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Background simulations of WXT aboard the Einstein Probe Mission
Author(s): Donghua Zhao; Chen Zhang; Zhixing Ling; Yulei Qiu; Weimin Yuan; Shuangnan Zhang
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Paper Abstract

The Einstein Probe mission that will be launched in 2022, is dedicated to time-domain high-energy astrophysics. Its primary goals are to discover high-energy transients and to monitor variable objects in 0.5-4 keV energy band. To realize these objectives, EP is equipped with a Wide-filed X-ray Telescope (WXT) which applies the micro-pore optics (MPO). Background is critical for a space X-ray instrument, since it is related to sensitivity and observation data quality. In this work, we study the background components of WXT induced by cosmic X rays, soft X rays from the Galaxy based on ray tracing program. We also investigate the background due to energetic cosmic rays, the count rate of which varies with the thickness of detector sensitive layer. Furthermore, we simulate the contribution of low-energy electrons to the background of WXT, which would degrade the sensitivity notably without electron diverters. The electron diverters for WXT are under development based on simulations.

Paper Details

Date Published: 6 July 2018
PDF: 7 pages
Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106995N (6 July 2018); doi: 10.1117/12.2311914
Show Author Affiliations
Donghua Zhao, National Astronomical Observatories (China)
Chen Zhang, National Astronomical Observatories (China)
Zhixing Ling, National Astronomical Observatories (China)
Yulei Qiu, National Astronomical Observatories (China)
Weimin Yuan, National Astronomical Observatories (China)
Shuangnan Zhang, National Astronomical Observatories (China)
Institute of High Energy Physics (China)

Published in SPIE Proceedings Vol. 10699:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Shouleh Nikzad; Kazuhiro Nakazawa, Editor(s)

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