Status of the GAMMA-400 project

The preliminary design of the new space gamma-ray telescope GAMMA-400 for the energy range 100 MeV-3 TeV is presented. The angular resolution of the instrument, 1-2 degrees at E-gamma similar to 100 MeV and similar to 0.01 degrees at E-gamma > 100 GeV, its energy resolution similar to 1% at E gamma > 100 GeV, and the proton rejection factor similar to 10(6) are optimized to address a broad range of science topics, such as search for signatures of dark matter, studies of Galactic and extragalactic gamma-ray sources, Galactic and extragalactic diffuse emission, gamma-ray bursts, as well as high-precision measurements of spectra of cosmic-ray electrons, positrons, and nuclei. (c) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.