High-gradient modulation of microbunchings using a minimized system driven by a vortex laser  

作　　者：郝书法 吕政星 董浩 何坚志 黄楠顺 孙丰钰 史志勇 孙昊 王文鹏 冷雨欣 李儒新 徐至展 Shufa Hao;Zhengxing Lv;Hao Dong;Jianzhi He;Nanshun Huang;Fengyu Sun;Zhiyong Shi;Hao Sun;Wenpeng Wang;Yuxin Leng;Ruxin Li;Zhizhan Xu(State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China

出　　处：《Chinese Optics Letters》2023年第9期131-136,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.12075306);the Natural Science Foundation of Shanghai(No.22ZR1470900);Key Research Programs in Frontier Science(No.ZDBS-LY-SLH006)。

摘　　要：This study entailed the development of a high-gradient modulation of microbunching for traditional radiation frequency accelerators using a minimized system driven by a relativistic Laguerre–Gaussian(LG)laser in three-dimensional particlein-cell(PIC)simulations.It was observed that the LG laser could compress the transverse dimension of the beam to within a 0.7μm radius(divergence≈4.3 mrad),which is considerably lower than the case tuned by a Gaussian laser.In addition,the electron beam could be efficiently modulated to a high degree of bunching effect(>0.5)within~21 fs(~7μm)in the longitudinal direction.Such a high-gradient density modulation driven by an LG laser for pre-bunched,low-divergence,and stable electron beams provides a potential technology for the system minimization of X-ray free-electron lasers(XFELs)and ultrashort-scale(attosecond)electron diffraction research.

关 键 词：relativistic Laguerre–Gaussian laser electron bunch modulation X-ray free-electron lasers 

分 类 号：TN248[电子电信—物理电子学]