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1995年以来在HL-1M装置上成功地进行了LHCD实验,取得了丰硕的成果。近两年来,为了在HL-1M上做更加深入的LHCD物理实验,对LHCD微波系统提出了更高的要求。这样原有的电源已不适应新的要求。第一,要求电源系统输出两路负高压,供给微波系统的两只速调管,以达到MW级的微波功率输出。第二,要求在脉冲宽度大于1s的长脉冲方式下工作。第三,由于LHCD微波系统的相位测量与反馈控制调试的要求,电源应具有两路连续脉冲输出,且脉冲宽度大于5ms。为了保证实验顺利进行,必须对电源系统的其中一台脉冲调制器进行技术改造。包括调整管的栅极控制电路进行重新设计;改善调整管的冷却。这也是LHCD电源系统所面临的重大技术难题。
LHCD experiments have been successfully carried out on HL-1M devices since 1995, and great achievements have been made. In the past two years, in order to do more in-depth LHCD physics experiment on HL-1M, LHCD microwave system has put forward higher requirements. This original power supply has not adapted to the new requirements. First, the power system is required to output two negative high voltages to the two klystrons of the microwave system to achieve microwave power output of MW level. Second, it is required to work in the long pulse mode with the pulse width greater than 1s. Third, due to the phase measurement and feedback control debugging requirements of the LHCD microwave system, the power supply should have two continuous pulse outputs and the pulse width is greater than 5ms. In order to ensure the smooth progress of the experiment, one of the power system pulse modulator must be reformed. Including the adjustment of the gate control circuit tube redesign; to improve the cooling tube. This is also a major technical challenge facing the LHCD power system.