A weak-overdriven detonation mode for laser-produced plasma

Velocity of a laser supported detonation wave and pressure behind the LSD wave were measured to investigate one-dimensional propagation using a rectangular tube and a transversely excited atmospheric CO2 laser. One-dimensional Hugoniot analysis with using the rarefaction theory confirmed the one-dimensional propagation. At the termination timing, the piezoelectric pressure sensor at the tube wall measured 4.2 ± 0.2 atm and the estimated result was 4.3 atm. A pressure-volume diagram described the state transition from the initial state to weak overdriven-detonation state. Results revealed that the one-dimensional propagation of the LSD wave was succeed by the tube confinement.