EAST上共振磁扰动引起的随机场对杂质输运的模拟研究  

Simulation of impurity transport induced by RMP stochastic magnetic field on EAST

作　　者：常友友 孙有文 盛回 闫星廷 李翰辉 谢朋成 张文敏 郭晋 毛世峰[1] 刘钺强 张凌 段艳敏 李颖颖 臧庆 叶民友[1] CHANG You-you;SUN You-wen;SHENG Hui;YAN Xing-ting;LI Han-hui;XIE Peng-cheng;ZHANG Wen-min;GUO Jin;MAO Shi-feng;LIU Yue-qiang;ZHANG Ling;DUAN Yan-min;LI Ying-ying;ZANG Qing;YE Min-you(School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031;Huazhong University of Science and Technology,Wuhan 430074;General Atomics,San Diego 92186-5608)

机构地区：[1]中国科学技术大学核科学技术学院,合肥230026 [2]中国科学院等离子体物理研究所,合肥230031 [3]华中科技大学,武汉430074 [4]美国通用原子能公司,圣地亚哥92186-5608

出　　处：《核聚变与等离子体物理》2025年第1期76-83,共8页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束聚变能发展研究专项“偏滤器脱靶条件下小或无ELM运行模式的模拟研究”(2019YFE03030004)。

摘　　要：基于EAST实验并结合随机场输运模型,模拟研究了真空场假设下和考虑等离子体响应时,共振磁扰动(RMP)引起的随机场对W^(20+)输运的影响。模拟结果表明,在随机场区域内,真空场假设下W^(20+)的等效输运系数更大,但响应场下W^(20+)的等效输运系数可达3~5m^(2)·s^(−1),约为W^(20+)二维新经典扩散系数的3~5倍。考虑等离子体响应时,随机场区域W^(20+)的等效输运系数与RMP谱型的依赖关系和实验结果符合得较好,但真空场假设下的结果与实验结果存在约60°的相位差。此外,相比于高环向模数的RMP,W^(20+)的等效输运系数在低环向模数的RMP下更大,这与实验观测定性一致。Based on EAST experiments and a stochastic magnetic field transport theory model,the effect of stochastic magnetic field on W^(20+)transport caused by resonant magnetic perturbation(RMP)is simulated by considering vacuum and plasma response effect,respectively.The numerical simulation results indicate that within the stochastic layer,the impact of the stochastic magnetic field on the W^(20+)transport is greater in vacuum assumption than in plasma.When the plasma response effect is taken into account,the equivalent transport coefficient of W^(20+)in the stochastic magnetic field can reach 3~5m^(2)·s^(−1),which is about 3~5 times the two-dimensional neoclassical diffusion coefficient of W^(20+).The dependence of the equivalent transport coefficient of W^(20+)in the stochastic magnetic field on the RMP spectrum is in good agreement with EAST experimental observations when considering the plasma response effect,while the results taking the vacuum assumption have a phase shift of about 60°compared to experimental results.In addition,the impact of the stochastic magnetic field on W^(20+)equivalent transport coefficient is more significant at low toroidal mode numbers than that at high ones,which is qualitatively consistent with the results of EAST experiments.

关 键 词：共振磁扰动 随机场 杂质输运 

分 类 号：TL622.3[核科学技术—核技术及应用]