文献类型：期刊文献

英文题名：Simulations of energetic alpha particle loss in the presence of toroidal field ripple in the CFETR tokamak

作者：Xu, Yingfeng[1,2];Zhang, Debing[3];Chen, Jiale[4];Zhong, Fangchuan[1,2]

机构：[1]Donghua Univ, Coll Sci, Shanghai 201620, Peoples R China;[2]Minist Educ, Magnet Confinement Fus Res Ctr, Shanghai 201620, Peoples R China;[3]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[4]Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

年份：2022

卷号：24

期号：10

外文期刊名：PLASMA SCIENCE & TECHNOLOGY

收录：;EI(收录号：20223112525336);WOS:【SCI-EXPANDED(收录号:WOS:000830797100001)】；

基金：The authors appreciate the support from the CFETR team. Numerical simulations were performed on the ShenMa High Performance Computing Cluster in Institute of Plasma Physics, Chinese Academy of Sciences. The work was jointly supported by National Natural Science Foundation of China (Nos. 12175034, 12005063), the National Key R&D Program of China (No. 2019YFE03030001) and the Fundamental Research Funds for the Central Universities (No. 2232022G-10).

语种：英文

外文关键词：CFETR; toroidal field ripple; orbit-following code; alpha particle loss

摘要：Energetic alpha particle losses with the toroidal field ripple and the Coulomb collision in the CFETR tokamak have been simulated by using the orbit-following code GYCAVA for the steady-state and hybrid scenarios. The effects of the outer boundary and the ripple amplitude on alpha particle losses have been investigated. The loss fractions and heat loads of alpha particles in the hybrid scenario are much smaller than those in the steady-state scenario for a significant ripple amplitude. Some alpha particles in the plasma core are lost due to the ripple stochastic transport for a large ripple amplitude parameter. The heat loads with the last closed flux surface boundary are different from those with the wall boundary for the CFETR tokamak, which can be explained by typical alpha particle orbits. Discrete heat load spots have been observed in alpha particle loss simulations, which is due to the ripple well loss. The transition of the lost alpha particle behavior from the ripple stochastic diffusion to the ripple well trapping has been identified in our CFETR simulations. The Coulomb collision effect is responsible for this transition.