A new spot characterization method is proposed, based on coherent diffraction imaging that can accurately determine the focal spot size of a single X-ray free-electron laser pulse. This method was… Click to show full abstract
A new spot characterization method is proposed, based on coherent diffraction imaging that can accurately determine the focal spot size of a single X-ray free-electron laser pulse. This method was successfully applied to characterize the focal spot size at the Coherent Scattering and Imaging endstation of the Shanghai Soft X-ray Free Electron Laser Facility.
               
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