托卡马克中旋转刹车对等离子体响应的影响  

Effect of rotation braking on the plasma response in Tokamaks

作　　者：王燕飞 李莉[1] WANG Yanfei;LI Li(College of Science,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学理学院,上海201620

出　　处：《东华大学学报（自然科学版）》2023年第1期119-125,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金面上项目(1207050370)。

摘　　要：根据ASDEX-Upgrade托卡马克装置31131放电的试验平衡,构建一组在台基区附近具有不同刹车位置的等离子体旋转剖面。采用线性等离子体响应模型并利用MARS-F程序进行计算,研究刹车点位置对等离子体响应的影响,以期为大型托卡马克装置利用共振扰动场控制边缘局域模提供理论指导。模拟结果表明,当等离子体旋转的刹车点经过有理面时,由于有理面上存在磁岛链,等离子体对共振磁扰动场的屏蔽作用降低,最靠近等离子体边界的有理面上的总径向扰动磁感应强度的共振分量以及等离子体分形面上X点附近的最大法向扰动位移值发生跃变,即等离子体响应发生跃变,粒子和能量的径向输运增强。A group of plasma toroidal rotation with different braking positions(zero-crossings) in the pedestal region was assumed according to the experimental equilibrium in the discharge 31131 of ASDEX-Upgrade Tokamak. The linear plasma response model and MARS-F code were used to investigate the effect of the location of zero-crossing on the plasma response, which could provide a theoretical guidance for the control of edge local modes(ELMs) by the resonant magnetic perturbation(RMP) fields in large Tokamak. The simulation results show that when the location of zero-crossing passes through the resonant surface, the shielding effect of the plasma on the RMP field decreases due to the existence of magnetic island chains on the rational surface. The resonant component of the total radial perturbation magnetic induction intensity on the rational surface closest to the plasma boundary and the value of the maximum normal perturbation displacement near the X point on the plasma boundary jump, which means the plasma response jumps. Thus, the radial transport of particles and energy is enhanced.

关 键 词：等离子体响应 等离子体旋转 边缘局域模 MARS-F程序 共振磁扰动 X点扰动位移 

分 类 号：O534[理学—等离子体物理]