摘要
设计了一套爆炸箔起爆装置,通过精确控制桥箔-飞片-加速腔三者的定位,在飞片表面镀一定厚度的铝膜(铝膜的质量与飞片的质量相比可忽略),合理选择VISAR探头的工作距离和与干涉腔延迟时间相关的条纹常数,屏蔽测试系统以及加设滤光片等,利用VISAR测试技术有效解决了小尺寸飞片速度的测试问题。给出了两种尺寸0.7mm×0.025mm和0.5mm×0.025mm飞片的速度测试结果。结果表明,采取新的措施后,获得了信噪比好、能正确反映爆炸箔起爆器驱动飞片物理过程的信号和飞片速度历史。
An exploding foil initiator was designed. The question of the velocity measurement of smallsize flyer was effectively solved by adopting the measures as follows: (1) accurately control the orientation of bridge foil, flyer and barrel; (2) put a thin aluminum film on the surface of the flyer and the mass of the aluminum film can be neglected compared with that of the flyer; (3) reasonably choose the work distance of the VISAR probe and the fringe constants related with the time delay of interference cavity; (4) shield measuring system and use the optical filter. The velocity measurement results of the flyers with two different sizes of Φ0.7 mm×0. 025mm and Φ0.5 mm×0. 025 mm were given. Compared with the results by Weingart R C, the obtained results after taking the measures above are with good signal-to-noise ratios, and can reflect the physical essence of exploding foil initiator driving flyer.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2008年第1期28-32,共5页
Explosion and Shock Waves
关键词
爆炸力学
速度测量
VISAR
小尺寸飞片
爆炸箔起爆器
mechanics of explosion
velocity measurement
VISAR
small size flyer
exploding foil in- itiator