Premium
Pulse‐to‐pulse wavefront sensing at free‐electron lasers using ptychography
Author(s) -
Sala Simone,
Daurer Benedikt J.,
Odstrcil Michal,
Capotondi Flavio,
Pedersoli Emanuele,
Hantke Max F.,
Manfredda Michele,
Loh N. Duane,
Thibault Pierre,
Maia Filipe R. N. C.
Publication year - 2020
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576720006913
Subject(s) - optics , wavefront , pulse (music) , ptychography , laser , ultrashort pulse , free electron model , physics , materials science , diffraction , detector
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.