| Compton散射强光子流在等离子体通道中的传输特性 |
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| 引用本文： | 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 |
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| 作者姓名： | 吕健 郝东山 |
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| 作者单位： | 华北水利水电学院数学与信息科学系,郑州,450052;黄淮学院物理系,驻马店,463000 |
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| 基金项目： | 河南省教育厅自然科学基础研究计划项目（200510918002） |
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| 摘 要： | 给出了冷等离子体中高阶相对论下多光下非线性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。
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| 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 |
| 文章编号： | 0254-6086（2005）03-0207-06 |
| 收稿时间： | 2005-02-26 |
| 修稿时间： | 2005-02-262005-05-13 |
Propagation characteristics of the scattered laser by the Compton effect in plasma channels |
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| U 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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| Authors: | U Jian HAO Dong-shan |
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| Abstract: | In an under-dense plasma,the equation of the scattered laser with the multi-photon nonlinear Compton effect is given with higher-order-relativistic(HOR)effect. The effects of the propagation on the scattered laser in the plasma channel are studied with HOR 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 relativistic critical power. The condition of balance-solution of the beam spot size is also given. |
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| Keywords: | Multi-photon nonlinear Compton scattering Plasma channel Higher-order-relativistic Variational method |
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