Influence of the Sequela Gas Accompanied with the Plasma Generated by Hypervelocity Impact

During the measurement of plasma generated by hypervelocity impact in the two-stage gas gun, the gas following the projectile might disturb the physical measurement of plasma signal. The triple probe, coil and pyrometer were used to detect how much the influence of the sequela gas. By comparison, the results show that the signal value of the sequela gas is relatively small and could not produce obvious influence to the measurement of plasma parameter.