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Microchannel plate modal gain variations with temperatureMeasurements of the modal gain of two high-gain curved-channel microchannel plates (MCPs) at various operating temperatures are presented. Both MCPs were fabricated from the Long Life glass with 12-micron diam channels on 15-micron centers. The modal gain was found to decrease with increasing temperature at a rate of -0.1 percent C. This reduction of gain with temperature is attributed primarily to an axial temperature gradient along each MCP channel creating a nonuniform electric field within the channel that lowers the effective output gain. A lowering of the secondary electron yield resulting from increased phonon scattering of secondary electrons released within the walls of the MCP channels was assessed, but was found to have a negligible contribution to the drop in gain with temperature.
Document ID
19930043548
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Slater, David C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Timothy, J. G.
(Stanford Univ. CA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Review of Scientific Instruments
Volume: 64
Issue: 2
ISSN: 0034-6748
Subject Category
Instrumentation And Photography
Accession Number
93A27545
Funding Number(s)
CONTRACT_GRANT: NAS5-30387
CONTRACT_GRANT: NAS5-29389
Distribution Limits
Public
Copyright
Other

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