Micromegas探测器的电子透过率与增益  

Electron collection efficiency and gain of Micromegas

作　　者：郭军军[1] 管亮[1] 唐浩辉[1] 汪晓莲[1] 许咨宗[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《中国科学技术大学学报》2010年第6期599-603,共5页JUSTC

基　　金：国家自然科学基金(10775132)资助

摘　　要：介绍了以鱼线作为放大区(雪崩区)支撑柱的Micromegas探测器,探测器灵敏面积为45mm×45mm.给出了该探测器的增益均匀性、电子透过率以及不同气体成分下的增益曲线,并与三维蒙特卡罗模拟结果进行比较.分析讨论了Micromegas工作机理和增益增加的原因等.A prototype Micromegas detector with a sensitive area of 45 mm×45 mm and a fishing line separated amplification （avalanche） gap was introduced. The electron collection efficiency and gas gain variation with the mesh voltage in different gas mixtures were presented. 3D simulations using Monte Carlo methods have also been done and shown good agreement with experimental data. The operation mechanism of Micromegas and the reason for the gain incensement were discussed.

关 键 词：均匀性 透过率 增益 彭宁效应 对比 

分 类 号：O572.212[理学—粒子物理与原子核物理]