Pulse-to-pulse wavefront sensing at free-electron lasers using ptychography.

ABSTRACT: The pressing need for knowledge of the detailed wavefront properties of ultra-bright and ultra-short pulses produced by free-electron lasers has spurred the development of several complementary characterization approaches. Here a method based on ptychography is presented that can retrieve high-resolution complex-valued wavefunctions of individual pulses without strong constraints on the illumination or sample object used. The technique is demonstrated within experimental conditions suited for diffraction experiments and exploiting Kirkpatrick-Baez focusing optics. This lensless technique, applicable to many other short-pulse instruments, can achieve diffraction-limited resolution.

SUBMITTER: Sala S 

PROVIDER: S-EPMC7401787 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature