TITLE

Experiments on whistler mode electron-cyclotron resonance plasma startup and heating in an axisymmetric magnetic mirror

AUTHOR(S)
Booske, J. H.; Getty, W. D.; Gilgenbach, R. M.; Jong, R. A.
PUB. DATE
October 1985
SOURCE
Physics of Fluids (00319171);Oct85, Vol. 28 Issue 10, p3116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Whistler mode electron-cyclotron resonance heating (ECRH) has been performed simultaneously with whistler mode electron-cyclotron emission measurements on an axisymmetric magnetic mirror plasma. Results presented include a study of the early plasma startup phase and two instability phases, one believed to be caused by a whistler instability and another by magnetohydrodynamic (MHD) flute instability. Enhanced microwave emission at frequencies below the midplane electron-cyclotron frequency has been correlated with enhanced electron endloss during the whistler instability. Cyclotron emission spectra during the startup phase match predictions for a ‘‘sloshing electron’’ type distribution based on numerical modeling. This distribution also agrees with anisotropic distributions resulting from electron-cyclotron heating as predicted by Fokker–Planck computer simulations. Experimentally measured heating rates show good agreement with simplified analytical models based on stochastic heating.
ACCESSION #
9827495

 

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