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偏转磁体是中性束注入器的关键部件之一,它安装在中性束注入器真空室内部。为适应核聚变研究装置对中性束注入器高能量、长脉冲、稳态运行的要求,对其偏转磁体原先励磁线圈的水冷系统进行了分析,提出增加水冷抽头的方法完成了改进设计,并对改进前后线圈的冷却能力进行了实验测试。测试结果显示,当中性束注入器长脉冲稳态运行时,改进后的水冷结构能及时带走偏转磁体励磁线圈产生的热量;冷却水的进出口水温差约21 oC;偏转磁体线圈导体表面的温度约45 oC;改进设计水冷系统性能得到优化,满足了EAST-NBI高参数、稳态运行的要求。
Deflecting magnets are one of the key components of a neutral beam injector that mounts inside the neutral beam injector vacuum chamber. In order to meet the requirement of high energy, long pulse and steady operation of neutral beam injector for nuclear fusion research device, the water cooling system of the original excitation coil of the deflection magnet was analyzed. The method of adding water cooling tap was proposed to improve the design The cooling capacity of the coil before and after the improvement was tested experimentally. The results show that when the long pulse of neutral beam injector runs steadily, the improved water-cooling structure can take away the heat generated by the exciting coil of the deflection magnet in time. The temperature difference between the inlet and outlet of the cooling water is about 21 oC. The temperature of the deflection coil About 45 oC; to improve the design of water cooling system performance is optimized to meet the EAST-NBI high parameters, steady-state operation requirements.