Vavilov-Cherenkov radiation from extensive air showers. This method has good sensitivity to the mass-composition of the primary cosmic rays due to its high resolution near the shower axis. The detector consists of a 1500 mm spherical mirror with a 109 PMT cluster in its focus. The electronics record a signal pulse profile in each PMT. In the last 2 years the detector was upgraded: time resolution of pulse registration was enhanced up to 12.5 ns, channel sensitivity was increased by a factor of 3, a new LED-based relative PMT calibration method was introduced, and new hardware and etc. was installed.
Source:	arXiv, 1210.1365
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