H 1NF仿星器标准磁场位形分析与高能量离子运动轨道模拟

本文分析了H 1NF仿星器的磁场线圈组成与分布特征，研究了其在标准运行模式下的磁场位形特点，并模拟计算出高能量离子在该标准磁场位形中的典型运动轨道。基于H 1NF仿星器标准磁场位形的磁轴位置和磁面沿环向角的变化规律，以磁轴为旋转轴，按照旋转规律将不同环向角的极向截面旋转后得到一种旋转坐标系下的等效标定极向截面，并将高能量离子的三维运动轨道投影到这种等效标定极向截面上，从而可更加清晰地显示出高能量离子在该磁场位形中的运动轨道特征。结果表明，H 1NF仿星器中的通行粒子和捕获粒子轨道特征均与一般托卡马克中的相应粒子轨道特征相似，但H 1NF仿星器中的通行粒子轨道在等效标定极向截面上绕几圈后才闭合，H 1NF仿星器中捕获粒子的香蕉轨道没有闭合，且轨道逐渐向磁面外侧漂移，最终可能导致粒子损失。

Configuration Analysis of H 1NF Stellarator Standard Magnetic Field and Motion Orbit Simulation of Energetic Ion

The composition and distribution characteristics of the magnetic field coil of H 1NF stellarator were analyzed, its magnetic field configuration characteristics in the standard operation mode were studied, and the typical motion orbit of energetic ion in the standard magnetic field configuration was simulated and calculated. Based on the position of the magnetic axis and the change rule of the magnetic plane along the toroidal direction for the standard magnetic field configuration of H 1NF stellarator, taking the magnetic axis as the rotation axis, the poloidal cross sections with different toroidal angles were rotated according to the rotation law to obtain an equivalent calibrated poloidal cross section in a rotating coordinate system. And the three dimensional motion orbit of energetic ion was projected onto the equivalent calibration poloidal cross section, so that the motion orbit characteristics of energetic ions in the magnetic field configuration can be more clearly displayed. The results show that the orbits of the passing particle and trapped particle in H 1NF stellarator are similar to those in the general Tokamak. But the orbit of the passing particle in H 1NF stellarator is closed after a few turns on the equivalent calibrated poloidal cross section, the banana orbit of the captured particle in the H 1NF stellarator is not closed, and its orbit gradually drifts to the outside of the magnetic plane, which may eventually lead to particle loss.