Hybrid simulation study on ion heating by low-frequency wave excited in a field-reversed configuration

• DOI: 10.1088/1741-4326/adb2a6
• Publication Date: 2025-02-05T22:51:21Z
• Authors: Takahiro Urano; Toshiki Takahashi; Naoki Mizuguchi; Tomohiko Asai; Shigefumi Okada
• Keywords: Lower hybrid oscillation

Abstract In this paper, we use hybrid simulation to elucidate the plasma heating mechanism due waves excited in Field-Reversed Configuration plasma(FRC). The parameters are a separatrix radius of 0.16 m and length 1.16 (x-point position is z = ±0.57 m). wave excitation antenna consists two loop antennas with 0.3 placed at ±0.5 m. current waveform sine maximum value 30 kA frequency 160 kHz. results showed that caused compression/expansion plasma, same time, temperature increased or decreased compressed/expanded position. When applied, 23% increase volume-averaged ion observed compared case without applied. On other hand, no electron observed. For fluid, adiabatic condition well established, changes as compressed expanded. for ions, kinetic energy perpendicular magnetic field lines increases during compression, part transferred parallel component by collisionless pitch angle scattering, resulting so-called pumping.