X-ray polarimetry with a conventional gas proportional counter through rise-time analysis
X-ray polarimetry with a conventional gas proportional counter through rise-time analysis
复制标题
使用传统气体正比计数器通过上升时间分析进行 X 射线偏振测定
DOI：
10.1016/s0168-9002(98)01145-0
复制
发表时间：
1999
影响因子：
1.4
通讯作者：
K. Tamura
中科院分区：
文献类型：
--
作者：
K. Hayashida;N. Miura;H. Tsunemi;K. Torii;H. Murakami;Y. Ohno;K. Tamura
利用能量为10~40keV的同步辐射偏振X射线束，对Xe气体正比计数器的信号上升时间进行了实验研究。当对阳极垂直于入射X射线光子的电矢量时，平均上升时间明显长于平行情况。这表明传统的气体正比计数器在X射线偏振测量中是有用的。这种上升时间偏振仪的调制对比度适中(10keV X射线M=0.1，40keV X射线M=0.35)，具有同时测量X射线能量和计时的能力，将在X射线天文学和其他领域中应用。
We have performed an experiment on the signal rise time of a Xe gas proportional counter using a polarized X-ray beam of synchrotron orbital radiation with energies from 10 to 40keV. When the counter anode is perpendicular to the electric vector of the incident X-ray photons, the average rise time becomes significantly longer than that for the parallel case. This indicates that the conventional gas proportional counters are useful for X-ray polarimetry. The moderate modulation contrast of this rise-time polarimeter (M=0.1 for 10keV X-rays and M=0.35 for 40keV X-rays), with capability of the simultaneous measuring X-ray energies and the timing, would be useful for applications in X-ray astronomy and in other fields.