Detection of UV Radiation from Extensive Air Showers: Prospects for Cherenkov Gamma-Ray Astronomy

Autor:	F. A. Aharonyan, G. I. Vasiliev, A. V. Nikolaev, E. E. Kholupenko, P. N. Aruev, V. V. Zabrodskii, Andrei M. Bykov, A. M. Krassilchtchikov
Rok vydání:	2018
Předmět:	010302 applied physics Physics Photomultiplier Physics and Astronomy (miscellaneous) Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Gamma ray Astronomy Cosmic ray Astrophysics::Cosmology and Extragalactic Astrophysics Gamma-ray astronomy Radiation 01 natural sciences law.invention Telescope law Observatory 0103 physical sciences 010303 astronomy & astrophysics Cherenkov radiation
Zdroj:	Technical Physics. 63:1603-1614
ISSN:	1090-6525 1063-7842
DOI:	10.1134/s1063784218110154
Popis:	Cherenkov emission of extensive air showers (EAS) from cosmic gamma rays and cosmic-ray protons has been modelled. Spectral density of such emission in the 240–700 nm band has been determined for 3 GeV–10 TeV primaries of both sorts. It has been shown that the ratio of EAS Cherenkov emission fluxes in the optical and ultraviolet (UV) bands substantially depends on the sort of the primary, so the ratio can be employed to select gamma-ray events from the background produced by cosmic rays. Detection of EAS Cherenkov emission with specialized silicon photomultipliers sensitive in the UV band would allow one to substantially extend the duty cycle of a Cherenkov gamma-ray telescope, as it would be possible to observe the showers during moonlit nights. The UV-sensitive silicon photomultipliers developed at the Ioffe Institute would allow to detect gamma-ray-induced EAS at the Cherenkov gamma-ray observatory ALEGRO over a threshold of about 40 GeV at 5 km above sea level and about 80 GeV at 2 km above sea level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d253818149ba21382753be74fabc5ea7 https://doi.org/10.1134/s1063784218110154 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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