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Velocity measurements of exploding foil initiators (EFIs) using high speed photography

机译:使用高速摄影测量爆炸箔引发剂(EFI)的速度

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Exploding Foil Initiators (EFIs) are highly insensitive to mechanical shock and electrical interference, requiring a specific high current pulse for initiation. This allows the use of insensitive secondary explosives, making EFIs a safe and reliable means of initiating ex-plosives. When a high current is passed through the polymer-encapsulated metal bridge, a contained plasma is formed. This causes the film to expand rapidly to form a bubble or shear to form a flyer. This flyer can then impact the secondary explosive and cause initia-tion. Due to the very high speed at which these systems operate, a streak photography sys-tem was designed to characterise the behaviour of the polymer film flyers and determine the velocity. This paper will report the effect of bridge size, barrel length and stripline de-sign on flyer speed.
机译:爆炸箔引发剂(EFI)对机械冲击和电气干扰高度不敏感,因此需要特定的高电流脉冲来引发。这允许使用不敏感的二次炸药,使电喷装置成为引发爆炸物的安全可靠的方法。当高电流通过聚合物封装的金属桥时,形成了包含的等离子体。这导致薄膜迅速膨胀以形成气泡或剪切以形成飞行物。然后,该飞行物会撞击二次炸药并引发爆炸。由于这些系统的运行速度非常高,因此设计了一种条纹摄影系统来表征聚合物胶卷传单的行为并确定速度。本文将报告桥大小,桶长和带状线设计对飞行器速度的影响。

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