24 July 2014 Ray tracing simulations for the wide-field x-ray telescope of the Einstein Probe mission based on Geant4 and XRTG4
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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 (http://cosine.nl/) 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.
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Donghua Zhao, Donghua Zhao, Chen Zhang, Chen Zhang, Weimin Yuan, Weimin Yuan, Richard Willingale, Richard Willingale, Zhixing Ling, Zhixing Ling, Hua Feng, Hua Feng, Hong Li, Hong Li, Jianfeng Ji, Jianfeng Ji, Wenxin Wang, Wenxin Wang, Shuangnan Zhang, Shuangnan Zhang, } "Ray tracing simulations for the wide-field x-ray telescope of the Einstein Probe mission based on Geant4 and XRTG4", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91444E (24 July 2014); doi: 10.1117/12.2055434; https://doi.org/10.1117/12.2055434
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