Compton 散射强光子流在等离子体通道中的传输特性

核聚变与等离子体物理 ›› 2005, Vol. 25 ›› Issue (3): 207-212.

Compton 散射强光子流在等离子体通道中的传输特性

吕健, 郝东山

(1. 华北水利水电学院数学与信息科学系, 郑州450052; 2. 黄淮学院物理系, 驻马店463000)

收稿日期:2005-02-26 修回日期:2005-05-13 出版日期:2005-09-15 发布日期:2013-09-02
作者简介:吕健( 1963- ) , 女, 河南泌阳县人, 华北水利水电学院数学与信息科学系讲师, 主要从事激光物理研究。
基金资助:
河南省教育厅自然科学基础研究计划项目( 200510918002)

Propagation characteristics of the scattered laser by the Compton effect in plasma channels

LÜ Jian,HAO Dong-shan

( 1. Department of Mathematics and Information Science, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450052; 2. Department of Physics, Huanghuai College, Zhumadian 463000)

Received:2005-02-26 Revised:2005-05-13 Online:2005-09-15 Published:2013-09-02

摘要/Abstract

摘要：

给出了冷等离子体中高阶相对论下多光子非线性Compton 散射的光子流在等离子体通道中的传输方程, 研究了高阶相对论效应对散射光子流传输的影响。在近轴近似下, 散射强光子流依然有较浅的" 势阱" 方程。当散射强光子流强度较大时, 高阶相对论效应变得更加重要: 它减小了散射光束宽的振荡幅度, 同时加快了散射光束宽的振荡速度。当散射强光子流功率大于或等于相对论临界功率时, 高阶相对论效应避免了散射强光子流强度随传输距离出现无限大的奇异性。给出了散射强光子流的平衡解存在的条件。

关键词: 多光子非线性Compton 散射, 等离子体通道, 高阶相对论, 变分法

Abstract:

In an under-dense plasma, the equation of the scattered laser with the mult-i photon nonlinear Compton effect is given with higher-order-relativistic(HOR) effect . The effects of the propagat ion on the scattered laser in the plasma channel are studied withHOR effect. A shallower potential well also exists for photon spot size in the paraxial approximation. HOR effect decreases the amplitude of photon spot size oscillation whereas accelerates its rate. Furthermore, it prevents the singularity of infinite intensity of photon beam when photon beam power is greater than or equal to the relativist ic crit ical power. The condition of balance-solution of the beam spot size is also given.

Key words: Mult-i photon nonlinear Compton scattering, Plasma channel;Higher-order-relativistic, Variational method

中图分类号:

O431

吕健, 郝东山. Compton 散射强光子流在等离子体通道中的传输特性[J]. 核聚变与等离子体物理, 2005, 25(3): 207-212.

Lü Jian,HAO Dong-shan. Propagation characteristics of the scattered laser by the Compton effect in plasma channels[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2005, 25(3): 207-212.

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