Response of Energetic-Particle-Driven Magnetohydrodynamics (MHD) Instability to Modulated ECH in Heliotron J

Yao ZHONG; Kazunobu NAGASAKI; Zhibin WANG; Shinji KOBAYASHI; Shigeru INAGAKI; Takashi MINAMI; Shinichiro KADO; Shinsuke OHSHIMA; Fumiyoshi KIN; Chenyu WANG; Yuji NAKAMURA; Shigeru KONOSHIMA; Toru MIZUUCHI; Hiroyuki OKADA; Nikolai MARUSHCHENKO; Jian CHEN

doi:10.1585/pfr.19.1202008

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Response of Energetic-Particle-Driven Magnetohydrodynamics (MHD) Instability to Modulated ECH in Heliotron J

Yao ZHONG, Kazunobu NAGASAKI, Zhibin WANG, Shinji KOBAYASHI, Shigeru INAGAKI, Takashi MINAMI, Shinichiro KADO, Shinsuke OHSHIMA, Fumiyoshi KIN, Chenyu WANG, Yuji NAKAMURA, Shigeru KONOSHIMA, Toru MIZUUCHI, Hiroyuki OKADA, Nikolai MARUSHCHENKO, Jian CHEN

Author information

Yao ZHONG
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University
Institute of Advanced Energy, Kyoto University
Kazunobu NAGASAKI
Institute of Advanced Energy, Kyoto University
Zhibin WANG
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University
Shinji KOBAYASHI
Institute of Advanced Energy, Kyoto University
Shigeru INAGAKI
Institute of Advanced Energy, Kyoto University
Takashi MINAMI
Institute of Advanced Energy, Kyoto University
Shinichiro KADO
Institute of Advanced Energy, Kyoto University
Shinsuke OHSHIMA
Institute of Advanced Energy, Kyoto University
Fumiyoshi KIN
Institute of Advanced Energy, Kyoto University
Chenyu WANG
Institute of Advanced Energy, Kyoto University
Yuji NAKAMURA
Graduate School of Energy Science, Kyoto University
Shigeru KONOSHIMA
Institute of Advanced Energy, Kyoto University
Toru MIZUUCHI
Institute of Advanced Energy, Kyoto University
Hiroyuki OKADA
Institute of Advanced Energy, Kyoto University
Nikolai MARUSHCHENKO
Max-Planck Institute for Plasma Physics
Jian CHEN
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University

Keywords: MHD instability, energetic-particle-driven mode, ECH

JOURNAL FREE ACCESS

2024 Volume 19 Pages 1202008

DOI https://doi.org/10.1585/pfr.19.1202008

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Abstract

The response of energetic particle (EP)-driven magnetohydrodynamic instability to electron cyclotron heating (ECH) was experimentally studied in Heliotron J. The neutral beam injection power remained constant throughout the experiment, and the ECH power was systematically modulated. When the ECH power was gradually decreased to a certain threshold, the excitation of an EP mode with a frequency of approximately 100 kHz was observed. The response to ECH showed a close linkage with variations in electron density and temperature. In addition, a distinct delay response effect concerning plasma pressure suggests a complex delay response of mode excitation and suppression.

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