In:
Journal of Synchrotron Radiation, International Union of Crystallography (IUCr), Vol. 24, No. 1 ( 2017-01-01), p. 95-102
Abstract:
A prototype split-and-delay unit (SDU) for X-ray free-electron laser (XFEL) pulses is proposed based on the Graeff–Bonse four-Bragg-reflection interferometer by installing 12.5° slopes. The SDU can continuously provide a delay time from approximately −20 to 40 ps with a resolution of less than 26 fs. Because the SDU was constructed from a monolithic silicon crystal, alignment is straightforward. The obtained thoroughputs of the SDU reached 0.7% at 7.46 keV and 0.02% at 14.92 keV. The tunability of the delay time using the proposed SDU was demonstrated by finding the interference effects of the split X-rays, and the time resolution of the proposed SDU was evaluated using the width of the interference pattern recorded on the X-ray charge-coupled device camera by changing the energy, i.e. longitudinal coherence length, of the incident X-rays. It is expected that the proposed SDU will be applicable to XFEL experiments using delay times from tens of femtoseconds to tens of picoseconds, e.g. intensity correlation measurements.
Type of Medium:
Online Resource
ISSN:
1600-5775
DOI:
10.1107/S1600577516017744
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2017
detail.hit.zdb_id:
2021413-3
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