Coherent MHD Behaviour in a Shallow Magnetic Well Configuration in Heliotron J

Plasma and Fusion Research 2026 Open access

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Authors: Sjoerd P. REINHOUDT, K. Nagasaki, Josefine H.E. PROLL, F. Kin, S. Inagaki, Shinji Kobayashi, S. Kado
DOI: 10.1585/pfr.21.1202007
Cited by: 0
References: 9

Abstract

This article presents the first experimental results from a novel configuration in Heliotron J, which features a shallow magnetic well in the core of the plasma. A broadband coherent fluctuation of approximately 10 kHz is observed in a low-β electron cyclotron heated (ECH) plasma at rotational transform ι/2π = 0.55 in this configuration, while no mode appears in a deep magnetic well configuration. An electron cyclotron emission measurement shows the mode is excited in the core region where the magnetic well is shallow. This indicates Heliotron J is able to sustain viable plasmas with an edge-hill, although these can be destabilised even at low density and pressure.

Fields of Study & Subjects

Magnetic confinement fusion research Fusion and Plasma Physics Studies Plasma Diagnostics and Applications

Publication details

Journal / source
Plasma and Fusion Research
Volume
21
Issue
0
Pages
n/a–n/a
Publication date
1 January 2026
Language
EN