Plasma and Fusion Research

Volume 18, 2402024 (2023)

Regular Articles

Relationship between Edge Magnetic Field and Rotation of the Spatial Structure of Visible Light Emitted from Low Aspect RFP Plasmas on RELAX
Akio SANPEI, Haruhiko HIMURA, Takeru INOUE, Shinichiro INAGAKI, Natsuki KOJIMA, Ryota TAKAOKA and Takahiro SASAKI
Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo Ward, Kyoto 606-8585, Japan
(Received 9 January 2023 / Accepted 3 March 2023 / Published 27 April 2023)

Abstract

The relationship between the edge toroidal field Bt and the rotation of the spatial structure of visible light emitted from reversed field pinch (RFP) plasmas is reported. The rotation of the spatial structure of visible light is captured by a high-speed camera attached to a horizontal viewing port of the RELAX, which was designed for RFP experiments. It is found that the rotation velocity and the direction of the spatial structure of visible light depend on Bt. In the non-reversal case, the structure rotates in the co-current direction, while in the counter-current direction in the reversal case. The frequency and direction of the spatial structure of visible light are consistent with magnetic fluctuations measured by magnetic probes.

Keywords

reversed field pinch, low aspect ratio, plasma rotation, high-speed camera

DOI: 10.1585/pfr.18.2402024

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