title: Development and implementation of a portable grating interferometer system as a standard tool for testing optics at the Advanced Photon Source beamline 1-BM.
abstract: We developed a portable X-ray grating interferometer setup as a standard tool for testing optics at the Advanced Photon Source (APS) beamline 1-BM. The interferometer can be operated in phase-stepping, Moiré, or single-grating harmonic imaging mode with 1-D or 2-D gratings. All of the interferometer motions are motorized; hence, it is much easier and quicker to switch between the different modes of operation. A novel aspect of this new instrument is its designed portability. While the setup is designed to be primarily used as a standard tool for testing optics at 1-BM, it could be potentially deployed at other APS beamlines for beam coherence and wavefront characterization or imaging. The design of the interferometer system is described in detail and coherence measurements obtained at the APS 34-ID-E beamline are presented. The coherence was probed in two directions using a 2-D checkerboard, a linear, and a circular grating at X-ray energies of 8 keV, 11 keV, and 18 keV.
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Lahsen
authors.initials: L
authors.lastname: Assoufid
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Xianbo
authors.initials: X
authors.lastname: Shi
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Shashidhara
authors.initials: S
authors.lastname: Marathe
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Erika
authors.initials: E
authors.lastname: Benda
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Wojcik
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Keenan
authors.initials: K
authors.lastname: Lang
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Ruqing
authors.initials: R
authors.lastname: Xu
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Liu
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Albert T
authors.initials: AT
authors.lastname: Macrander
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Jon Z
authors.initials: JZ
authors.lastname: Tischler