为了控制托卡马克的运行及进一步研究等离子体约束磁流体动力学不稳定性,确定等离子体的位置和形状是必要的。研究者提出了各种各样的方法[1],其中常用于托卡马克的方法称为电流丝化近似法[2],该方法采用多个线电流采置换等离子体电流。虽然它只基于简单近似的基础上,但采用磁测量方法就相当好地重现了等离子体的形状。而基于偏微分 In order to control the operation of the tokamak and to further investigate the plasma confinement magnetohydrodynamics instability, it is necessary to determine the location and shape of the plasma. Researchers have proposed a variety of methods [1]. The commonly used method for tokamak is called the current filament approximation [2]. This method uses multiple line currents to replace the plasma current. Although it is based on a simple approximation, the shape of the plasma is fairly well reproduced using magnetic measurements. Based on partial differentiation