DOE OSTI · 2476079
X-ray diagnostics for the cavity-based x-ray free-electron laser project
Abstract
The success of x-ray free-electron lasers (XFELs) in recent years has greatly advanced many scientific fields. However, most of these XFELs suffer from a low longitudinal coherence and instabilities due to the stochastic start-up process. A cavity-based x-ray free-electron laser (CBXFEL) is a possible future direction in the development of fully coherent and stable x-ray sources. One of the challenges of a CBXFEL is the requirement for the μm−sized electron bunches to fully overlap in three dimensions with the circulating μm−sized x-ray pulses in an x-ray cavity tens or hundreds of meters long. We present here the development of an x-ray diagnostics system for accurate alignment of x-ray beams in the CBXFEL cavity. The system was developed within the framework of a CBXFEL research and development collaboration among Argonne National Laboratory, SLAC National Accelerator Laboratory, and Spring-8. All the designed diagnostic components have been fully characterized at the Advanced Photon Source to demonstrate a capability for sub-μrad angular and μm spatial alignment of the CBXFEL cavity.
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Liu, Peifan, Pradhan, Paresh, Miceli, Antonino, Walko, Donald A., Shu, Deming, Sullivan, Joseph, Lang, Keenan, Rivers, Mark, Balcazar, Mario, Li, Kenan, Margraf, Rachel, Halavanau, Aliaksei, Sakdinawat, Anne, Sato, Takahiro, Zhu, Diling, Shvyd’ko, Yuri. 2024-11-04. X-ray diagnostics for the cavity-based x-ray free-electron laser project. https://doi.org/10.1103/physrevaccelbeams.27.110701
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