Four-dimensional imaging of the initial stage of fast evolving plasmas
Four-dimensional imaging of the initial stage of fast evolving plasmas
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DOI：
10.1063/1.3521387
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发表时间：
2010-11
影响因子：
4
通讯作者：
P. Zhu;Zhong-zhe Zhang;Long Chen;Jun Zheng;Runze Li;Weimin Wang;Junjie Li;Xuan Wang;Jianming Cao;Dong Qian;Z. Sheng;Jie Zhang
中科院分区：
文献类型：
--
作者：
P. Zhu;Zhong-zhe Zhang;Long Chen;Jun Zheng;Runze Li;Weimin Wang;Junjie Li;Xuan Wang;Jianming Cao;Dong Qian;Z. Sheng;Jie Zhang
利用具有四维诊断能力的超快电子探针，对10 14 W/cm 2激光辐照金属靶产生的快速演化等离子体的初始阶段进行了具有皮秒时间分辨率的真实的研究。相关联的强瞬态电场被确定为具有两个分量，这两个分量或者聚焦探测电子束或者散焦探测电子束。这个场对探测电子束的影响可以通过一个自膨胀的电荷云来再现，该电荷云包含约5×107个超热电子，最外层以1.2×107 m/s的平均速度膨胀。
Using an ultrafast electron probe capable of four-dimensional diagnosis, the initial stage of fast evolving plasmas produced by a 1014 W/cm2 laser irradiation of a metal target was investigated in real time with picosecond time resolution. The associated strong transient electric field was identified to have two components, which either focus or defocus the probe electron beam. The effects of this field on the probe electron beam can be reproduced by a self-expanding charge cloud containing about 5×107 suprathermal electrons with the outermost layer expanding at an average speed of 1.2×107 m/s.