GEM电极的三维电场分布计算  

Three Dimension Distribution of Electric Field in GEM Gas Detectors

作　　者：周意[1] 李澄[1] 安少辉[1] 许咨宗[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230027

出　　处：《高能物理与核物理》2004年第3期299-303,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 0 75 0 45 )资助~~

摘　　要：基于有限元方法对GEM电极的电场分布进行模拟和计算 ,得到了完整的三维电场分布 .研究不同几何构型的GEM场强分布对电荷收集效率的影响 ,给出了 4种构型GEM电极的电场线透过率分别为 :双倒锥型 33.12 % ;圆柱型 34.85 % ;单锥型 4 0 .70 % ;单倒锥型 16 .70 % .The 3D distribution of electric field in GEM (Gas Electron Multiplier) electrode is calculated based on the finite element method. The transmissivity of electric field lines in four types of GEM are obtained, these are 33.12%,34 85%,40.70%, and 16.70% for double-conical, cylindrical, single-conical and inverse-conical electrodes respectively. The three dimensional calculation of electric field in GEM agrees with the experimental data better than the two dimensional calculation.

关 键 词：气体电子倍增器 电场分布 电荷收集效率 有限元理论 GEM电极 场强分布 电场线透过率 

分 类 号：O4-33[理学—物理]