Large amplitude electromagnetic solitons in intense laser plasma interaction  

作　　者：李百文 Ishiguro S Skoric M M 

机构地区：[1]Institute of Applied Physics and Computational Mathematics, Beijing 100088, China [2]The Graduate University/or Advanced Studies and National Institute/or Fusion Science, Toki 509-5292, Japan

出　　处：《Chinese Physics B》2006年第9期2046-2052,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 10575015, 10445003, 10335020 and 10375011）, the National Key Laboratory of Laser Fusion, China （Grant No 51480010205ZW0901）, the Scientific Research Foundation for Returned 0verseas Chinese Scholars, State Education Ministry and the Foundation of China Academy of Engineering Physics （Grant No 20060217）.

摘　　要：This paper shows that the standing, backward- and forward-accelerated large amplitude relativistic electromagnetic solitons induced by intense laser pulse in long underdense collisionless homogeneous plasmas can be observed by particle simulations. In addition to the inhomogeneity of the plasma density, the acceleration of the solitons also depends upon not only the laser amplitude but also the plasma length. The electromagnetic frequency of the solitons is between about half and one of the unperturbed electron plasma frequency. The electrostatic field inside the soliton has a one-cycle structure in space, while the transverse electric and magnetic fields have half-cycle and one-cycle structure respectively. Analytical estimates for the existence of the solitons and their electromagnetic frequencies qualitatively coincide with our simulation results.This paper shows that the standing, backward- and forward-accelerated large amplitude relativistic electromagnetic solitons induced by intense laser pulse in long underdense collisionless homogeneous plasmas can be observed by particle simulations. In addition to the inhomogeneity of the plasma density, the acceleration of the solitons also depends upon not only the laser amplitude but also the plasma length. The electromagnetic frequency of the solitons is between about half and one of the unperturbed electron plasma frequency. The electrostatic field inside the soliton has a one-cycle structure in space, while the transverse electric and magnetic fields have half-cycle and one-cycle structure respectively. Analytical estimates for the existence of the solitons and their electromagnetic frequencies qualitatively coincide with our simulation results.

关 键 词：particle-in-cell （PIC） Raman cascade photon-condensation relativistic EM soliton 

分 类 号：O431.2[机械工程—光学工程]