球环位形磁流体平衡的数值模拟

NUMERICAL STUDY OF SPHERICAL TORUS MHD EQUILIBRIUM CONFIGURATION

对原有的托卡马克平衡编码SWEQU进行了改进,使之适用于小环径比球形环装置的磁流体研究。用改进后的平衡编码SWEQU模拟了放电初始阶段等离子体平衡位形的演化及稳态阶段的双零偏滤器平衡位形。结果表明,不但可以得到球形环装置稳态阶段的平衡位形,也可以模拟等离子体电流上升阶段平衡位形的演化过程。

Tokamak equilibrium code SWEQU has been modified so that it can be used for the MHD equilibrium study of low aspect ratio device.Evolution of plasma configuration in startup phase and doublenull divertor configuration in steadystate phase has been simulated using the modified code.Results show that the new code can be used not only to obtain the equilibrium configuration of spherical Torus in steadystate phase,but also to simulate the evolution of plasma in the startup phase. 