J. Phys. IV France 7 (1997) C2-341-C2-342
Vertically Focusing Double Mirror Device (VF-2M) for the ESRF Beamline ID12AR. Signorato1, C. Goulon-Ginet1, 2, J. Goulon1, A. Rogalev1, Ph. Marion3 and J.-J. Fermé4
1 European Synchrotron Radiation Facility (ESRF), BP. 220, 38043 Grenoble, France
2 Université Joseph Fourier, Grenoble, France
3 European Synchrotron Radiation Facility (ESRF), BP. 220, 38043 Grenoble France
4 SESO, Pôle d'Activités d'Aix-les-Milles, BP. 55000, 13792 Aix-en-Provence, France
A double mirror device (VF-2M) has been inserted in the monochromatic section of the ESRF beamline (BL) ID12A. It is aimed at refocusing the beam vertically very near the sample location and uses two identical bulk CVD SiC bendable mirrors in an antiparallel configuration. The benders are actuated by two UHV compatible digital piezo devices with nanometric precision (Queensgate Instruments Ltd.). The first commissioning tests at BL ID12A revealed an excellent agreement between ray-tracing predictions and experimental data. Vertical focus sizes as small as 22 um FWHM have been obtained. The measured reflectivity is very close to calculated values, too.
© EDP Sciences 1997