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KTX反场箍缩装置的主要参数介于RFX装置与MST装置之间。反场箍缩的外加纵场需跟随等离子体电流的演化而变化,同时由于RFP中的磁面对于外部特别是等离子体边界处的径向磁场较敏感,所以需外部线圈的磁场更加精细,这对于线圈的磁场分布、误差场以及波纹度等的设计提出了更高的要求。根据KTX物理目标参数要求,提出矩形和楔形截面纵场磁体线圈设计方案,借助有限元软件和程序分析了其电磁场空间分布和结构受力大小。结果表明,6.4°楔形截面方案相比矩形截面方案在控制误差场方面更具有可行性。
The main parameters of the KTX reverse field pinch device are between the RFX device and the MST device. The additional longitudinal field of the anti-field pinch needs to follow the evolution of the plasma current and at the same time the magnetic field of the external coil needs to be finer because the magnetic face in the RFP is more sensitive to the radial magnetic field at the outside, especially at the plasma boundary For the coil magnetic field distribution, error field and waviness and other design put forward higher requirements. According to the requirements of KTX physical target parameters, the rectangular and wedge cross-sectional field coil design scheme is proposed. The spatial distribution of the electromagnetic field and the force of the structure are analyzed by finite element software and program. The results show that the 6.4 ° wedge section scheme is more feasible than the rectangular section scheme in controlling the error field.