The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

Chemical and Materials Science (XSD-CMS)

The CMS group has operational responsibility for three experiment stations at sector 12 including: two undulator stations (12-ID-B, -C), a spectroscopy and scattering bending magnet beamline (12-BM), and with USAXS at 9-ID-C. As part of the APS Strategic Plan, canted undulators have been installed on 12-ID and 12-ID-B has become a full-time dedicated SAXS beamline and 12-ID-C has capabilities for SAXS, WAXS, ASAXS, GISAXS, AGISAXS, and TRSAXS, ex-situ and in-situ. Time-resolved and anomalous SAXS experiments on photosystems, biopolymers, polymers, ceramics, and catalytic systems are some of the focus areas for 12-ID-B and 12ID-C. 12-BM studies include: spectroscopy of actinides, nanoparticles, nanotubes, in situ electrochemistry, and proteins; scattering studies of growth strains in oxides; and fluorescence. The USAXS instrument is used in materials science research in energy related areas such as: fuel cells, thermal barrier coatings, energy storage materials, hydrogen/gas storage materials, and carbon sequestration materials.  



12-BM is a multi-purpose beamline for spectroscopy (XAS), small angle scattering (SAXS) - wide angle scattering (WAXS). The beamline is designed to provide a versatile platform to cover a wide range of experimental needs; XAS, SAXS/WAXS or even a combination of techniques on the samples under different experimental conditions (heating, cooling, in situ catalytic reaction conditions).


12-ID-B is dedicated to simultaneous SAXS/WAXS measurements with a pair of Pilatus area detectors and grazing incidence SAXS. Typical research areas supported include - solution scattering, structural biology, synthetic polymers, and colloidal particles. Chemical and material sciences studies on nano-structures are of interest. Pilatus detectors (2M and 300K) enable time resolved scattering in 10s of milliseconds.


12-ID-C is used for SAXS studies with both mono and pink beam. The 12-ID-C beamline has capabilities for SAXS, WAXS, ASAXS, GISAXS, AGISAXS, and TRSAXS. Energy range from 4.5 to 36 keV. In situ experiments are facilitated with ancillary equipment including furnaces, gas and liquid flow systems, stop-flow, high pressure, and burners.



9-ID-C is dedicated for ultra-small-angle and small-angle X-ray scattering with a worldwide unique Ultra-Small-Angle X-ray scattering instrument (USAXS) which uses Bonse-Hart geometry and 0.5 – 4 m long pinhole collimated SAXS instrument. Operating range of energies is about 8 – 18keV with flexible beam size – from 0.01 to 2 mm². The USAXS instrument provides characterization of microstructures from 1 nanometer up to 2 micron. Combined with pinhole SAXS instrument the total accessible range of sizes is 2A – 2 micron with dynamic range of intensities about 1011. The typical applications of these instruments are in the areas of materials science, polymers, metals, selected biomaterials, and ceramics.