Warm photoionized plasmas created by soft-x-ray laser irradiation of solid targets
Warm photoionized plasmas created by soft-x-ray laser irradiation of solid targets
复制标题
DOI：
10.1364/josab.25.000b32
复制
发表时间：
2008-07-01
影响因子：
1.9
通讯作者：
Rocca, Jorge J.
中科院分区：
文献类型：
--
作者：
Berrill, Mark;Brizuela, Fernando;Rocca, Jorge J.
报道了软X射线激光辐照固体靶产生的热等离子体的研究，其中单光子光致电离是主要的能量吸收机制。低吸收(硅，Z=14)和高吸收(铬，Z=24，银，Z=47)靶被46.9 nm波长软X射线激光加热，脉冲宽度类似于1 ns。得到的光谱与1 1/2维模拟结果一致，表明硅等离子体明显更冷，电离更少，证实了与光学激光产生的等离子体相比，等离子体的性质在很大程度上由靶材料的吸收系数决定。(C)2008年美国光学学会。
We report the study of warm plasmas created by soft-x-ray laser irradiation of solid targets in which single-photon photoionization is the dominant energy absorption mechanism. Low-absorption (silicon, Z=14) and high-absorption (chromium, Z=24, and silver, Z=47) targets were heated by similar to 1 ns duration pulses from a 46.9 nm wavelength soft-x-ray laser. The spectra obtained agree with 1 1/2-dimension simulations in showing that the Si plasmas are significantly colder and less ionized, confirming that in contrast to plasmas created by optical lasers the plasma properties are largely determined by the absorption coefficient of the target material. (C) 2008 Optical Society of America.