THE GAIN, TEMPORAL RESOLUTION AND MAGNETIC-FIELD IMMUNITY OF MICROCHANNEL PLATES

被引:38
作者
FRASER, GW
机构
[1] X-ray Astronomy Group, Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH England, University Road
关键词
D O I
10.1016/0168-9002(90)90009-U
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The variation of microchannel plate (MCP) pulse gain, pulse transit time and transit time spread with channel diameter and length-to-diameter ratio is described, using a variable-spacing dynode model of the electron avalanche which accounts for the effects of wall charge saturation. The analysis includes a description of the response of a single microchannel to the prompt arrival of N electrons, thus providing a microscopic basis for the empirical laws currently used to describe the gain of two- or three-stage MCP multipliers. Preliminary results of microchannel plate gain fatigue "lifetests" conducted in software are described. Finally, an expression is derived for the gain of a microchannel plate, as a function of bias voltage, in the presence of a strong axial magnetic field. Here, as throughout the paper, the results of calculation are compared with experiment. © 1990.
引用
收藏
页码:595 / 606
页数:12
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