Implementation of ultrafast X‐ray diffraction at the 1W2B wiggler beamline of Beijing Synchrotron Radiation Facility. (14th April 2016)

• Record Type: Journal Article
• Authors: Sun, Da-Rui; Xu, Guang-Lei; Zhang, Bing-Bing; Du, Xue-Yan; Wang, Hao; Li, Qiu-Ju; Zhou, Yang-Fan; Li, Zhen-Jie; Zhang, Yan; He, Jun; Yue, Jun-Hui; Lei, Ge; Tao, Ye
• Is Part Of: Journal of synchrotron radiation. Volume 23:Part 3(2016)
• Page Start: 830
• Page End: 835
• Publication Date: 2016-04-14
• Subjects: laser pump/X‐ray probe -- ultrafast X‐ray diffraction -- photo‐induced strain; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577516004252
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A laser pump/X‐ray probe system has been established for picosecond resolution X‐ray diffraction detection at wiggler beamline 1W2B at the BSRF parasitic lightsource. Abstract : The implementation of a laser pump/X‐ray probe scheme for performing picosecond‐resolution X‐ray diffraction at the 1W2B wiggler beamline at Beijing Synchrotron Radiation Facility is reported. With the hybrid fill pattern in top‐up mode, a pixel array X‐ray detector was optimized to gate out the signal from the singlet bunch with interval 85 ns from the bunch train. The singlet pulse intensity is ∼2.5 × 10 6 photons pulse −1 at 10 keV. The laser pulse is synchronized to this singlet bunch at a 1 kHz repetition rate. A polycapillary X‐ray lens was used for secondary focusing to obtain a 72 µm (FWHM) X‐ray spot. Transient photo‐induced strain in BiFeO3 film was observed at a ∼150 ps time resolution for demonstration.