CSNS的kicker电源闸流管触发特性分析

针对中国散裂中子源kicker电源的闸流管，研制了基于大电流脉冲预电离和高压脉冲点火原理的双脉冲触发器，提高了闸流管的触发导通稳定性；同时研究了氢流、灯丝电流及预点火电流等参数对闸流管状态的影响；针对闸流管误漏触发现象，研制了基于单稳态及逻辑门电路构成的误漏触发检测电路，能够对闸流管的状态进行准确分析及预判；最后对kicker脉冲电源系统进行了年度分析总结。

Thyratron trigger characteristics analysis of CSNS kicker power supply

Hydrogen thyratron still plays an important role in the field of high voltage and high current technology, how to adjust the working parameters of thyratron is an important topic in pulse modulation technology. The performance and life of thyratron depend on thyratron trigger to a great extent. To optimize the performance of thyratron and make it preionize more sufficiently, the high current pulse preionization technology is adopted by analyzing the thyratron triggering characteristics. A thyratron double pulse trigger based on kicker pulse power supply of China spallation neutron source is developed. The trigger has excellent performance such as nanosecond rising edge, low jitter and high current output. The effects of different reservoir heater current, cathode heater current and pre-ignition parameters on the thyratron state are studied, aiming at the problem of mis-conduction and leak conduction of thyratron, a detection circuit based on monostable circuit and CMOS gate circuit is developed, which can accurately analyze and predict the state of thyratron. Finally, the fault of kicker pulse power supply system is analyzed and summarized annually.