Abstract:
The characteristics of aluminum target vapor expansion induced by the focused beam of neodymium-glass pulsed laser operated in the normal mode are investigated in this paper. Under laser flux about 10 MW/cm2, the Mach-dish characteristic parameters were measured by a time-integrated photo of the free jet, then the vapor pressure on target in the atmosphere is calculated. It is about 3.6 MPa. The time-integrated photo is compared with the high-speed photo of the free jet development, it is shown that the Mach-dish indeed occurred in the process of the target irradiated by the focused laser beam.
下载:
