A Beamline for High-Pressure Studies at the Advanced Light Source with a Superconducting Bending Magnet as the Source
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A Beamline for High-Pressure Studies at the Advanced Light Source with a Superconducting Bending Magnet as the Source

  • Author(s): Kunz, Martin
  • MacDowell, Alastair A.
  • Caldwell, Wendel A.
  • Cambie, Daniella
  • Celestre, Richard S.
  • Domning, Edward E.
  • Duarte, Robert M.
  • Gleason, Arianna E.
  • Glossinger, James M.
  • Kelez, Nicholas
  • Plate, David W.
  • Yu, Tony
  • Zaug, Joeseph M.
  • Padmore, Howard A.
  • Jeanloz, Raymond
  • Alivisatos, A. Paul
  • Clark, Simon M.
  • et al.
Abstract

A new facility for high-pressure diffraction and spectroscopy using diamond anvil high-pressure cells has been built at the Advanced Light Source on Beamline 12.2.2. This beamline benefits from the hard X-radiation generated by a 6 Tesla superconducting bending magnet (superbend). Useful x-ray flux is available between 5 keV and 35 keV. The radiation is transferred from the superbend to the experimental enclosure by the brightness preserving optics of the beamline. These optics are comprised of: a plane parabola collimating mirror (M1), followed by a Kohzu monochromator vessel with a Si(111) crystals (E/DE ~; 7000) and a W/B4C multilayers (E/DE ~; 100), and then a toroidal focusing mirror (M2) with variable focusing distance. The experimental enclosure contains an automated beam positioning system, a set of slits, ion chambers, the sample positioning goniometry and area detectors (CCD or image-plate detector). Future developments aim at the installation of a second end station dedicated for in situ laser-heating on one hand and a dedicated high-pressure single-crystal station, applying both monochromatic as well as polychromatic techniques.

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