INTERACTION OF HIGH FREQUENCY ELECTROMAGNETIC FIELDS WITH PLASMA,
GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CALIF
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This work is devoted to an investigation of the interaction between plasma and travelling and standing electromagnetic waves within a frequency range from 1 to 10 MHz. The character of the damping of a high-frequency field in a plasma which depends on the parameters of the plasma and of the field, was experimentally investigated in devices having discharge tubes with toroidal and linear configurations. The influence of the high-frequency field upon the charge particle distributions in the plasma was studied. The presence of radial forces was shown, which act upon the plasma in the high frequency field by compressing the plasma toward the tube axis. In devices with a travelling electromagnetic wave, the authors investigated the constant azimuthal current arising as a result of the transport of plasma electrons by the wave. The dependence of this current upon the plasma and wave parameters was found. It is shown that azimuthal currents of magnitude higher than some critical value excite instabilities of a beam character in the plasma of the toroid.
- Plasma Physics and Magnetohydrodynamics