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Loss of energetic particles due to feedback control of resistive wall mode in HL-3

Plasma Science and Technology 2024年第10期26卷 17-28页

作者： Yifei ZHAO Yueqiang LIU Guangzhou HAO Zhengxiong WANG Guanqi DONG Shuo WANG Chunyu LI Guanming YANG Yutian MIAO Yongqin WANG Dalian University of Technology Dalian 116024People’s Republic of China General Atomics San Diego CA 92186-5608United States of America Southwestern Institute of Physics Chengdu 610041People’s Republic of China

Effects of three-dimensional(3D)magnetic field perturbations due to feedback control of an unstable n=1(n is toroidal mode number)resistive wall mode(RWM)on the energetic particle(EP)losses are systematically investigated for the HL-3 *** MARS-F(Liu et al 2000 *** 73681)code,facilitated by the test particle guiding center tracing module REORBIT,is utilized for the *** RWM is found to generally produce no EP loss for cocurrent particles in *** the same perturbation level at the sensor location for the close-loop system,feedback produces nearly the same loss of counter-current EPs compared to the open-loop *** however that the sensor signal is ten times smaller in the close-loop system than the open-loop counter part(reflecting the fact that the RWM is more stable with feedback),the counter-current EP loss is found significantly reduced in the *** of EP losses occur only for particles launched close to the plasma edge,while particles launched further away from the plasma boundary experience much less *** strike points of lost EPs on the HL-3 limiting surface become more scattered for particles launched closer to the plasma *** into account the full gyro-orbit of particles while approaching the limiting surface,REORBIT finds slightly enhanced loss fraction.

关键词： energetic particles resistive wall mode HL-3

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Effect of passive structure and toroidal rotation on resistive wall mode stability in the EAST tokamak

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Chinese Physics B 2014年第7期23卷 523-528页

作者：刘广君万宝年孙有文刘钺强郭文峰郝广周丁斯晔沈飙肖炳甲钱金平 Institute of Plasma Physics Chinese Academy of Sciences Luoyang Optoelectro Technology Development Center Euratom/UKAEA Fusion Association Culham Science CentreAbingdonOX14 3DBUnited Kingdom Southwestern Institute of Physics

If βN exceeds βNno-wall, the plasma will be unstable because of external kink and resistive wall mode （RWM）. In this article, the effect of the passive structure and the toroidal rotation on the RWM stability in the experimental advanced superconducting tokamak （EAST） are simulated with CHEASE and MARS codes. A model using a one-dimensional （1D） surface to present the effect of the passive plate is proved to be credible. The no wall fiN limit is about 3li, and the ideal wall βN limit is about 4.5li on EAST. It is found that the rotation near the q = 2 surface and the plasma edge affects the RWM more.

关键词： resistive wall mode passive structure rotation

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Numerical study of physical properties of resistive wall modes in tokamaks

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Chinese Physics B 2013年第5期22卷 375-380页

作者：夏新念刘悦刘超何玉玲夏国良 Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Dalian University of Technology) Ministry of EducationSchool of Physics and Optoelectronic Engineering Dalian University of Technology

The effect of plasma with toroidal rotation on the resistive wall modes in tokamaks is studied numerically. An eigenvalue method is adopted to calculate the growth rate of the modes for changing plasma resistivity and plasma density distribution, as well as the diffusion time of magnetic field through the resistive wall. It is found that the resistive wall mode can be suppressed by the toroidal rotation of the plasma. Also, the growth rate of the resistive wall mode decreases when the edge plasma density is the same as the core plasma density, but it only changes slightly with the plasma resistivity.

关键词： tokamak resistive wall mode toroidal rotation plasma density distribution

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