托卡马克装置中等离子体环向旋转对三维响应场的影响  

Influence of toroidal rotation on plasma response to external RMP fields in tokamak

作　　者：李春雨 郝广周 刘钺强 王炼 刘艺慧子 Li Chun-Yu;Hao Guang-Zhou;Liu Yue-Qiang;Wang Lian;Liu Yi-Hui-Zi(Southwestern Institute of Physics,Chengdu 610041,China;General Atomics,San Diego,California 92186-5608,USA;School of Nuclear Science and Technology,University of South China,Hengyang 421001,China)

机构地区：[1]核工业西南物理研究院,成都610041 [2]美国通用原子公司,圣地亚哥92186-5608 [3]南华大学核科学技术学院,衡阳421001

出　　处：《物理学报》2022年第7期250-258,共9页Acta Physica Sinica

基　　金：核工业西南物理研究院创新项目(批准号:202001XWCXRC001);国家自然科学基金(批准号:11775067)资助的课题。

摘　　要：本文利用MARS-F程序,数值研究了HL-2M托卡马克装置高比压等离子体中,环向旋转对外加共振磁扰动场的响应特性的影响.研究发现,等离子体响应显著改变共振磁扰动的谱分布,并影响等离子体内部共振磁扰动场与共振磁扰动线圈电流相位差的依赖关系,从而改变有理面处径向扰动场的幅值.当边界旋转频率较小时,在最外有理面处,等离子体响应对外加共振磁扰动场有明显的放大效应.通常,边缘局域模的控制效果依赖于最外有理面处共振磁扰动场的幅度,因此可通过控制旋转剖面实现对共振磁扰动场的调控,进而优化边缘局域模的控制方案.The type-I edge localized mode(ELM)is a critical event associated with magneto-hydrodynamic(MHD)instabilities occurring in tokamak high-confinement(H-mode)discharges,that leads to huge heat loads on the plasma phasing components(PFC)and may result in material damages.It is important to effectively control large ELMs,in order to ensure safe operation of the future reactor-scale devices such as ITER and DEMO.Resonant magnetic perturbation(RMP)has been experimentally demonstrated to be a mature and robust technique for controlling ELMs.A set of parameters,such as the edge safety factor,the plasma flow,the RMP coil geometry and the spectrum of the applied external field,have been found to play important roles in controlling ELMs by RMP.Furthermore,the plasma pressure is known to affect the plasma response to the RMP field,in particular near the no-wall beta limit.This is because high plasma pressure drives the resonant field amplification of the external field by the plasma response.The ITER 10 MA steady state scenario will be operated near the no-wall stability limit.The new tokamak device HL-2M will also operate in the relatively high-beta regimes.On the other hand,more investigations are still needed to understand the influence of toroidal flow on the high-beta plasma response.This work employs a single fluid toroidal model to compute the plasma RMP response in HL-2M,emphasizing on the roles of two key physical quantities:the plasma resistivity and the toroidal rotation.The former allows penetration of the external RMP field into the plasma,while the latter mainly provides screening effect on the resonant field component.More specifically,the MARS-F code is utilized to study the plasma response to the externally applied n=1(n is the toroidal mode number)RMP field for high-beta HL-2 M discharges,while varying the plasma toroidal rotation profile.The plasma response is found to(ⅰ)substantially modify the poloidal spectrum of the applied vacuum RMP field,(ⅱ)change the amplitude of the resonant radial field amplit

关 键 词：边缘局域模 共振磁扰动 旋转频率 HL-2M装置 

分 类 号：TL631.24[核科学技术—核技术及应用]