Separation of electrons and protons in the GAMMA-400 gamma-ray telescope. Issue 7 (1st October 2015)

• Record Type: Journal Article
• Authors: Leonov, A.A.; Galper, A.M.; Bonvicini, V.; Topchiev, N.P.; Adriaini, O.; Aptekar, R.L.; Arkhangelskaja, I.V.; Arkhangelskiy, A.I.; Bergstrom, L.; Berti, E.; Bigongiari, G.; Bobkov, S.G.; Boezio, M.; Bogomolov, E.A.; Bonechi, S.; Bongi, M.; Bottai, S.; Castellini, G.; Cattaneo, P.W.; Cumani, P.; Dedenko, G.L.; De Donato, C.; Dogiel, V.A.; Gorbunov, M.S.; Gusakov, Yu.V.; Hnatyk, B.I.; Kadilin, V.V.; Kaplin, V.A.; Kaplun, A.A.; Kheymits, M.D.; Korepanov, V.E.; Larsson, J.; Loginov, V.A.; Longo, F.; Maestro, P.; Marrocchesi, P.S.; Mikhailov, V.V.; Mocchiutti, E.; Moiseev, A.A.; Mori, N.; Moskalenko, I.V.; Naumov, P.Yu.; Papini, P.; Pearce, M.; Picozza, P.; Rappoldi, A.; Ricciarini, S.; Runtso, M.F.; Ryde, F.; Serdin, O.V.; Sparvoli, R.; Spillantini, P.; Suchkov, S.I.; Taraskin, A.A.; Tavani, M.; Tiberio, A.; Tyurin, E.M.; Ulanov, M.V.; Vacchi, A.; Vannuccini, E.; Vasilyev, G.I.; Yurkin, Yu.T.; Zampa, N.; Zirakashvili, V.N.; Zverev, V.G.;
• Is Part Of: Advances in space research. Volume 56:Issue 7(2015)
• Page Start: 1538
• Page End: 1545
• Publication Date: 2015-10-01
• Subjects: Space sciences -- Periodicals; Astronautics -- Periodicals; Geophysics -- Periodicals; 500.505
• DOI: 10.1016/j.asr.2015.06.040
• Languages: English
• ISSNs: 0273-1177

Abstract

<abstract xml:lang="en" abstract-type="author" id="ab005"> <title id="st005">Abstract</title> <sec> <p id="sp0005">The GAMMA-400 telescope will measure the fluxes of gamma rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. These measurements will allow it to achieve the following scientific objectives: search for signatures of dark matter, investigation of gamma-ray point-like and extended sources, study of the energy spectrum of the Galactic and extragalactic diffuse emission, study of gamma-ray bursts and gamma-ray emission from the active Sun, together with high-precision measurements of the high-energy electrons and positrons spectra, protons and nuclei up to the knee.</p> <p id="sp0010">The bulk of cosmic rays are protons and helium nuclei, whereas the lepton component in the total flux is ∼10⁻³ at high energy. In the present paper, the simulated capability of the GAMMA-400 telescope to distinguish electrons and positrons from protons in cosmic rays is addressed. The individual contribution to the proton rejection from each detector system of GAMMA-400 is studied separately. The use of the combined information from all detectors allows us to reach a proton rejection of the order of ∼4 × 10⁵ for vertical incident particles and ∼3 × 10⁵ for particles with initial inclination of 30° in the electron energy range from 50 GeV to 1 TeV.</p> </sec> </abstract>