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Radially uniform electron sourceA thermionic electron source capable of producing uniform count rates in a number of channel electron multipliers simultaneously was required for conditioning multipliers for an extended space mission. It was found that a straight tungsten filament in the center of a cylindrically symmetric geometry surrounded by an array of multipliers emits a radially asymmetric distribution of electrons that changes with time. A source was developed which successfully produces a time-independent radially uniform distribution of electrons by moving the filament out of the direct line of sight and replacing it with a centrally located electron 'cloud.'
Document ID
19820062890
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mccomas, D.
(Los Alamos Scientific Lab. NM, United States)
Bame, S. J.
(Los Alamos National Laboratory Los Alamos, NM, United States)
Date Acquired
August 10, 2013
Publication Date
September 1, 1982
Publication Information
Publication: Review of Scientific Instruments
Volume: 53
Subject Category
Electronics And Electrical Engineering
Accession Number
82A46425
Funding Number(s)
CONTRACT_GRANT: NASA ORDER W-14496
Distribution Limits
Public
Copyright
Other

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