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Proceedings Paper

Ray tracing simulations for the wide-field x-ray telescope of the Einstein Probe mission based on Geant4 and XRTG4
Author(s): Donghua Zhao; Chen Zhang; Weimin Yuan; Richard Willingale; Zhixing Ling; Hua Feng; Hong Li; Jianfeng Ji; Wenxin Wang; Shuangnan Zhang
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Paper Abstract

Einstein Probe (EP) is a proposed small scientific satellite dedicated to time-domain astrophysics working in the soft X-ray band. It will discover transients and monitor variable objects in 0.5-4 keV, for which it will employ a very large instantaneous field-of-view (60° × 60°), along with moderate spatial resolution (FWHM ∼ 5 arcmin). Its wide-field imaging capability will be achieved by using established technology in novel lobster-eye optics. In this paper, we present Monte-Carlo simulations for the focusing capabilities of EP’s Wide-field X-ray Telescope (WXT). The simulations are performed using Geant4 with an X-ray tracer which was developed by cosine ( to trace X-rays. Our work is the first step toward building a comprehensive model with which the design of the X-ray optics and the ultimate sensitivity of the instrument can be optimized by simulating the X-ray tracing and radiation environment of the system, including the focal plane detector and the shielding at the same time.

Paper Details

Date Published: 24 July 2014
PDF: 8 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91444E (24 July 2014); doi: 10.1117/12.2055434
Show Author Affiliations
Donghua Zhao, National Astronomical Observatories (China)
Chen Zhang, National Astronomical Observatories (China)
Weimin Yuan, National Astronomical Observatories (China)
Richard Willingale, Univ. of Leicester (United Kingdom)
Zhixing Ling, National Astronomical Observatories (China)
Hua Feng, Tsinghua Univ. (China)
Hong Li, Tsinghua Univ. (China)
Jianfeng Ji, Tsinghua Univ. (China)
Wenxin Wang, Tsinghua Univ. (China)
Shuangnan Zhang, National Astronomical Observatories (China)
Institute of High Energy Physics (China)

Published in SPIE Proceedings Vol. 9144:
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz, Editor(s)

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