GEM氖氙惰性气体增益特性的模拟研究  

Simulation of Gain Characteristics of Gas Electron Multiplier Operating in Neon and Xenon Gases

作　　者：杨兰兰[1] 屠彦[1] 张盼盼[1] 马善乐[1] 占建英[1] 张玮[2] 

机构地区：[1]东南大学电子科学与工程学院,南京210096 [2]深圳华星光电技术有限公司,深圳518132

出　　处：《真空科学与技术学报》2013年第4期326-330,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金资助项目(50907009;60871015);国家863(2008AA03A308)

摘　　要：采用粒子-蒙特卡罗模型对气体电子倍增器工作在轻惰性气体Ne和重惰性气体Xe中的倍增过程和增益特性进行了比较研究。研究结果表明,轻惰性气体Ne较重惰性气体Xe具有更高的时间分辨率,更高的有效探测效率。但在1个大气压的工作条件下轻惰性气体Ne较易放电使得工作电压降低,从而能达到的最大增益较Xe低,更高气压下的工作机理还需进一步的研究。The characteristics of the gas electron multiplier operating in neon and xenon gases were physically sim- plified and analytically simulated based on a particle-in-cell Monte Carlo collision（ PIC-MCC）model. The impacts of the operating conditions, including the mass number of the noble gas, pressure, and operating voltage, on its gain and stability were calculated. The results show that the atomic mass of the noble gas strongly affects the gain. For example, Ne（20.17） outperforms Xe（131.3）, with higher time resolution, and better detection efficiency. Interesting finding was that at l atm, the maximum gain in Ne gas was lower than that in Xe gas. The possible mechanisms responsible for gas electron multipli- cation at higher pressure need further study.

关 键 词：气体电子倍增器 粒子-蒙特卡罗模型 纯惰性气体 电子倍增 增益 

分 类 号：TE811[石油与天然气工程—油气储运工程]