圆偏振激光强度对电子辐射特性的影响
CSTR:
作者:
作者单位:

(1.南京邮电大学 贝尔英才学院,江苏 南京 210023;2.南京邮电大学 理学院,江苏 南京 210023)

作者简介:

田友伟 (1980-),男,博士,副教授,硕士生导师,主要从事激光与物质相互作用方面的研究 。

通讯作者:

中图分类号:

O411.3

基金项目:

国家自然科学基金(10947170/A05, 11104291) 资助项目


Influence of circularly polarized laser intensity on electron radiation characteristics
Author:
Affiliation:

(1.Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China;2.College of Science, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China)

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    根据汤姆逊散射理论,借助计算机数值模拟,主要研究了圆偏振激光脉冲强度变化对电子辐射能量频谱、峰值辐射方向辐射特性及空间谱的影响。结果表明,后向辐射和峰值辐射频谱皆出现频谱偏移、展宽现象,且随着激光强度增大变得更为显著。后向辐射频谱只存在基波,随着激光强度增大,峰值幅度减小,辐射值逐渐连续。峰值辐射则会产生高次谐波,峰值幅度与激光强度呈正相关,频移增大使频谱发生重叠,在超强激光作用下,产生连续光谱。本文进一步对峰值辐射功率方向的电子辐射特性进行了讨论,发现辐射功率脉宽与辐射最大方向极角值随激光强度变化具有相似特性,皆在某些相同特殊激光强度下发生跳变。电子辐射功率空间分布以传播方向为轴,呈现对称性,当激光强度过大时,此种对称性被打破。本次研究结果为后续深入研究圆偏振激光对电子辐射特性的影响提供了契机。

    Abstract:

    Based on Thomson scattering theory and computer numerical simulation,the influence of circularly polarized laser pulse intensity variation on electron radiation energy spectrum,radiation characteristics in peak radiation direction and space spectrum is studied in this paper.The results show that the spectrum of both backward radiation and peak radiation is shifted and broadened,and this phenomenon becomes more significant with the increase of laser intensity.There is only fundamental wave in the backward radiation spectrum.With the increase of laser intensity,the peak amplitude decreases,and the radiation value is gradually continuous.The peak radiation will produce high order harmonics.The peak amplitude is positively correlated with the laser intensity.As the frequency shift increases,the spectrum overlaps. What′s more,the frequency shift results in continuous spectrum under the action of super strong laser.We further discuss the electron radiation characteristics in the direction of the peak radiation power.We find that the pulse width of the radiation power and the polar angle of the maximum radiation direction have similar characteristics with the change of laser intensity,and both jump at some same special laser intensity.The spatial distribution of electron radiation power is symmetrical in the direction of propagation,and this symmetry is broken when the laser intensity is too large.The results of this study provide an opportunity for further research on the influence of circularly polarized laser on electron radiation characteristics.

    参考文献
    相似文献
    引证文献
引用本文

张容溢,田友伟.圆偏振激光强度对电子辐射特性的影响[J].光电子激光,2025,34(2):193~199

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-07-29
  • 最后修改日期:2022-06-17
  • 录用日期:
  • 在线发布日期: 2023-04-13
  • 出版日期:
文章二维码