Measurement of the low-energy charged particle background with the space detector HEPD

Abstract

Spaceborne gamma-ray telescopes are operated within a dominant background of charged particles, mainly primary cosmic rays and Earth albedo particles. Dedicated anti-coincidence devices and on-board rejection techniques are needed to reject this background, as well as the best available background models. The high-energy particle detector (HEPD) is a space detector for high-energy particles, which can identify electrons, protons and light nuclei in the energy range from few MeV to many hundreds of MeV, and measure their fluxes. It consists of a high-precision silicon tracker, a versatile trigger system, a range calorimeter, and an anti-coincidence system. HEPD will extend PAMELA and the AMS-02 measurements to lower energies and characterize the orbital radiation environment, then providing very useful data for the future gamma-ray mission development, especially for the optimization of the on-board background rejection.

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Correspondence to Vincenzo Vitale.

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This paper is the peer-reviewed version of a contribution selected among those presented at the Conference on Gamma-Ray Astrophysics with the AGILE Satellite held at Accademia Nazionale dei Lincei and Agenzia Spaziale Italiana, Rome, during December 11–13, 2017.

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Vitale, V., for the CSES-Limadou Collaboration. Measurement of the low-energy charged particle background with the space detector HEPD. Rend. Fis. Acc. Lincei 30, 277–280 (2019). https://doi.org/10.1007/s12210-019-00837-1

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Keywords

  • Space detector
  • Charged particle background