title: New beamline optics for the effective use of a wiggler beam.
abstract: A hard X-ray beamline, BL13A, has been constructed for precision diffraction experiments conducted downstream of the multipole wiggler MPW#13 at the Photon Factory. The BL13A line can be used along with the main beamline, BL13B, which accepts the central 4 mrad of the 5 mrad horizontal fan. BL13A uses the remaining horizontal off-axis beam. The beam is diffracted by a double-crystal monochromator which uses asymmetric (422) diffraction with a horizontal diffraction vector. A monochromatic beam with 33.5 keV photon energy is directed to a precision goniometer. Good beam stability and high intensity were obtained.
authors.affiliation: National Research Laboratory of Metrology, Umezono, Tsukuba, Ibaraki 305, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakayama
authors.forename: Y
authors.initials: Y
authors.lastname: Okada
authors.forename: H
authors.initials: H
authors.lastname: Fujimoto