GEANT modeling of the low-earth-orbit cosmic-ray background for the Astro-E2 XRS instrument

Tarek Saab; Ryuichi Fujimoto; Caroline A. Kilbourne; Richard L. Kelley

doi:10.1117/12.551945

29 September 2004 GEANT modeling of the low-earth-orbit cosmic-ray background for the Astro-E2 XRS instrument

Tarek Saab, Ryuichi Fujimoto, Caroline A. Kilbourne, Richard L. Kelley

Proceedings Volume 5501, High-Energy Detectors in Astronomy; (2004) https://doi.org/10.1117/12.551945
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

Over the last year a GEANT model of the Astro-E2 XRS instrument (including the surrounding structure of the telescope) has been developed in order to determine the rate and energy spectrum of background events due to cosmic ray protons. Background events, in the x-ray signal energy band, can be caused by the primary protons themselves, secondaries which are created in the material surrounding the XRS, or by decays of nearby activated materials. This paper will present the details of the GEANT model and will discuss the effectiveness of the telescope structure in shielding the XRS instrument and efficiency of the anti-coincidence detector at further reducing the background rate. We will also present an investigation of the rate and spectrum of cosmic ray particles passing through the Si frame, which acts as a mechanical support and thermal sink to the x-ray pixels, in order to determine whether sufficient heating will occur in the Si frame to affect the response of the x-ray pixels.

Citation Download Citation

Tarek Saab, Ryuichi Fujimoto, Caroline A. Kilbourne, and Richard L. Kelley "GEANT modeling of the low-earth-orbit cosmic-ray background for the Astro-E2 XRS instrument", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); https://doi.org/10.1117/12.551945

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