S W Daniels and M E Bacon 1982 Plasma Phys. 24 167 doi:10.1088/0032-1028/24/2/004
S W Daniels and M E Bacon
Show affiliationsLow frequency modulation of the transmitted and reflected microwave power from a thin plasma disc has been observed. The plasma is produced by electron cyclotron resonance (ECR) and is sustained in a steady state by absorption at the upper hybrid frequency. By carefully adjusting the input power and the magnetic field a superimposed oscillating absorption process is initiated. The electron density and/or temperature is found to oscillate at the same frequency which is found to fit the simple ion acoustic dispersion relation f=cs/ lambda where cs=(kTe/mi)12/. Since a number of other experiments in entirely different geometry exhibit what appears to be the same phenomena, the occurrence of these relaxation oscillations in microwave plasma interactions would seem to be fairly common.
52.50.Sw Plasma heating by microwaves; ECR, LH, collisional heating
Issue 2 (February 1982)
S W Daniels and M E Bacon 1982 Plasma Phys. 24 167
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