The GEMS photoelectric x-ray polarimeters
The GEMS photoelectric x-ray polarimeters
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GEMS 光电 X 射线旋光仪
DOI：
10.1117/12.857736
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
J.K. Black;T. Tamagawa;et al.
重力和极磁小型探测器（GEMS）是一个专门用于X射线偏振测量（2-10 keV）的天体物理观测站，正在开发中，将于2014年发射。为了最大限度地提高观测台的偏振灵敏度，GEMS使用了基于光电效应的偏振计，并配备了一个气体微图案时间投影室。我们描述了TPC偏振计的概念和GEMS实现的细节，包括影响最终偏振灵敏度的因素，包括量子效率，调制因子，系统误差和背景。
The Gravity and Extreme Magnetism Small Explorer (GEMS) is an astrophysical observatory dedicated to X-ray polarimetry (2-10 keV) and is being developed for launch in 2014. To maximize the polarization sensitivity of the observatory, GEMS uses polarimeters based on the photoelectric effect with a gas micropattern time projection chamber (TPC). We describe the TPC polarimeter concept and the details of the GEMS implementation, including factors that affect the ultimate polarization sensitivity, including quantum efficiency, modulation factor, systematic errors, and background.