摘要
根据拍摄1.06μm长脉冲钕玻璃激光与LY12铝靶耦合产生蒸汽羽的干涉分幅照片,测出在t<50μs空气冲击波速度约为473m/s而蒸汽羽阵面扩散速度约为162m/s,运用蒸汽羽等离子体的有关热力学特性方程组,得到蒸汽羽等离子体的电子密度、电子温度、电离度和吸收系数的最大值分别为N_t≈3.1×10^(17)cm^(-3),T≈6096K,η≈0.014,α_(1.06μm)≈0.03cm^(-1)的结果。
Characterizations of the vapor plume from LY12 aluminum target irradiated by a focused normal mode pulsed Nd: glass laser beam have been studied by using of a plate shearing interferometer and the high speed photography. The frame photos show that the speed of shock wave in the air is about 473m/s,the vapor plume front is about 162m/s. By using the Abel inversion and Saha equations to analyze the interferogram of the vapor plume. Based on electron density is deduced to be about 3. 1×1017cm-1,the temperature about 6096K,ionicity about 0. 014, and optic absorption about 0. 03cm-1.
出处
《高压物理学报》
CAS
CSCD
北大核心
1992年第1期23-29,共7页
Chinese Journal of High Pressure Physics
关键词
激光
等离子体
蒸汽羽
辐照
铝靶
Laser interactions with materials,plasma diagnos.
