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

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• 作者：M. D. Kheymits ; A. M. Galper…
• 刊名：Instruments and Experimental Techniques
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：59
• 期：4
• 页码：508-512
• 全文大小：756 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Measurement Science and Instrumentation
  Electronic and Computer Engineering
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3180
• 卷排序：59

文摘

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.Original Russian Text © M.D. Kheymits, A.M. Galper, I.V. Arkhangelskaja, A.I. Arkhangelskiy, Yu.V. Gusakov, V.G. Zverev, V.V. Kadilin, V.A. Kaplin, A.A. Leonov, P.Yu. Naumov, M.F. Runtso, S.I. Suchkov, N.P. Topchiev, Yu.T. Yurkin, 2016, published in Pribory i Tekhnika Eksperimenta, 2016, No. 4, pp. 27–31.