THE INFLUENCE OF THE POLOIDAL MAGNETIC FIELD ON MODE CONVERSION OF THE FAST MAGNETOSONIC WAVE IN A TWO COMPONENT TOROIDAL PLASMA
Mode conversion from the fast magnetosonic wave to a slow wave can amount for the greatest part of power absorption in a two-ion component toroidal plasma. It is shown that, with allowance for the correct form of the rotational transform, mode conversion in a cold plasma is only possible close to magnetic surfaces which do not cross the resonance i.e. the surface where the wave frequency is equal to the minority ion cyclotron frequency. Mode conversion at a layer which crosses the magnetic surfaces is possible if the plasma is hot and/or the layer is close to the resonance. In this case, however, mode conversion could be overshadowed by minority ion cyclotron damping, i.e. the perpendicular component of the wave vector could fail to reach values sufficiently large to allow electron Landau damping or second harmonic majority ion cyclotron damping to contribute appreciably to the R.F. power absorption.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP 2/272, 1984
Record Number: 1989122064400 / Last updated on: 1987-01-01
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