Investigation of ion fishbone stability on HL-2A using NIMROD

Yaorong YANG (杨耀荣); Yawei HOU (候雅巍); Wei CHEN (陈伟); Ping ZHU (朱平); Xianqu WANG (王先驱); Zhihui ZOU (邹志慧); Yi YU (余羿); Min XU (许敏); Minyou YE (叶民友)

doi:10.1088/2058-6272/ab1295

Plasma Science and Technology > 2019 > 21(8): 85101-085101. > DOI: 10.1088/2058-6272/ab1295

Yaorong YANG (杨耀荣), Yawei HOU (候雅巍), Wei CHEN (陈伟), Ping ZHU (朱平), Xianqu WANG (王先驱), Zhihui ZOU (邹志慧), Yi YU (余羿), Min XU (许敏), Minyou YE (叶民友). Investigation of ion fishbone stability on HL-2A using NIMROD[J]. Plasma Science and Technology, 2019, 21(8): 85101-085101. DOI: 10.1088/2058-6272/ab1295

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Investigation of ion fishbone stability on HL-2A using NIMROD

¹ Department of Engineering and Applied Physics, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, People’s Republic of China
² Southwestern Institute of Physics, Chengdu 610041, People’s Republic of China
³ CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
⁴KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
⁵ Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States of America
⁶ Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

Funds: This work was supported by the National Magnetic Confinement Fusion Program (Nos. 2014GB110000, 2014GB124002 and 2015GB101004), National Natural Science Foundation of China (Nos. 11475058, 11875253 and 11775221), the Fundamental Research Funds for the Central Universities (No. WK3420000004). Author P Zhu also acknowledges the supports from US Department of Energy (Nos. DE-FG02- 86ER53218 and DE-FC02-08ER54975). This work used resources of Supercomputing Center of University of Science and Technology of China.

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Received Date: November 09, 2018
Revised Date: March 20, 2019
Accepted Date: March 21, 2019

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Abstract

Abstract

Numerical calculations of resistive internal kink mode with effects of energetic particles (EPs) on HL-2A have been performed using the hybrid kinetic-MHD model inplemented in the NIMROD code. The m/n=1/1 resistive internal kink mode is unstable in MHD limit. However, with kinetic effects of energetic ions, a fishbone mode is excited with mode frequency around 10 kHz. We calculate the impact of resistivity on the growth rate and frequency of ion fishbone mode, and the results are in good agreement with the analytic solutions, which are obtained by solving the fishbone dispertion relation including resistivity effect. The effects of β_frac and cut off velocity of EP on fishbone mode are calculated in detail, where β_frac is the ratio of EP pressure to background plasma pressure. This work presents a clear explanation of the stabilizing effect of ECRH on ion fishbone, which is first observed on HL-2A.
- energetic particles,
- fishbone mode,
- hybrid simulation

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5.	Shi, P.-W., Chen, W., Duan, X.-R. Energetic Particle Physics on the HL-2A Tokamak: A Review. Chinese Physics Letters, 2021, 38(3): 035202. DOI:10.1088/0256-307X/38/3/035202
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