HOT-ELECTRON CHARACTERIZATION FROM K-ALPHA MEASUREMENTS IN HIGH-CONTRAST, P-POLARIZED, PICOSECOND LASER-PLASMA INTERACTIONS

被引:98
作者
CHEN, H
SOOM, B
YAAKOBI, B
UCHIDA, S
MEYERHOFER, DD
机构
[1] UNIV ROCHESTER,DEPT PHYS & ASTRON,ROCHESTER,NY 14623
[2] UNIV ROCHESTER,DEPT MECH ENGN,ROCHESTER,NY 14623
关键词
D O I
10.1103/PhysRevLett.70.3431
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页码:3431 / 3434
页数:4
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