The GAMMA-400 gamma-ray telescope characteristics. Angular resolution and electrons/protons separation

TL;DR

The GAMMA-400 telescope is designed to measure gamma-ray fluxes and cosmic-ray particles with high precision, enabling advanced studies of dark matter, gamma-ray sources, and cosmic-ray spectra, with improved angular resolution and particle separation capabilities.

Contribution

This paper presents the design characteristics, reconstruction methods, and particle separation capabilities of the GAMMA-400 gamma-ray telescope, highlighting its improvements over previous instruments.

Findings

Energy resolution > 100 GeV is ~1%

Angular resolution better than 0.02 degrees

Effective electron/proton separation capability

Abstract

The measurements of gamma-ray fluxes and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV, which will be implemented by the specially designed GAMMA-400 gamma-ray telescope, concern with the following broad range of science topics. Searching for signatures of dark matter, surveying the celestial sphere in order to study gamma-ray point and extended sources, measuring the energy spectra of Galactic and extragalactic diffuse gamma-ray emission, studying gamma-ray bursts and gamma-ray emission from the Sun, as well as high precision measuring spectra of high-energy electrons and positrons, protons and nuclei up to the knee. To clarify these scientific problems with the new experimental data the GAMMA-400 gamma-ray telescope possesses unique physical characteristics comparing with previous and present experiments. For gamma-ray energies more than 100 GeV GAMMA-400 provides the energy resolution of ~1% and angular resolution better than 0.02 deg. The methods developed to reconstruct the direction of incident gamma photon are presented in this paper, as well as, the capability of the GAMMA-400 gamma-ray telescope to distinguish electrons and positrons from protons in cosmic rays is investigated.