Generation of relativistic electrons via interaction between ultra-short laser pulse and supersonic gas jet

被引：0

作者：

Uesaka, M ^{[1
]}

Zhidkov, A ^{[1
]}

Hosokai, T ^{[1
]}

Kinoshita, K ^{[1
]}

Watanabe, T ^{[1
]}

Yoshii, K ^{[1
]}

Ueda, T ^{[1
]}

Kotaki, H ^{[1
]}

Kando, M ^{[1
]}

Nakajima, K ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Nucl Engn Res Lab, Naka, Ibaraki, Japan

来源：

PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS | 2003年

关键词：

D O I：

10.1142/9789812705235_0031

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have studied generation of relativistic electrons by interaction between a high intensity ultra-short laser pulse (Ti:Sapphire, 12 TW, 50 fs, lambda=790 nm) and gas jet. In the experiment, spatial and energy distribution of energetic electrons produced by an ultra-short, intense laser pulse in a He gas jet are measured. They depend strongly on the contrast ratio and shape of the laser prepulse. In the case of a proper prepulse the electrons are injected at the shock front produced by the prepulse and accelerated by consequent plasma wake-field up to tens MeV forming a narrow-coned ejection angle. In the case of non-monotonic prepulse, hydrodynamic instability leads to a broader, spotted spatial distribution. The numerical analysis based on a 2D hydrodynamics (for the laser prepulse) and 2D particle-in-cell simulation justify the mechanism of electron injection and acceleration.

引用

页码：466 / 477

页数：12

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