A new coplanar-grid high-pressure xenon gamma-ray spectrometer
A new coplanar-grid high-pressure xenon gamma-ray spectrometer
复制标题
新型共面栅极高压氙伽马射线能谱仪
DOI：
10.1109/tns.2005.862804
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发表时间：
2004
影响因子：
1.8
通讯作者：
G. Tepper
中科院分区：
文献类型：
--
作者：
S. Kiff;Zhong He;G. Tepper
高压氙气(HPXe)由于其原子序数大、密度高、产生电子-离子对的平均能量低以及能够制造大探测体积的器件，是一种理想的辐射探测介质。虽然HPXe过去的工作已经产生了相对成功的探测器，其能量分辨率为662keV，高达约2%的半高宽，但这些电离室在现场运行时的预期限制是由于其Frisch栅格的振动而导致分辨率下降。本文件报告了无Frisch栅格探测器的进展；预计拟议的阳极设计将提供具有竞争力的能量分辨率，并将机械振动造成的退化降至最低。考虑了载流子统计、阳极上感应电荷随相互作用位置的变化以及电子噪声的模拟预测，在662keV处最好的能量分辨率为2.3%半高宽。将实验数据与这些模拟结果进行了比较
High-pressure xenon (HPXe) gas is a desirable radiation detection medium for many reasons, including its large atomic number, high density, low mean energy to produce an electron-ion pair, and the ability to produce devices with large detection volumes. While past work in HPXe has produced relatively successful detectors with energy resolution at 662 keV as good as approximately 2% FWHM, an expected limitation of these chambers in field operation is resolution degradation due to the vibration of their Frisch grids. Progress on a detector without a Frisch grid is reported in this submission; it is expected that the proposed anode design will provide competitive energy resolution with minimal degradation from mechanical vibration. Simulations accounting for charge carrier statistics, changes in the charge induced on the anode as a function of interaction location, and electronic noise predict a best-case energy resolution of 2.3% FWHM at 662 keV. Experimental data is compared with these simulations