Dynamic pulse-to-pulse thermal load effects in pulse-train-mode self-seeded X-ray free-electron laser

Journal Article · Tue Oct 20 00:00:00 EDT 2020 · Journal of Synchrotron Radiation (Online)

DOI:https://doi.org/10.1107/s1600577520011935· OSTI ID:1769035

Qu, Zhengxian  ^[1]; Ma, Yanbao  ^[2]; Zhou, Guanqun ^[2]; Wu, Juhao  ^[2]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Merced, CA (United States)
2. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Thermal load has been a haunting factor that undermines the brightness and coherence of the self-seeded X-ray free-electron laser. Additionally, different from uniformly pulsed mode, in pulse train mode a thermal quasi-steady state of the crystal monochromator may not be reached. This leads to a dynamic thermal distortion of the spectral transmission curves and seed quality degradation. In this paper, the pulse-to-pulse thermal load effects on the spectral transmission curves and seed quality are shown, and some instructive information for the tuning process is provided.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
• Grant/Contract Number: AC02-76SF00515; FWP-2013-SLAC-100164; 1637370
• OSTI ID: 1769035
• Journal Information: Journal of Synchrotron Radiation (Online), Vol. 27, Issue 6; ISSN 1600-5775
• Publisher: International Union of Crystallography
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
self-seeding free-electron laser
crystal monochromator
thermomechanical effects
high repetition rate
tuning process