The polarization effect of a laser in multiphoton Compton scattering  

作　　者：梁国华 吕清正 滕爱萍 李英骏 

机构地区：[1]State Key Laboratory for Geomechanics and Deep Underground Engineer,China University of Mining and Technology

出　　处：《Chinese Physics B》2014年第5期268-276,共9页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11374360);the National Basic Research Program of China(Grant No.2013CBA01504)

摘　　要：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 intensifies 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.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 intensifies 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.

关 键 词：multiphoton Compton scattering laser-dressed quantum electrodynamics （QED） cross section polarization 

分 类 号：O436.3[机械工程—光学工程]