Dynamic pulse‐to‐pulse thermal load effects in pulse‐train‐mode self‐seeded X‐ray free‐electron laser. (20th October 2020)

• Record Type: Journal Article
• Authors: Qu, Zhengxian; Ma, Yanbao; Zhou, Guanqun; Wu, Juhao
• Is Part Of: Journal of synchrotron radiation. Volume 27:Part 6(2020)
• Page Start: 1725
• Page End: 1729
• Publication Date: 2020-10-20
• Subjects: self‐seeding free‐electron laser -- crystal monochromator -- thermomechanical effects -- high repetition rate -- tuning process; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577520011935
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : Thermal load in pulse train mode can be a haunting factor that undermines the brightness and coherence of self‐seeded X‐ray free‐electron lasers. The pulse‐to‐pulse thermal load effects on the seed quality and some instructive information for the tuning process are studied and presented. Abstract : Thermal load has been a haunting factor that undermines the brightness and coherence of the self‐seeded X‐ray free‐electron laser. 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.