## Using perpendicular electron-cyclotron emission to diagnose the thermal barrier electrons in TMX-Upgrade. Progress report

Description:
Possibilities are explored for diagnosing the hot-electron distribution function for the thermal barriers of tandem mirrors using perpendicular electron-cyclotron emission. Emission from a relativistic bimaxwellian with a loss cone is calculated in the single-particle limit. Formulae are derived for finding T/sub perpendicular/ for a bimaxwellian by measuring frequencies of the harmonic intensity maxima at optically thin frequencies, or the intensity at optically thick frequencies. A positive par. delta f/par. delta p/sub perpendicular/ in the distribution function is shown to lead to decreased absorption, and instability for low T/sub perpendicular/. Methods are discussed for diagnosing the loss-cone distribution by comparing numerical calculation with measured intensity ratios and frequencies at the harmonic peaks. Finally, the perpendicular source function in the single-particle limit for this distribution function is calculated.

Date:
January 1, 1983

Creator:
Celata, C.M.

Item Type:
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Partner:
UNT Libraries Government Documents Department