The polarization effect of a laser in multiphoton Compton scattering

The polarization effect of a laser in multiphoton Compton scattering
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多光子康普顿散射中激光的偏振效应

DOI:
10.1088/1674-1056/23/5/054103
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发表时间:
2014-03
期刊:
影响因子:
1.7
通讯作者:
Li Ying-Jun
Li Ying-Jun
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Liang Guo-Hua;Lu Qing-Zheng;Teng Ai-Ping;Li Ying-Jun

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利用研究平面电磁场与带电粒子相互作用的非微扰理论--激光修饰量子电动力学(QED)方法,研究了强激光束中的多光子康普顿散射.为了在真实的实验条件下进行分析,推导了实验室坐标系与初始静止坐标系之间的洛伦兹变换。分析了散射光子的能量,以及不同激光强度和偏振以及不同电子速度下的散射截面。在实验室坐标系中,对于固定数目的吸收光子,散射后电子能量不变,在特定的电子速度下,研究了发射光子的角分布。结果表明,较高的激光强度抑制了少量激光光子的吸收,而增强了大量激光光子的吸收。比较了不同偏振态下的非线性康普顿散射,发现线偏振激光更适合于产生非线性康普顿散射。
The multiphoton Compton scattering in a high-intensity laser beam is studied by using the laser-dressed quantum electrodynamics (QED) method, which is a non-perturbative theory for the interaction between a plane electromagnetic field and a charged particle. In order to analyze in the real experimental condition, a Lorentz transformation for the cross section of this process is derived between the laboratory frame and the initial rest frame of electrons. The energy of the scattered photon is analyzed, as well as the cross sections for different laser intensities and polarizations and different electron velocities. The angular distribution of the emitted photon is investigated in a special velocity of the electron, in which for a fixed number of absorbed photons, the electron energy will not change after the scattering in the lab frame. We obtain the conclusion that higher laser intensities suppress few-laser-photon absorption and enhance more-laser-photon absorption. A comparison between different polarizations is also made, and we find that the linearly polarized laser is more suitable to generate nonlinear Compton scattering.
DOI: 10.1006/jmaa.1994.1194
发表时间: 1994-06
影响因子: 1.3
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G. Dattoli;C. Chiccoli;S. Lorenzutta;G. Maino;A. Torre
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Compton, AH
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