BENT CRYSTAL, BENT MULTILAYER OPTICS ON A MULTIPOLE WIGGLER LINE FOR AN X-RAY DIFFRACTOMETER WITH AN IMAGING PLATE DETECTOR

A setup for diffraction and diffuse scattering studies on biological crystals, in the wavelength range 1.5-0.9 angstrom, is operating on the superconducting wiggler line of the storage ring DCI at LURE. Double focusing and rejection of harmonic contribution are achieved by combining two Bragg reflectors with elliptical curvature, respectively, a Si or Ge single crystal and a large W/Si interferential reflector (layered synthetic microstructure). Area detectors include photographic films and an imaging plate scanner device.