Wang Guiji, Luo Binqiang, Zhang Xuping, Zhao Jianheng, Sun Chengwei, Tan Fuli, Chong Tao, Mo Jianjun, Wu Gang, Tao Yanhui
Institute of Fluid Physics, China Academy of Engineering Physics, China.
Rev Sci Instrum. 2013 Jan;84(1):015117. doi: 10.1063/1.4788935.
A pulsed power generator CQ-4 was developed to characterize dynamic behaviors of materials under ramp wave loading, and to launch high velocity flyer plates for shock compression and hypervelocity impact experiments of materials and structures at Institute of Fluid Physics, China Academy of Engineering Physics. CQ-4 is composed of twenty capacitor and primary discharge switch modules with total capacitance of 32 μF and rated charging voltage of 100 kV, and the storage energy is transmitted by two top and bottom parallel aluminum plates insulated by twelve layers of polyester film with total thickness of 1.2 mm. Between capacitor bank and chamber, there are 72 peaking capacitors with total capacitance of 7.2 μF and rated voltage of 120 kV in parallel, which are connected with the capacitor bank in parallel. Before the load, there is a group of seven secondary self-breaking down switches connected with the total circuit in series. The peaking capacitors and secondary switches are used to shape the discharging current waveforms. For short-circuit, the peak current of discharging can be up to 3 ~ 4 MA and rise time varies from 470 ns to 600 ns when the charging voltages of the generator are from 75 kV to 85 kV. With CQ-4 generator, some quasi-isentropic compression experiments under ramp wave loadings are done to demonstrate the ability of CQ-4 generator. And some experiments of launching high velocity flyer plates are also done on CQ-4. The experimental results show that ramp wave loading pressure of several tens of GPa on copper and aluminum samples can be realized and the velocity of aluminum flyer plate with size of 10 mm × 6 mm × 0.35 mm can be accelerated to about 11 km/s and the velocity of aluminum flyer plate with size of 10 mm × 6 mm × 0.6 mm can be up to about 9 km/s, which show that CQ-4 is a good and versatile tool to realize ramp wave loading and shock compression for shock physics.
中国工程物理研究院流体物理研究所研制了一台脉冲功率发生器CQ - 4，用于表征材料在斜波载荷作用下的动态行为，并发射高速飞片，以开展材料与结构的冲击压缩和超高速撞击实验。CQ - 4由20个电容器和初级放电开关模块组成，总电容为32 μF，额定充电电压为100 kV，储能通过两层由12层聚酯薄膜绝缘的上下平行铝板传输，聚酯薄膜总厚度为1.2 mm。在电容器组和腔室之间，有72个峰值电容器并联，总电容为7.2 μF，额定电压为120 kV，它们与电容器组并联连接。在负载之前，有一组7个二次自击穿开关与整个电路串联连接。峰值电容器和二次开关用于整形放电电流波形。对于短路情况，当发生器的充电电压在75 kV至85 kV之间时，放电峰值电流可达3至4 MA，上升时间在470 ns至600 ns之间变化。利用CQ - 4发生器，开展了一些斜波载荷作用下的准等熵压缩实验，以展示CQ - 4发生器的能力。同时也在CQ - 4上进行了一些发射高速飞片的实验。实验结果表明，在铜和铝样品上可实现几十吉帕的斜波载荷压力，尺寸为10 mm×6 mm×0.35 mm的铝飞片速度可加速到约11 km/s,尺寸为10 mm×6 mm×0.6 mm的铝飞片速度可达约9 km/s，这表明CQ - 4是实现冲击物理中斜波载荷和冲击压缩的一种性能良好且通用的工具。
