Space γ-observatory GAMMA-400 Current Status and Perspectives

• DOI: 10.1016/j.phpro.2015.09.183
• Publication Date: 2015-11-03T23:35:18Z
• Authors: A.M. Galper; V. Bonvicini; N.P. Topchiev; O. Adriani; R.L. Aptekar; I.V. Arkhangelskaja; A.I. Arkhangelskiy; L. Bergstrom; E. Berti; G. Bigongiari; S.G. Bobkov; M. Boezio; E.A. Bogomolov; S. Bonechi; M. Bongi; S. Bottai; G. Castellini; P.W. Cattaneo; P. Cumani; G.L. Dedenko; C. De Donato; V.A. Dogiel; M.S. Gorbunov; Yu.V. Gusakov; B.I. Hnatyk; V.V. Kadilin; V.A. Kaplin; A.A. Kaplun; M.D. Kheymits; V.E. Korepanov; J. Larsson; A.A. Leonov; V.A. Loginov; F. Longo; P. Maestro; P.S. Marrocchesi; V.V. Mikhailov; E. Mocchiutti; A.A. Moiseev; N. Mori; I.V. Moskalenko; P.Yu. Naumov; P. Papini; M. Pearce; P. Picozza; A. Rappoldi; S. Ricciarini; M.F. Runtso; F. Ryde; O.V. Serdin; R. Sparvoli; P. Spillantini; S.I. Suchkov; M. Tavani; A.A. Taraskin; A. Tiberio; E.M. Tyurin; M.V. Ulanov; A. Vacchi; E. Vannuccini; G.I. Vasilyev; Yu.T. Yurkin; N. Zampa; V.N. Zirakashvili; V.G. Zverev
• Keywords: Calorimeter (particle physics); Aperture (computer memory)

GAMMA-400 γ-ray telescope is designed to measure fluxes of γ-rays and the electron–positron cosmic ray component possibly generated in annihilation or decay dark matter particles; search for study detail discrete sources, examine energy spectra Galactic extragalactic diffuse γ-rays, bursts from active Sun. consists plastic scintillation anticoincidence top lateral detectors, converter-tracker, detectors time-of-flight system (TOF), two-part calorimeter (CC1 CC2), calorimeter, neutron detector. The converter-tracker 13 layers double (x, y) silicon strip coordinate (pitch 0.08 mm). first three final one are without tungsten while middle nine interleaved with conversion foils. thickness CC1 CC2 2 X0 (0.1λ0) 23 (1.1λ0) respectively (where radiation length λ0 nuclear interaction one). total 25 1.2λ0 vertical incident particles registration 54 2.5λ0 laterally ones. range electrons (positrons) main aperture ∼0.1 GeV ∼3.0 TeV. angular resolutions ∼0.01 ∼1% 102 γ-quanta, proton rejection factor ∼5×105. provide down ∼20 MeV aperture. Also this allows investigating high light nuclei characteristics. Electrons, positrons, gamma-quanta will also register directions due special configuration. Lateral resolution same as electrons, E>1.0 GeV. But using it possible detect low-energy gammas ranges 0.2 − 10 – 1.0 8% 2% correspondingly accordingly "Technical Project" stage results. Angular provides only non-stationary events (GRB, solar flares so on) segments count rate analysis. be installed onboard Russian Space Observatory GAMMA-400. lifetime space observatory at least seven years. launch scheduled early 2020s.