【摘 要】
：
Ramp-wave compression experiment to balance the high compression pressure generation in aluminum and x-ray blanking effect in transparent window is demonstrated
【机 构】
：
Research Center of Laser Fusion, China Academic of Engineering and Physics, Mianyang 621900“,”Collab
论文部分内容阅读
Ramp-wave compression experiment to balance the high compression pressure generation in aluminum and x-ray blanking effect in transparent window is demonstrated with an imaging velocity interferometer system for any reflector (VISAR) on ShenGuang-Ⅲ prototype laser facility.The highest pressure is about 500 GPa after using the multilayer target design A1/Au/A1/LiF and ～1013 W/cm2 laser pulse illuminated on the planar A1 target,which generates the spatial uniformity to ＜1％ over 500 μm on the ablation layer.A 2-μm-thick Au layer is used to prevent the x-ray from preheating the planar ablation A1 layer and window material LiF.The imaging VISAR system can be used to record the abrupt loss of the probe beam (λ =532 nm) caused by absorption and reflection of 20-μm,30-μm and 40-μm-thick A1,i.e.,the blanking effect.Although there are slight shocks in the target,the peak pressure 500 GPa,which is the highest data up to now,is obtained with ramp-wave compression.
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