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 thre...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.展开更多
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)。
文摘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.
