Superthermal electron distribution measurements from polarized electron cyclotron emission (invited)

T. C. Luce, P. C. Efthimion, Nathaniel J. Fisch

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Measurements of the superthermal electron distribution can be made by observing the polarized electron cyclotron emission. The emission is viewed along a constant magnetic field surface. This simplifies the resonance condition and gives a direct correlation between emission frequency and kinetic energy of the emitting electron. A transformation technique is formulated which determines the anisotropy of the distribution and number density of superthermals at each energy measured. The steady-state distribution during lower hybrid current drive and examples of the superthermal dynamics as the runaway condition is varied are presented for discharges in the PLT tokamak.

Original languageEnglish (US)
Pages (from-to)1593-1598
Number of pages6
JournalReview of Scientific Instruments
Volume59
Issue number8
DOIs
StatePublished - Dec 1 1988

All Science Journal Classification (ASJC) codes

  • Instrumentation

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