X-ray diagnostics for the cavity-based x-ray free-electron laser project

Journal Article · 03 November 2024 · Physical Review Accelerators and Beams

DOI: https://doi.org/10.1103/PhysRevAccelBeams.27.110701 · OSTI ID:2476079

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

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 $\mathrm{\mu }\mathrm{m}\text{−}\mathrm{sized}$ electron bunches to fully overlap in three dimensions with the circulating $\mathrm{\mu }\mathrm{m}\text{−}\mathrm{sized}$ 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- $\mathrm{\mu }\mathrm{rad}$ angular and $\mathrm{\mu }\mathrm{m}$ spatial alignment of the CBXFEL cavity. Published by the American Physical Society 2024

• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-06CH11357; AC02-76SF00515
• OSTI ID: 2476079
• Journal Information: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 11 Vol. 27; ISSN 2469-9888; ISSN PRABCJ
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English