Collision off-axis position dependence of relativistic nonlinear Thomson inverse scattering of an excited electron in a tightly focused circular polarized laser pulse  

作　　者：王禹博 杨青屿 常一凡 林宗熠 田友伟 Yubo Wang;Qingyu Yang;Yifan Chang;Zongyi Lin;Youwei Tian(Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Chinese Physics B》2024年第1期344-354,共11页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.10947170/A05 and 11104291);the Natural Science Fund for Colleges and Universities in Jiangsu Province (Grant No.10KJB140006);the Natural Sciences Foundation of Shanghai (Grant No.11ZR1441300);the Natural Science Foundation of Nanjing University of Posts and Telecommunications (Grant No.NY221098);the Jiangsu Qing Lan Project for their sponsorship。

摘　　要：This paper presents a novel view of the impact of electron collision off-axis positions on the dynamic properties and relativistic nonlinear Thomson inverse scattering of excited electrons within tightly focused, circularly polarized laser pulses of varying intensities. We examine the effects of the transverse ponderomotive force, specifically how the deviation angle and speed of electron motion are affected by the initial off-axis position of the electron and the peak amplitude of the laser pulse. When the laser pulse intensity is low, an increase in the electron's initial off-axis distance results in reduced spatial radiation power, improved collimation, super-continuum phenomena generation, red-shifting of the spectrum's harmonic peak, and significant symmetry in the radiation radial direction. However, in contradiction to conventional understandings,when the laser pulse intensity is relatively high, the properties of the relativistic nonlinear Thomson inverse scattering of the electron deviate from the central axis, changing direction in opposition to the aforementioned effects. After reaching a peak, these properties then shift again, aligning with the previous direction. The complex interplay of these effects suggests a greater nuance and intricacy in the relationship between laser pulse intensity, electron position, and scattering properties than previously thought.

关 键 词：relativistic nonlinear Thomson inverse scattering off-axis collision radiation angle distribution tightly focused laser pulse 

分 类 号：O412.1[理学—理论物理]