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本文讨论HL-1装置等离子体的平衡。用对称磁探针测量了等离子体的水平位移和垂直位移,并由微机数据处理系统即时给出位移随时间的变化规律。分析了装置存在的各种杂散场对等离子体平衡的影响。通过垂直位移测量鉴别了纵向场线圈和加热场绕组引起的水平杂散场的方向和大小。实验表明,选取合适的内、外垂直场参数,在电流的平顶段,能使等离子体稳定平衡于真空室小截面中心外侧3cm的位置,即在装置孔栏中心附近。
This article discusses the HL-1 device plasma balance. The symmetrical magnetic probe was used to measure the horizontal and vertical displacement of the plasma. The displacement of the plasma with time was given by the computer data processing system immediately. The influence of various stray fields existing in the device on the plasma balance is analyzed. The vertical stray measurement identifies the direction and magnitude of horizontal stray fields caused by the longitudinal field coils and the heating field windings. Experiments show that the choice of appropriate parameters of the vertical and vertical field, the flat top of the current plasma can make a stable equilibrium in the small section of the vacuum chamber 3cm outside the center of the position, that is, near the center hole in the device.