高气压充氙电离室电极结构的优化设计研究

Study on Optimization Design for Anode Structure of the High-Pressure Xenon Chambers

文章首先从理论上分析了共面栅极阳极技术电离室内部电势分布对其能量分辨率的影响;然后采用Ansoft Maxwell3D程序建立了一个高气压充氙电离室灵敏探测体积内静电场的计算模型,分别计算了不同阳极丝数目、半径和位置下电离室内的电势分布;最后分析得出极丝数目、半径及其位置对该电离室能量分辨率的影响规律。结果表明,极丝数目越多,极丝直径越小且其位置距中轴距离越近时,该电离室的能量分辨率将越好。本研究将对相关类型探测器相关指标的优化设计提供参考。

The effect of potential distribution in ionization chamber with coplanar grid anode on its energy resolution was theoretically analyzed first in this paper. , Then a model to calculate the static electric field within a High-Pressure Xenon （HPXe） ionization chamber＇s detecting volume was set up with Maxwell3D software. Using that model the potential distribution in chamber with different number, radius or position of anode was obtained Eventually the influences of anode＇s number, radius and position on the chain-ber＇s energy resolution were studied. The results show that the more number of anode, the smaller radius of anode and the nearer position from chamber＇s mid-axis, the better energy resolution of the ionization chamber could be achieved This study could provide a reference for optimization design of the detectors similar to HPXe ionization chamber.