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核聚变与等离子体物理 ›› 2006, Vol. 26 ›› Issue (4): 282-287.

• 研究报告 • 上一篇    下一篇

Compton散射对激光等离子体中光场和电子密度分布的影响

郝东山1,禹定臣2   

  1. (1. 黄淮学院电子科学与工程系,驻马店 463000;2. 黄淮学院信息工程系,驻马店 463000)
  • 收稿日期:2005-12-12 修回日期:2006-08-06 出版日期:2006-12-15 发布日期:2011-12-26
  • 作者简介:郝东山(1948-),男,河南西平县人,教授,主要从事激光物理与光纤通信基础理论研究。
  • 基金资助:

    河南省教育厅自然科学基础研究计划项目(200510918002)

The effects of Compton scattering on the light field and electron density profile in the laser plasma

HAO Dong-shan1,YU Ding-chen2   

  1. (1. Department of Electron Science and Engineering,Huanghuai University,Zhumadian 463000; 2. Department of Information Engineering,Huanghuai University,Zhumadian 463000)
  • Received:2005-12-12 Revised:2006-08-06 Online:2006-12-15 Published:2011-12-26

摘要:

应用电子和多光子集团非弹性碰撞模型和冷等离子体模型,研究了飞秒强激光与线性等离子体发生多光子非线性Compton散射时,散射激光与入射激光形成的飞秒耦合激光场对线性等离子体层中光场和电子密度分布的影响。研究发现,在耦合激光的有质动力作用下,电子密度分布和离子密度分布比Compton散射前的偏离更加严重,电子密度的变化比离子密度的变化更快,产生的静电场更强。即使耦合激光场非常弱,电子的运动仍表现出相对论效应,仍有静电场存在。

关键词: 飞秒激光, 等离子体, 电子密度, Compton散射

Abstract:

Under the action of the femto-second laser, when the multi-photon nonlinear Compton scattering takes place in the linear plasma, the effects of the femto-second coupling laser field formed by the scattering laser and incident laser on the light field and electron density profile in the linear plasma have been studied using the model of the inelastic collision between the electron and multi-photon group and the model of the cold plasma. The results show that under the action of the ponderomotive force of the coupling laser, there are a larger divergence of the density profile of the electron and ion in the laser-plasma than that without Compton scattering, the faster change of the electron density than the ion density,and the stronger electrostatic field than that without Compton scattering. Even if the coupling laser field is the very small and weak,there still are the relativistic effects of the electron motion and the electrostatic field.

Key words: Femto-second laser, Plasma, Electron density, Compton scattering

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