预放系统 20 kJ能源是为激光预放大器棒状氙灯提供泵浦脉冲的能源系统, 是神光 -Ⅲ主机高功率固体激光装置的重要组成部分。预放 20 kJ系统能源触发放电的稳定性严重制约预放系统的调试效率和正式的激光打靶效率。针对预放能源系统在与 A1/A2/A3光束组预放系统棒状放大器联合调试过程中发现存在提前放电、放电不同步和不放电等问题, 开展了预放 20 kJ能源系统触发放电的稳定性研究, 提出了相应的解决措施并通过试验验证, 将 20 kJ能源系统触发放电的稳定性大幅提高。

Pre-release 20 kJ energy system provides pump pulse for the rod xenon lamp of laser pre-amplifier, which is an important part of SG-Ⅲ host high power solid laser device. The stability of pre-placed 20 kJ system energy trigger discharge seriously restricts the debugging efficiency of pre-placed system and the formal laser targeting efficiency. The situations of early discharge, non-synchronous discharge and not discharge are found during the joint debugging process of the pre-placed energy system and A1/A2/A3 beam group pre-placed system rod amplifier. The stability of pre-placed 20 kJ energy system trigger discharge is studied, and corresponding measures are put forward and tested, which can improve the trigger discharge stability of 20 kJ energy system significantly.