Simulation of the Wide Field soft gamma-ray Polarimeter in Wide Band X-Ray Polarization and Imaging Telescope
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摘要: X射线及软射线偏振探测能够帮助我们了解致密天体辐射区几何、磁场结构、辐射机制、传播路径上的环境等方面的信息，是进行高能天体物理研究的一种探针。宽波段X射线能谱与偏振望远镜能够实现3~500keV能量范围的偏振测量，预期填补硬X射线及软 射线的高灵敏度偏振探测空白。大视场软 偏振探测仪是该望远镜上的一个重要载荷，其能量覆盖范围为50~500keV，由塑料闪烁体和CsI组成。我们通过使用Geant4对大视场软 偏振探测仪进行了物理模拟，模拟结果显示其探测效率大于15%，最小可测偏振度为8%。
Abstract: Polarization measurements of X-rays and soft gamma rays can reveal the geometry of the emission region, magnetic field structures, radiation mechanisms, and the environment along the propagation path, serving as a probe for astrophysical research. The Wide Band X-ray Polarization and imaging Telescope (WXPT) can perform polarization measurements over 3~500 keV, filling the gap in hard X-ray and soft gamma-ray polarimetry. The wide-field soft gamma-ray polarimeter is an important payload on this telescope, covering 50~500 keV, and is composed of a plastic scintillator and CsI. Using Geant4, we carried out physics simulations of the wide-field soft gamma-ray polarimeter. The results show a detection efficiency greater than 15% and a minimum detectable polarization (MDP) of 8%.
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Key words:
- WXPT /
- soft gamma-ray polarization /
- Geant4 /
- Simulation
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