“聚龙一号”装置同步性实验研究北大核心CSCD

分析了"聚龙一号"装置同步控制时序及Marx发生器、主开关、自击穿水开关工作状态对装置同步性的影响,Marx发生器的同步性影响装置的能量传输效率,主开关和自击穿水开关的同步性共同决定装置的同步性。实现装置精确同步的关键,即每台激光器经过左右分光后同时触发2个主开关导通,12台激光器可以独立调整精确的出光时间,用下方的主开关比上方的提前20ns导通的方式来修正传输线长度上的差异,将自击穿水开关的电极间隙设置为合适的距离来控制其导通时间。实验结果表明,Marx发生器同步性抖动为11ns,主开关和自击穿水开关上下分组的平均同步性抖动分别为4ns和10ns,"聚龙一号"装置的同步性抖动为6ns。在同一负载参数下,磁绝缘传输线和负载电流具有较好的重复性。

PTS experimental study on synchronization

The time sequence control of the Marx generators, laser-triggered gas switches(LTS), self-break water switches (WS) which affects the PTS synchronization was studied. Synchronization of Marx generators affects energy efficiency of transmission process and PTS synchronization is mainly determined by LTS and SW. The key to achieve precise synchronization of the PTS is to independently and precisely adjust the trigger time of the 12 lasers, each laser is split into two beams used to trigger two laser triggered gas switches (LTGS). The LTGSs in the upper layer of PTS are triggered 20 ns later than the LTGSs in the lower layer to compensate the transmission time difference caused by length different between the transmission lines in the upper layer and the lower layer. The gap distances of the electrodes of the self-breaking water switches are set to suitable values to adjust the switching time. Experiments show that the synchronization jitters of the Marx generators, the main switches, the water switches, and the tri-plate transmission lines are 11, 4, 10 and 6 ns respectively. The 24 modules were well synchronized for the experimental shots. Currents of magnetically insulated transmission line (MITL) and load showed good repeatability with similar load.