强激光与粒子束2026，Vol.38Issue(3)：93-106,14.DOI:10.11884/HPLPB202638.250384
激光与等离子体相互作用产生Betatron辐射源的研究进展
Recent advances in Betatron radiation sources driven by laser-plasma interactions
摘要
Abstract
The rapid advancement of ultra-short and ultra-intense laser technology has established laser-plasma acceleration as a premier approach for generating GeV-level electron beams and high-quality radiation sources.Among these,Betatron radiation—emitted as electrons oscillate transversely in plasma channels—has emerged as a unique source characterized by its femtosecond pulse duration,micron-scale source size,and high peak brightness.It holds significant potential in high-energy-density physics,materials science,and ultrafast imaging.This review systematically outlines the physical principles and reviews the latest research progress of Betatron radiation generated via two core mechanisms:laser wakefield acceleration(LWFA)and direct laser acceleration(DLA).A detailed comparison reveals that while the LWFA scheme excels in producing highly collimated,high-energy photons with superior brilliance,the DLA mechanism within near-critical-density plasmas offers a different trade-off.Although DLA generates a significantly larger number of electrons and a higher photon flux,these are characterized by lower photon energies and a wider angular spread.Consequently,the divergence of the emitted X rays typically reaches hundreds of milliradians,which limits the overall brilliance.The review concludes that the future of Betatron radiation lies in enhancing repetition rates and achieving active control over radiation parameters.Developing hybrid schemes and structured targets offer potential to overcome the trade-off between high flux and high brilliance,guiding future experiments at large-scale facilities.关键词
激光尾场加速/激光直接加速/等离子体/Betatron辐射Key words
laser wake field acceleration/direct laser acceleration/plasma/betatron radiation分类
数理科学引用本文复制引用
阿卜杜伍普尔·阿布力米提,欧阳晨,高星兰,温寒,余金清..激光与等离子体相互作用产生Betatron辐射源的研究进展[J].强激光与粒子束,2026,38(3):93-106,14.基金项目
国家自然科学基金项目(12175058、11921006) （12175058、11921006）
湖南省杰出青年科学基金项目(2024JJ2009) （2024JJ2009）
