DIFFRACTION AND DIFFUSE-SCATTERING MEASUREMENTS IN MATERIAL SCIENCE - IMPROVEMENT BROUGHT TO A 6-CIRCLE GONIOMETER ON A SYNCHROTRON BEAM LINE

The six-circle diffractometer D23 set up in LURE-DCI (bending magnet) at Orsay has been improved since its first presentation in 1987 [M. Bessiere, G. Bessenay, J. Frouin, M. Jouvin, and S. Lefebvre, Nucl. Instrum. Methods A 261, 591 (1987)]. We present a new design for the sagittal focusing monochromator, a two-mirror device for harmonics rejection and detectors for adjustments. All these modifications are now operational and can be used together with a crystal analyzer for powder studies.