论文标题
在10-30 KEV的基于XE的X射线偏光仪的模拟
Simulation of a Xe-based X-ray Polarimeter at 10-30 keV
论文作者
论文摘要
X射线的极化检测是天体物理观察的不可忽略的话题。许多极化检测方法已经在低于10〜KEV的能量范围内的X射线进行了很好的开发，而在10-30〜KEV处的检测很少被讨论。本文介绍了基于XE的气体像素检测器的模拟研究，该研究可以在10-30〜KEV处实现X射线的极化检测。为了验证光电子的发射角分布，研究了Geant4中不同的电磁模型。在进行必要的修改后，通过考虑采样发射角的缺失因子，可以实现良好的一致性。此外，讨论了20〜KEV偏振光子的检测能力，调制因子可能为43 \％。
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\%.
