Numerical calculations of magnetoacoustic oscillations in toroidal plasmas
Abstract
Magnetoacoustic oscillations in toroidal argon and hydrogen plasmas have been calculated numerically and compared with those in cylindrical plasmas. The toroidal plasmas show reduced enhancement at resonance and shifted resonant frequencies. The position of maximum enhancement of the oscillation fields at resonance which occurs on the minor axis of a large aspect ratio torus is displaced not only toward lower static B field values but also in a direction at right angles to the gradient of absolute value of B when the aspect ratio is small. As the frequency is increased to values, only moderately higher than resonance, the spatial distribution of the oscillation fields rapidly becomes more complicated than those for the cylindrical plasmas.
 Publication:

IEEE Transactions on Plasma Science
 Pub Date:
 December 1979
 DOI:
 10.1109/TPS.1979.4317236
 Bibcode:
 1979ITPS....7..196M
 Keywords:

 Argon Plasma;
 Hydrogen Plasma;
 Magnetoacoustic Waves;
 Numerical Flow Visualization;
 Plasma Oscillations;
 Toroidal Plasmas;
 Difference Equations;
 Partial Differential Equations;
 Plasma Frequencies;
 Plasma Resonance;
 Plasma Waves;
 Resonant Frequencies;
 Spatial Distribution;
 Plasma Physics