title: All-diamond optical assemblies for a beam-multiplexing X-ray monochromator at the Linac Coherent Light Source.
abstract: A double-crystal diamond (111) monochromator recently implemented at the Linac Coherent Light Source (LCLS) enables splitting of the primary X-ray beam into a pink (transmitted) and a monochromatic (reflected) branch. The first monochromator crystal, with a thickness of ∼100 µm, provides sufficient X-ray transmittance to enable simultaneous operation of two beamlines. This article reports the design, fabrication and X-ray characterization of the first and second (300 µm-thick) crystals utilized in the monochromator and the optical assemblies holding these crystals. Each crystal plate has a region of about 5 × 2 mm with low defect concentration, sufficient for use in X-ray optics at the LCLS. The optical assemblies holding the crystals were designed to provide mounting on a rigid substrate and to minimize mounting-induced crystal strain. The induced strain was evaluated using double-crystal X-ray topography and was found to be small over the 5 × 2 mm working regions of the crystals.
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, USA.
authors.forename: S
authors.initials: S
authors.lastname: Stoupin
authors.affiliation: Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Russian Federation.
authors.forename: S A
authors.initials: SA
authors.lastname: Terentyev
authors.affiliation: Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Russian Federation.
authors.forename: V D
authors.initials: VD
authors.lastname: Blank
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, USA.
authors.forename: Yu V
authors.initials: YV
authors.lastname: Shvyd'ko
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, USA.
authors.forename: K
authors.initials: K
authors.lastname: Goetze
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, USA.
authors.forename: L
authors.initials: L
authors.lastname: Assoufid
authors.affiliation: Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Russian Federation ; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russian Federation.
authors.forename: S N
authors.initials: SN
authors.lastname: Polyakov
authors.affiliation: Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Russian Federation.
authors.forename: M S
authors.initials: MS
authors.lastname: Kuznetsov
authors.affiliation: Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Russian Federation.
authors.forename: N V
authors.initials: NV
authors.lastname: Kornilov
authors.affiliation: Illinois Institute of Technology, Chicago, Illinois, USA.
authors.forename: J
authors.initials: J
authors.lastname: Katsoudas
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: R
authors.initials: R
authors.lastname: Alonso-Mori
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: M
authors.initials: M
authors.lastname: Chollet
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Glownia
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: H
authors.initials: H
authors.lastname: Lemke
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: A
authors.initials: A
authors.lastname: Robert
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: M
authors.initials: M
authors.lastname: Sikorski
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: S
authors.initials: S
authors.lastname: Song
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA.
authors.forename: D
authors.initials: D
authors.lastname: Zhu
keywords: X-ray monochromators; beam multiplexing; diamond