软X射线激光偏折法测量激光等离子体电子密度分布

Measurement of electron density distribution in a laser plasma with soft X-ray laser deflectometry

利用脉宽约为 5 0ps的类镍 银 13 9nm软X射线激光作为探针 ,探测由脉宽 80ps的驱动激光打C8H8靶产生的等离子体在 1ns后的电子密度分布信息 ,获得了清晰的莫尔条纹图像 .对结果的处理 ,给出了峰值电子密度为 1 1× 10 2 1 cm- 3 。

A soft X-ray laser deflectometer was used to measure electron density distribution of a laser-plasma produced with a 80ps duration drive laser pulse (lambda = 1.053mum) irradiating a C8H8 plasma target. Using a soft X-ray laser beam (lambda = 13.9nm) of 50ps pulse duration, a moire deflectogram was created about 1ns after the end of drive laser pulse. Analysis of moire deflectogram gave a peak density of 1.1 x 10(21)cm(-3). A preliminary explanation was made on the disappearance of the moire stripes near the target surface.