학술논문
A technique for selecting γ rays with energies above 50 GeV from the background of charged particles in the GAMMA-400 space-based γ-ray telescope.
Document Type
Article
Author
Source
Subject
*GAMMA ray telescopes
*COSMIC rays
*SIGNAL detection
*CHARGED particle accelerators
*ELECTROMAGNETIC devices
*PHYSICS research
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Language
ISSN
0020-4412
Abstract
The task of selecting neutral γ rays from the background of charged particle fluxes, which arises in investigation of high-energy (>50 GeV) cosmic rays, is complicated by the presence of the backsplash effect. The backsplash is composed of a great number of low-energy (~1 MeV) particles produced in an electromagnetic shower being developed in the calorimeter of the γ-ray telescope. A technique of charged particle rejection using an anticoincidence system has been developed. A method for discriminating events of charged particle detection from γ-ray detection events accompanied by the backsplash phenomenon is proposed. This method is based on the difference of the signals in time and makes it possible to maintain a high detection efficiency even for high-energy γ rays. [ABSTRACT FROM AUTHOR]