1. Study of energetic particle physics with advanced ECEI system on the HL-2A tokamak.
- Author
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Zhongbing Shi, Min Jiang, Liming Yu, Wei Chen, Peiwan Shi, Wulyu Zhong, Zengchen Yang, Boyu Zhang, Xiaoquan Ji, Yonggao Li, Yan Zhou, Shaodong Song, Mei Huang, Xianming Song, Jiaxuan Li, Baoshan Yuan, Bingzhong Fu, Zetian Liu, Xuantong Ding, and Yuhong Xu
- Subjects
TOKAMAKS ,PLASMA gases ,PARTICLE physics ,ELECTRON cyclotron resonance heating ,PLASMA currents - Abstract
Understanding the physics of energetic particles (EP) is crucial for the burning plasmas in next generation fusion devices such as ITER. In this work, three types of internal kink modes (a saturated internal kink mode (SK), a resonant internal kink mode (RK), and a double e-fishbone) excited by energetic particles in the low density discharges during ECRH/ECCD heating have been studied by the newly developed 24(poloidal) × 16(radial) = 384 channel ECEI system on the HL-2A tokamak. The SK and RK rotate in the electron diamagnetic direction poloidally and are destabilized by the energetic trapped electrons. The SK is destabilized in the case of q
min > 1, while the RK is destabilized in the case of qmin < 1. The double e-fishbone, which has two m/n = 1/1 modes propagating in the opposite directions poloidally, has been observed during plasma current ramp-up with counter-ECCD. Strong thermal transfer and mode coupling between the two m/n = 1/1 modes have been studied. [ABSTRACT FROM AUTHOR]- Published
- 2017
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