1 MV低阻抗加速器主开关优化设计
Optimized design for main switch of 1 MV low-impedance accelerator
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摘要: 介绍了一种1 MV低阻抗加速器的结构及其对主开关系统的要求，并对确定使用的油介质开关进行了优化设计与模拟。优化后的结果显示，开关工作在1 MV时，放电电感约100 nH，分布电容约150 pF，充电电感约360 nH；开关的放电参数不会对波形造成过大的不良影响，充电参数不影响Marx发生器给形成线的充电时间，开关内部电场安全，变压器油与尼龙交界面不会发生闪络。设计后的开关与其它部件搭建起低阻抗加速器进行调试，加速器输出约700 kV，70 kA、脉宽150 ns的电子束，开关满足实验需求。Abstract: The structure of a 1 MV low-impedance accelerator and the design principles of its main switch were introduced. Optimized design and simulation of the oil switch, which was selected as the main switch, were carried out. The simulation showed when the switch was working at 1 MV, the discharge inductance was about 100 nH, the distributed capacitance was 150 pF, and the charging inductance was 360 nH. No unacceptable influence was caused by those distributed parameters. Simulation also showed that the electric field inside the main switch was safe, that is, no flashover would happen at the oil-nylon interface. The low-impedance accelerator was assembled with the optimized oil switch and produced 700 kV, 70 kA electron beams with 150 ns pulse width (FWHM). Preliminary tests show that the switc
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Key words:
- pulsed power /
- low-impedance accelerator /
- oil switch /
- discharge inductance /
- distributed capacitance
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