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Proceedings Paper

Long-range effects of gain depression in microchannel plates
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Paper Abstract

It has been found that the gain depression in MCP's operated at high gains is a relatively long range phenomenon. Active pores can significantly depress the gain in the surrounding quiescent pores at distances of the order of millimeters. This is of fundamental importance for detectors in which high point source count rates are encountered. We have measured this effect for a variety of plate operating conditions and point source count rates and find that in all cases there is a constant limiting radius. We have also determined that the gain depression has a long term effect on the MCP.

Paper Details

Date Published: 8 October 1992
PDF: 12 pages
Proc. SPIE 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, (8 October 1992); doi: 10.1117/12.130690
Show Author Affiliations
Michael L. Edgar, Univ. College London (United Kingdom)
Alan Smith, Univ. College London (United Kingdom)
Jonathan S. Lapington, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 1743:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III
Oswald H. W. Siegmund, Editor(s)

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