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Power Supply Circuit for Dual Operation in Producing Tokamak and Reversed Field Pinch Plasmas in RELAX

Takeru INOUE, Shinichiro INAGAKI, Akio SANPEI, Haruhiko HIMURA

Department of Electronics, Kyoto Institute of Technology, Goshokaidocho, Sakyo Ward, Kyoto 606-8585, Japan

(Received 23 August 2024 / Accepted 11 September 2024 / Published 10 November 2024)

Abstract

The power supply circuit attached to RELAX was upgraded to vary the magnitudes of the toroidal field on a single machine. The circuit enables dual operation—tokamak and reversed field pinch (RFP)—through a switch. Consequently, the upgraded circuit enables RELAX to operate within a wide range of safety factor profiles, encompassing tokamak and RFP plasmas. This upgrade enables the production of two distinct toroidal plasmas with comparable plasma currents, providing an opportunity to conduct systematic studies on the effect of magnetic shear in relatively low-density regions, where the two-fluid effect still represents a certain lack of mutual understanding.

Copyright (c) 2024 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

power crowbar circuit, safety factor, magnetic shear, tokamak, reversed-field-pinch

DOI: 10.1585/pfr.1205030

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References

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