Simulations of energetic alpha particle loss in the presence of toroidal field ripple in the CFETR tokamak

作     者：Yingfeng XU Debing ZHANG Jiale CHEN Fangchuan ZHONG 徐颖峰;张德兵;陈佳乐;钟方川

作者机构：College of ScienceDonghua UniversityShanghai 201620People's Republic of China Member of Magnetic Confinement Fusion Research CentreMinistry of EducationShanghai 201620People's Republic of China Department of PhysicsEast China University of Science and TechnologyShanghai 200237People's Republic of China Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第10期

页      面：12-22页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：the support from the CFETR team jointly supported by National Natural Science Foundation of China(Nos.12175034,12005063) the National Key R&D Program of China(No.2019YFE03030001) the Fundamental Research Funds for the Central Universities(No.2232022G-10) 

主　　题：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 *** effects of the outer boundary and the ripple amplitude on alpha particle losses have been *** 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 *** alpha particles in the plasma core are lost due to the ripple stochastic transport for a large ripple amplitude *** 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 *** heat load spots have been observed in alpha particle loss simulations,which is due to the ripple well *** transition of the lost alpha particle behavior from the ripple stochastic diffusion to the ripple well trapping has been identified in our CFETR *** Coulomb collision effect is responsible for this transition.