CAJ | 학술논문

通过对电子在线偏振脉冲激光场的非弹性散射过程的3D计算模拟,研究了电子在强激光场中非弹性散射及加速效应与激光偏振方向之间的变化规律。结果发现,在激光场强Q0<10时,电子的最大出射能量几乎与激光的偏振方向无关,这与传统的有质动力势模型一致;在Q0=10时,电子的最大出射能量开始敏感于激光的偏振方向;当Q0>10时,电子的出射能量非常敏感于激光的偏振方向,这与传统的有质动力势模型相违。实验结果对于研究激光对电子的加速效应和未来激光加速器的设计有重要意义。
통과대전자재선편진맥충격광장적비탄성산사과정적3D계산모의,연구료전자재강격광장중비탄성산사급가속효응여격광편진방향지간적변화규률。결과발현,재격광장강Q0<10시,전자적최대출사능량궤호여격광적편진방향무관,저여전통적유질동력세모형일치;재Q0=10시,전자적최대출사능량개시민감우격광적편진방향;당Q0>10시,전자적출사능량비상민감우격광적편진방향,저여전통적유질동력세모형상위。실험결과대우연구격광대전자적가속효응화미래격광가속기적설계유중요의의。
The effect of laser polarization direction on electron inelasticscattering and acceleration with extra-intense linear-polarized pulsed lasers was studied by means of 3D simulation of the relativistic Newton-Lorentz equation of motion. It has been found that when Q0 is less than ten (Q0=eE/meωc measures the laser intensity)，there is no noticeable polarization effect，which is consistent with the traditional ponderomotive potential model. While Q0>30，the electron scattering and acceleration are found to be sensitive to the laser polarization direction. Tthe characteristics of the polarization effect examined were in details. This study is of significance not only in understanding the features of non-linear Compton scattering which underlies the acceleration effect， but also in experimentally testing the laser-driven electron acceleration as well as designing laser accelerator in the future.