Generation of hemispherical fast electron waves in the presence of preplasma in ultraintense laser-matter interaction

Yang Xiaohu; Ma Yanyun; Xu Han; Yu Mingyang; Shao Fuqiu

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Generation of hemispherical fast electron waves in the presence of preplasma in ultraintense laser-matter interaction

Yang Xiaohu 1,Ma Yanyun 1,Xu Han 2,Yu Mingyang 3,Shao Fuqiu 1 *

1.College of Science, National University of Defense Technology, Changsha 410073

2.School of Computer Science, National University of Defense Technology, Changsha 410073

3.Department of Physics, Zhejiang University, Hangzhou 310027

*Correspondence author

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Funding: NUDT （No.B100204）, the Specialized Fund for the Doctoral Program of Higher Education （No.20114307110020）, NSFC （No.10975185 and 10976031）, the InnovationFoundation for Postgraduate of Hunan Province （No.CX2010B008 ）

Opened online: 9 January 2013

Accepted by: none

Citation: Yang Xiaohu,Ma Yanyun,Xu Han.Generation of hemispherical fast electron waves in the presence of preplasma in ultraintense laser-matter interaction[OL]. [ 9 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4512050

Hemispherical electron plasma waves generated from ultraintenselaser interacting with a solid target having asubcritical preplasma is studied using particle-in-cell simulation.As the laser pulse propagates inside the preplasma, it becomesself-focused due to the response of the plasma electrons to theponderomotive force. The electrons are mainly heatedvia betatron resonance absorption, and their thermal energy canbecome higher than the ponderomotive energy. The hot electronseasily penetrate through the thin solid target and appear behind itas periodic hemispherical shell-like layers separated by the laserwavelength.

Keywords:physics of plasma; self-focusing; betatron resonance absorption; hemispherical wave

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