Production of a monoenergetic electron bunch in a self-injected laser-wakefield accelerator

被引：19
作者：
Chang, C. -L.
Hsieh, C. -T.
Ho, Y. -C.
Chen, Y. -S.
Lin, J. -Y.
Wang, J.
Chen, S. -Y. [1 ]
机构：
[1] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan
[2] Natl Chung Cheng Univ, Dept Phys, Chiayi 621, Taiwan
[3] Natl Cent Univ, Dept Phys, Jhongli 320, Taiwan
[4] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan
来源：
PHYSICAL REVIEW E | 2007年 / 75卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.75.036402
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Production of a monoenergetic electron bunch in a self-injected laser-wakefield accelerator is investigated with a tomographic method which resolves the electron injection and acceleration processes. It is found that all the electrons in the monoenergetic electron bunch are injected at the same location in the plasma column and then accelerated with an acceleration gradient exceeding 2 GeV/cm. The injection position shifts with the position of pump-pulse focus, and no significant deceleration is observed for the monoenergetic electron bunch after it reaches the maximum energy. The results are consistent with the model of transverse wave breaking and beam loading for the injection of monoenergetic electrons. The tomographic method adds a crucial dimension to the whole array of existing diagnostics for laser beams, plasma waves, and electron beams. With this method the details of the underlying physical processes in laser-plasma interactions can be resolved and compared directly to particle-in-cell simulations.
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页数：10
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