测试爆炸箔起爆器的飞片速度

用双灵敏度VISAR测试爆炸箔起爆器的飞片速度历史。通过对飞片表面镀膜处理，消除了爆炸箔爆炸自发光产生的干扰，增加了飞片的反射率。在爆炸箔宽360 m，厚8.4 m，加速膛直径为1.2 mm，飞片厚0.12 mm，放电回路充电电压为4.5 kV，放电周期为750 ns的条件下，飞片最大速度为4.1 km/s，飞片加速时间约为150 ns，飞片达到最大速度的飞行距离约为0.3 mm。

Flyer velocity measurement of a exploding foil initiation system using a double-sensitivity VISAR

A double sensitivity VISAR system is used to measure the flyer velocity of electrically exploding foil initiator. The flyer surface is treated by plating a metal film, which eliminates the interference caused by bridge foil exploding, and enhances the reflectivity of the flyer surface. For a EFIs with a 0.36 mm wide and 8.4 μm thick bridge foil, and a 1.2 mm diameter and 0.12 mm thickness flyer, under 4.5 kV charge, the peak flyer velocity is 4.1 km/s, the accelerating duration is about 150 ns, and the displacement of the flyer is about 0.3 mm till  reaching the peak velocity.