THE SPATIAL EXTENT OF GAIN DEPRESSION FOR MCP-BASED PHOTON DETECTORS

被引：13

作者：

EDGAR, ML

LAPINGTON, JS

SMITH, A

机构：

[1] Mullard Space Science Laboratory, Department of Physics and Astronomy, University College London, Dorking

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1992年 / 63卷 / 01期

关键词：

D O I：

10.1063/1.1143818

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We describe a technique to measure the spatial extent and magnitude of gain depression in the quiescent pores surrounding an active region of an MCP and present preliminary results. We find that significant gain depression occurs up to 1.5 mm from the center of the active region. The magnitude of the reduction in gain decreases linearly with radius and is proportional to the count rate. We evaluate two possible mechanisms for gain depression. We find that the pore deactivating model in which the electric field from the discharging of a pore distorts the electric fields in surrounding pores is more successful than the transfer of charge from quiescent pores.

引用

页码：816 / 819

页数：4

共 12 条

[1]

ANACKER DC, 1991, REV SCI INSTRUM, V62, P1247

[2] AN OPERATIONAL MODEL FOR MICROCHANNEL PLATE DEVICES [J].