飞秒激光Betatron辐射源的现状与发展趋势分析  

Current situation and development trend analysis of femtosecond laser Betatron radiation source

作　　者：黄瑞贤 奚传易 韩立琦 余金清 余同普[2] 颜学庆[3,4] Huang Ruixian;Xi Chuanyi;Han Liqi;Yu Jinqing;Yu Tongpu;Yan Xueqing(Key Laboratory of High Energy Physics and Applications of Hunan Province,School of Physics and Electronics,Hunan University,Changsha 410082,China;College of Science,National University of Defense Technology,Changsha 410073,China;State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China;Beijing Laser Acceleration Innovation Center,Beijing 101407,China)

机构地区：[1]湖南大学物理与微电子科学学院高能量物理及应用湖南省重点实验室,长沙410082 [2]国防科技大学理学院,长沙410073 [3]北京大学核物理与核技术国家重点实验室,北京100871 [4]北京怀柔激光加速创新中心,北京101407

出　　处：《强激光与粒子束》2023年第1期97-104,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11921006,11535001,12175058)。

摘　　要：在过去的几十年里,超短超强激光在等离子体中激发尾场加速电子束取得了长足的发展,基于该方式获得的高能电子束可以应用于辐射源的产生,其产生的高亮度强辐射源受到了广泛的关注。介绍了超短超强激光脉冲与低密度等离子体相互作用产生Betatron辐射的基本原理和研究现状;结合X-ray应用需求分析了Betatron辐射的发展趋势,发现迫切需要发展基于紧凑型激光装置的尾场电子加速新方案,以突破Beamloading效应对电量的限制,产生大电量电子束,进而获得高流强的Betatron辐射源;介绍了北京大学颜学庆教授领导的联合团队利用数百TW飞秒激光产生10 nC级大电量高能电子束和单发光子数目为1.0×10^(12)的Betatron辐射源的新方案。In the past decades, great progress has been made in laser wakefield acceleration of electron beam inspired by ultra-short intense lasers in plasma. The high-energy electron beam obtained by this method can be applied to the generation of the high-brightness and intense radiation sources, which have attracted extensive attention. In this paper, the basic principle and research status of Betatron radiation generated by laser wakefield acceleration are briefly introduced. The development trend of Betatron radiation is analyzed in combination with the X-ray application requirements. It is found that there is an urgent need to develop a new scheme of laser wakefield electron acceleration based on compact laser device to break through the limit of beam-loading effect on electron charge. By this means, one can generate large charge electron beam and high flux Betatron radiation source. Finally, a new scheme is briefly introduced to generate 10 nC high-energy electron beam and the photon number of Betatron radiation source reach1.0×10^(12)/shot using hundreds of TW femtosecond laser by a joint team led by Professor Yan Xueqing at Peking Univesity.

关 键 词：激光辐射源 等离子体 飞秒激光 Betatron辐射 

分 类 号：O434.12[机械工程—光学工程]