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An Electrodeless Discharge at 60 Hz

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1 Author(s)
Eckert, Hans U. ; The Aerospace Corporation El Segundo, California 90245

Inductive flow discharges have been generated in argon at pressures between 0.6 and 3.0 Torr in an 80-mm wide toroidal tube that was threaded by a magnetic core system of 400 cm2 cross section. The fields required to maintain the discharges were produced by exciting the core at 60 Hz. Starting was accomplished either by a capacitor discharge through auxiliary electrodes or in an electrodeless manner by exciting the core at 9600 Hz. Plasma currents at 1 Torr exceeded 100A and were slightly trailing the voltage. Mean electron densities at this condition were estimated to be 5×1013/cm3. Power dissipation in the discharge was between 0.5 and 1.9 kW at an average conversion efficiency of 60%.

Published in:

Plasma Science, IEEE Transactions on  (Volume:2 ,  Issue: 4 )