Plasma and Fusion Research

Volume 17, 1403104 (2022)

Regular Articles

Simulation Method and Code Development for Non-Axisymmetric Eddy Currents on Vacuum Vessels
Yushiro YAMASHITA, Yuji NAKAMURA, Akihiro ISHIZAWA and Kiyomasa WATANABE1)
Graduate School of Energy Science, Kyoto University, Kyoto 611-0011, Japan
1)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
(Received 26 July 2022 / Accepted 22 September 2022 / Published 24 November 2022)

Abstract

An electric current is induced on the vacuum vessel when the toroidal current of a tokamak plasma varies in time, and it is called the eddy current. During disruption, the eddy current becomes large and influences the process of disruption by interacting with the confined plasma. We have developed a new non-axisymmetric eddy current simulation code, the Keddy3D that solves the eddy current equation based on the thin-wall approximation. The Keddy3D is suitable for simulating long-term non-axisymmetric disruption processes with low computational costs.

Keywords

tokamak, eddy current, numerical simulation, disruption

DOI: 10.1585/pfr.17.1403104

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