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Figure 1
(a) Overview of the X-ray optical system for pump–probe experiments at BL3 of SACLA. TRM1 and TRM2: total reflection mirrors for transporting the XFEL beam with the full bandwidth; DCM: double-crystal monochromator to transport the XFEL beam with limited bandwidth of the order of 10−4; Grating: diffraction grating to split the incident beam into multiple branches; M1 and M3: mirrors to reflect the −1st-order branch for the arrival-timing diagnostics; CC1 and CC2: first and second channel-cut crystals of the DCCM; AT: silicon attenuators; CRLs: compound refractive lenses implemented in EH2. Dimensions of CC1 and CC2 are in mirror symmetry. (b) Schematic of CC1. The PCVM-treated areas of the inner-wall surfaces are indicated as blue rectangles. Parameters of L1, L2 and L3 are listed in Table 1[link]. (c) Schematic of the CRLs. R0, R and N are the nominal aperture, the radius of curvature at the apex and the number of lenses in the stacks, respectively. PH is a pinhole with an aperture of 1.0 mm.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 2| March 2019| Pages 333-338
https://doi.org/10.1107/S1600577518018362
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