【摘要】 本文分析了会聚自由振荡钕玻璃脉冲激光束辐照平面铝靶的汽化特性。在激光功率密度约100MW/cm~2下,由拍摄激光与靶相互作用产生射流发光的时间积分照片测得靶面的汽化压力约3.6MPa。把时间积分照片与高速分幅照片比较,证明在激光与靶相互作用一段时间后确实存在着马赫盘。更多还原

【Abstract】 The characteristics of aluminum larget vapor expansion induced by the Iodised beam of neodymium-glass pulsed laser operated in the normal mode are investigated in this paper. Under laser flux about 10MW/cm2. the Mach-disk 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 tree jet development, it is shown that the Mach-disk indeed oc-cured in the process of the target irradiated by the focused laser beam.更多还原