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用于直线感应加速器的3.5 MeV注入器脉冲功率系统采用了感应叠加原理。整个系统包含了脉冲形成系统、触发系统以及感应腔负载。脉冲形成系统主要由Marx发生器和Blumlein脉冲形成线组成,产生12个脉宽约90 ns,幅度约 200 kV的高压脉冲,通过 12 个感应腔和变阻抗阴阳极杆,在阴阳极间隙处产生3.5 MV的二极管电压,由天鹅绒阴极发射强流电子束。触发系统主要由两级触发开关构成,严格控制 12 个高压脉冲的输出时间,时间分散性统计值小于1 ns(动作时间抖动)。采用该脉冲功率系统注入器能产生能量约3.5 MeV,电流2~3 kA的强流电子束。
The 3.5 MeV injector pulse power system for linear induction accelerators uses the principle of induction superposition. The entire system includes a pulse forming system, triggering system and cavity loading. The pulse forming system is mainly composed of the Marx generator and the Blumlein pulse forming line, which generates 12 high-voltage pulses with a pulse width of about 90 ns and an amplitude of about 200 kV through 12 sensing cavities and variable impedance yin and yang poles at the cathode-anode gap 3.5 MV diode voltage, high-current electron beam emitted by the velvet cathode. The triggering system is mainly composed of two-stage trigger switch, which strictly controls the output time of 12 high-voltage pulses. The statistical value of time dispersion is less than 1 ns (operation time jitter). Using this pulsed power injector, a strong current beam of about 3.5 MeV and 2 ~ 3 kA can be generated.