Plasma and Fusion Research

Volume 14, 1203064 (2019)

Rapid Communications

Hybrid Simulation Study on Anisotropic Response of Ions to a Low-Frequency Wave in a Field-Reversed Configuration
Takahiro URANO, Toshiki TAKAHASHI, Akiyoshi HOSOZAWA1), Tomohiko ASAI1) and Shigefumi OKADA2)
Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
1)
College of Science and Technology, Nihon University, Tokyo 101-8308, Japan
2)
Osaka University, Suita 565-0871, Japan
(Received 24 January 2019 / Accepted 10 February 2019 / Published 22 March 2019)

Abstract

Using a hybrid simulation code, we studied the application of low-frequency wave to a field-reversed configuration plasma. The wave application antenna was arranged to sandwich the separatrix, and the antenna current was varied sinusoidally with a maximum of 30 kA and a frequency of 80 kHz. The simulation revealed that when the ion pressure is regarded as a tensor, the parallel ion temperature estimated from the axial velocity distribution near the midplane exceeds the perpendicular temperature. That is, the plasma ions respond anisotropically to a low-frequency wave.

Keywords

field-reversed configuration, low-frequency wave, ion heating, hybrid simulation, anisotropic ion temperature

DOI: 10.1585/pfr.14.1203064

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