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arXiv 2201.11461astro-ph.IMphysics.ins-det
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10-30 keV的Xe基X射线偏振计的模拟

Simulation of a Xe-based X-ray Polarimeter at 10-30 keV

Jin Zhang, Xinchen Cai, Yongbo Huang, Qian Liu, Fei Xie, Jin Li, Hong-Bang Liu

摘要:

X射线偏振探测是天体物理观测中一个不可忽视的课题。对于能量在10~keV以下的X射线,已经有许多偏振探测方法,而对于能量在10-30~keV的X射线,偏振探测方法还很少被讨论。本文对一种能实现10-30 keV X射线偏振探测的X射线气体像素探测器进行了模拟研究。为了验证光电子的发射角分布,研究了Geant 4中的不同电磁模型。在对发射角进行采样时考虑缺失因子进行必要的修正后,可以实现良好的一致性。此外,还讨论了20 keV偏振光的探测能力,其调制因子可达43%.

英文摘要:

Polarization detection of X-rays is a non-negligible topic to astrophysical observation. Many polarization detection methods have been well developed for X-rays in the energy range below 10~keV, while the detection at 10-30~keV is rarely discussed. This paper presents a simulation study of a Xe-based gas pixel detector, which can achieve the polarization detection of X-rays at 10-30~keV. To verify the emission angle distribution of photoelectrons, different electromagnetic models in Geant4 were investigated. After a necessary modification by considering the missing factor when sampling the emission angle, a good agreement can be achieved. Moreover, the detection capability of 20~keV polarized photons was discussed and the modulation factor could be 43\%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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