HOT-ELECTRON CHARACTERIZATION FROM K-ALPHA MEASUREMENTS IN HIGH-CONTRAST, P-POLARIZED, PICOSECOND LASER-PLASMA INTERACTIONS
HOT-ELECTRON CHARACTERIZATION FROM K-ALPHA MEASUREMENTS IN HIGH-CONTRAST, P-POLARIZED, PICOSECOND LASER-PLASMA INTERACTIONS
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DOI：
10.1103/physrevlett.70.3431
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发表时间：
1993-05-31
影响因子：
8.6
通讯作者：
MEYERHOFER, DD
中科院分区：
文献类型：
--
作者：
CHEN, H;SOOM, B;MEYERHOFER, DD
在皮秒激光与等离子体相互作用中，观察到强的K α发射，具有高强度对比度，p偏振，皮秒激光脉冲。用Monte Carlo方法模拟了不同厚度Al覆盖Si衬底的K α发射。结果表明，在固体材料中存款能量的超热电子具有3 keV的温度和携带的入射激光能量的10%。偏移的K α发射表明，固体被加热到35 eV的温度高达5000埃的目标表面，这是一致的预热的热电子。
Strong Kalpha emission is observed in picosecond laser-plasma interactions with high-intensity-contrast, p-polarized, picosecond laser pulses. Kalpha emission from Si substrates overlaid with various thicknesses of Al is compared with a Monte Carlo simulation. The results show that the hot electrons which deposit their energy in the solid material have a 3-keV temperature and carry 10% of the incident laser energy. The shifted Kalpha emission indicates that the solid is heated to a temperature of 35 eV up to 5000 angstrom from the target surface, which is consistent with the preheat of the hot electrons.