Hybrid Simulation of a High-Beta Linear Plasma Column Applied with a Low Frequency Wave

Abstract

Wave excitation and propagation by applying a low frequency wave to a high-beta plasma are simulated by a 3-dimensional hybrid model, where ions are treated as particles while electrons are regarded as fluids. It is found that excitation of the toroidal magnetic field occurs outside the separatrix and the wave attenuated significantly near the separatrix. Although the attenuation due to an ion cyclotron resonance is conceivable, no temperature rise in the resonance region is observed. The attenuation condition is given here on the basis of a linear theory, and it shows a good agreement with hybrid simulation results in terms of the attenuation position.

Hybrid Simulation Study on Anisotropic Response of Ions to a Low-Frequency Wave in a Field-Reversed Configuration

“…The equations employed in the hybrid simulation code are shown in Ref. [15]. The wave application antenna was a loop antenna with a radius of 0.30 m, and two loop antennas were arranged at z = ±0.59 m. The applied antenna current was sinusoidal with a maximum of 30 kA and a frequency of 80 kHz.…”