Radially uniform electron source

D. McComas, S. J. Bame

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A 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.".

Original languageEnglish (US)
Pages (from-to)1490-1491
Number of pages2
JournalReview of Scientific Instruments
Issue number9
StatePublished - 1982
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation


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