Avalanche-ion back-flow reduction in gaseous electron multipliers based on GEM/MHSP

被引：30
作者：
Maia, JM
Mörmann, D
Breskin, A
Chechik, R
Veloso, JFCA
dos Santos, JMF
机构：
[1] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel
[2] Univ Coimbra, Dept Phys, P-3004516 Coimbra, Portugal
[3] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 523卷 / 03期
基金：
以色列科学基金会;
关键词：
gas avalanche electron multipliers; gaseous photomultipliers; ion back-flow; GEM; MHSP;
D O I：
10.1016/j.nima.2003.12.017
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We report on avalanche-ion back-flow measurements in the novel Micro-Hole and Strip-Plate (MHSP) multiplier and in gaseous photomultipliers comprising Gas Electron Multipliers (GEMs) followed by an MHSP. In a 3-GEMs/ MHSP photomultiplier with reflective photocathode, avalanche-ion back-flow fraction of similar to7% and similar to2% were recorded for respective effective gains of 10(7) and 10(6), in Ar/CH4 (95/5) at 760Torr. This is about one order of magnitude reduction in ion back-flow compared to the best values measured in 4-GEMs photomultiplier at the same gain. We describe the mode of operation of the MHSP and explain its ion back-flow reduction features. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：334 / 344
页数：11
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