用于冲击诊断的成像速度干涉仪
Imagingvelocity interferometer system for any reflector for shock diagnostics
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摘要: 为了诊断测量激光驱动冲击波，研制了具有空间分辨力的成像型速度干涉仪。该干涉仪主要包括输入部分、像传递部分及干涉部分，探测光采用波长为532 nm的单纵模激光。 在靶位放置一分线板，经过测量，其空间分辨力小于10 μm。基于天光KrF准分子激光系统的参数，设计并自制含有烧蚀层的单台阶金属靶，利用成像型速度干涉仪测量到了金属铝靶内的冲击波速度。Abstract: An imaging-velocity interferometer system for any reflector (VISAR) has been implemented at the “Heaven-I” excimer laser system, which is applied to laser-driven shock experiments as a method for equation of state (EOS) measurement. It contains three parts: input system, imagingrelay system and interferometer system, and a single longitudinal mode laser with 532 nm wavelength is used as the probe light. The imaging VISAR performs at spatial resolutions better than 10 μm. In the experiment with a single-step aluminium target, the shock velocity and the free surface velocity could be measured simultaneously．
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