1.
J Synchrotron Radiat
; 23(Pt 3): 830-5, 2016 05.
Artigo
em Inglês
| MEDLINE
| ID: mdl-27140165
RESUMO
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 85â ns from the bunch train. The singlet pulse intensity is â¼2.5 × 10(6)â photonsâ pulse(-1) at 10â keV. The laser pulse is synchronized to this singlet bunch at a 1â kHz repetition rate. A polycapillary X-ray lens was used for secondary focusing to obtain a 72â µm (FWHM) X-ray spot. Transient photo-induced strain in BiFeO3 film was observed at a â¼150â ps time resolution for demonstration.