Methods for obtaining the actual radial distribution of the fragment velocity through X-ray photography

Short charges are typically used in the measurement of radial fragment velocity distributions by pulsed X-ray photography, due to the arrangement constraint of X-ray tubes. However, the radial velocity distribution of the one-line asymmetrical initiation was found to be significantly influenced by the end rarefaction waves. This means that the fragment velocity distribution measured using short charges cannot reflect the real influence of the initiation styles or warhead designs. This study proposes new methods for measuring the radial velocity distribution using X-ray photography while eliminating the effect of end-rarefaction waves. It can provide important references for related X-ray test methods and the development of high-lethality warheads.