Acoustic diagnostics of the ignition threshold of laser supported detonation wave

Based on the phenomena of laser supported combustion or detonation wave induced by the interaction between the high-intensity laser and material,a new method is present for diagnosing the ignition threshold of laser supported detonation wave by measuring the jump of the sound peak pressure of laser-target plasma.The ignition threshold can be obtained by analyzing the jump stage between laser power density and the sound peak pressure of laser-target plasma,which generates on the surface of target due to interaction between Nd:YAG laser whose wavelength is 1064nm and aluminum target.The test results are largely in accord with those form other methods.The experiment result is helpful to understand the mechanism and process of the interaction between the laser and the matter.