Study on hot electrons in femtosecond laser-plasma interaction

被引：0

作者：

Zhang, J ^{[1
]}

Liang, TJ ^{[1
]}

Li, YT ^{[1
]}

Chen, LM ^{[1
]}

Wang, L ^{[1
]}

Xia, JF ^{[1
]}

Wei, ZY ^{[1
]}

Zhao, LZ ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China

来源：

HIGH-POWER LASERS IN ENERGY ENGINEERING | 2000年 / 3886卷

关键词：

hot electrons; femtosecond lasers; megagauss magnetic fields; density gradient; Faraday rotation;

D O I：

10.1117/12.375125

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The behaviors of hot electrons in femtosecond laser-plasma interaction have been studied systematically under laser irradiance of 5x10(15) Wcm(-2)mu m(2). A very directional jet emission of hot electrons with energies above 170 keV has been observed in the normal direction to the target surface. The angular distribution of the jet emission of hot electrons has been found to be dependent on the energy of hot electrons. By measuring the Faraday rotation angle of the backscattered emission, a magnetic field in the axial direction has been detected for the first time. The maximum value of the magnetic field was estimated to be as high as 1.76+/-0.7 Mgauss at such a modest irradiance. It is believed that this axial magnetic field is generated by the dynamo effect in the laser-plasma interaction.

引用

页码：332 / 341

页数：10

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