MULTIPLE-WAVELENGTH POWDER DIFFRACTION USING IMAGING PLATES AT THE AUSTRALIAN NATIONAL BEAMLINE

The Australian powder diffractometer at the Photon Factory is capable of recording multiple powder-diffraction scans in less than 5 min per pattern using imaging plates in Debye-Scherrer geometry. This, coupled with incrementing the X-ray beam energy in suitably small steps (down to similar to 2eV) between exposures, allows fast collection of anoma lous diffraction data. Data collected from a copper oxide-based superc onductor at energies near the Cu K-absorption edge are presented, alon g with an account of the technique used to extract multiple-exposure p owder-diffraction data from imaging plates.