EPJ Web Conf.
Volume 147, 201719th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
|Number of page(s)||6|
|Published online||24 July 2017|
Study of energetic particle physics with advanced ECEI system on the HL-2A tokamak
1 Southwestern Institute of Physics, Chengdu, 610041, China
2 Xihua University, Chengdu, 610039, China
* Corresponding author: firstname.lastname@example.org
Published online: 24 July 2017
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 qmin > 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.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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