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Polarization control with an X-ray phase retarder for high-time-resolution pump–probe experiments at SACLA

Control of the polarization of an X-ray free-electron laser (XFEL) has been performed using an X-ray phase retarder (XPR) in combination with an arrival timing diagnostic on BL3 of the SPring-8 Angstrom Compact free-electron LAser (SACLA). To combine with the timing diagnostic, a pink beam was incid...

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Detalles Bibliográficos
Autores principales: Kubota, Y., Suzuki, M., Katayama, T., Yamamoto, K., Tono, K., Inubushi, Y., Seki, T., Takanashi, K., Wadati, H., Yabashi, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6613128/
https://www.ncbi.nlm.nih.gov/pubmed/31274437
http://dx.doi.org/10.1107/S1600577519006222
Descripción
Sumario:Control of the polarization of an X-ray free-electron laser (XFEL) has been performed using an X-ray phase retarder (XPR) in combination with an arrival timing diagnostic on BL3 of the SPring-8 Angstrom Compact free-electron LAser (SACLA). To combine with the timing diagnostic, a pink beam was incident on the XPR crystal and then monochromated in the vicinity of samples. A high degree of circular polarization of ∼97% was obtained experimentally at 11.567 keV, which agreed with calculations based on the dynamical theory of X-ray diffraction. This system enables pump–probe experiments to be operated using circular polarization with a time resolution of 40 fs to investigate ultrafast magnetic phenomena.