1. NSLS II

    "X-RAY DEVELOPMENT AT IMAGINE OPTIC - WAVEFRONT ANALYSIS, ADAPTIVE OPTICS AND HIGH ACCURACY OFFLINE METROLOGY"

    Presented by Guillaume Dovillaire, Imagine Optic, France

    Tuesday, April 9, 2013, 11 am
    Seminar Room, Bldg. 725

    Hosted by: Mourad Idir

    Since 1996, Imagine Optic develops and manufactures Shack-Hartmann wavefront sensors for visible light. Thanks to partnerships with academics partners (LOA Philippe Zeitoun, Julien Gauthier for the soft x-ray and SOLEIL Mourad Idir and Pascal Mercère for soft and hard x-ray), two new sensors have been developed for soft and hard X rays. During this talk, I will present these two technologies and the scientific results obtained. Source characterization, optics alignments and wavefront correction using deformable mirrors are presented showing that wavefront sensing "at the wavelength" can be used in many research fields. The design of the new generation of beamlines relies on very high quality mirrors. Using its knowledge in Shack-Hartmann sensors, Imagine Optic and BNL (Mourad Idir) developed recently a completely new approach for measuring mirror shapes and slopes defects. By coupling a high accuracy wavefront sensor and a powerful stitching algorithm, we managed to obtain sensitivity better than 30nrad rms. We present the system, the main steps of the stitching algorithm and the very recent results we obtained on a flat and spherical mirror. Keywords: wavefront sensing, Hartmann and Shack Hartmann technique, deformable mirror, adaptive optics, stitching algorithm.