Open AccessX‐ray optics for advanced ultrafast pump–probe X‐ray experiments at SACLA
Author(s) -
Katayama Tetsuo,
Hirano Takashi,
Morioka Yuki,
Sano Yasuhisa,
Osaka Taito,
Owada Shigeki,
Togashi Tadashi,
Yabashi Makina
Publication year - 2019
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577518018362
Subject(s) - x ray optics , optics , beamline , laser , monochromator , x ray , diffraction , materials science , ultrashort pulse , photon energy , synchrotron , advanced photon source , photon , beam (structure) , physics , wavelength
X‐ray optics were implemented for advanced ultrafast X‐ray experiments with different techniques at the hard X‐ray beamline BL3 of SPring‐8 Ångstrom Compact free‐electron LAser. A double channel‐cut crystal monochromator (DCCM) and compound refractive lenses (CRLs) were installed to tailor the beam conditions. These X‐ray optics can work simultaneously with an arrival‐timing monitor that compensates for timing jitter and drift. Inner‐walls of channel‐cut crystals (CCs) in the DCCM were processed by plasma chemical vaporization machining to remove crystallographic damage. Four‐bounced reflection profiles of the CCs were investigated and excellent diffraction qualities were achieved. The use of CRLs enabled two‐dimensional X‐ray focusing with a spot size of ∼1.5 µm × 1.5 µm full width at half‐maximum, while keeping reasonable throughputs for a wide photon energy range of 5−15 keV.