在背景气压为8×10-3-100 Pa范围内, 通过测量脉冲激光烧蚀平面Al靶产生的等离子体辐射谱的时间分辨特征, 比较空间不同点辐射的飞行时间轮廓的相对延迟, 从而得到辐射粒子速度及其空间分布. 利用绝热膨胀的理论和激波模型分别对背景气压小于0.6 Pa的结果和5 Pa时的结果作了分析, 并得出激波的波面基本上为柱对称.
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