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Facility Highlight Multilayer Optics Upgrade

By Alexander Kazimirov


In 1995, CHESS users performed their first experiments with an X-ray beam produced by multilayer (ML) optics and in 1997 a double multilayer monochromator was permanently installed at the bending magnet beamline D1, primarily for the purposes of small angle scattering and fluorescence analysis. Since then, increasing X-ray flux by designing and testing new multilayer optics has been among the highest priorities of the CHESS X-ray optics group. New internally water-cooled MLs have been successfully designed for the CHESS wiggler beamlines [1,2]. Sagittal horizontally focusing MLs with a fixed radius of curvature [3,4] further significantly increased the flux density. At present, five out of twelve CHESS beamlines are based on multilayer optics: • hard bending magnet D1 beamline operates full time with ML optics; the experimental techniques include small angle scattering (SAXS), grazing incidence SAXS (GISAXS), time-resolved radiography and various capillary based microbeam fluorescence techniques; • hard bending magnet F3 beamline can be operated with both crystals and multilayers. ML optics is used to study the effect of radiation damage on macromolecular crystals. During the last few runs this beamline was used to test multilayer optics for macromolecular crystallography data collection; • wiggler A2 beamline is operated with ML optics for about half of the time. ML optics are used for time-resolved in situ growth of organic thin films, imaging experiments (e.g. fuel spray radiography wit

Year: 2013
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