title: A beamline for high-pressure studies at the Advanced Light Source with a superconducting bending magnet as the source.
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 T 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, followed by a Kohzu monochromator vessel with Si(111) crystals (E/DeltaE approximately equal 7000) and W/B4C multilayers (E/DeltaE approximately equal 100), and then a toroidal focusing mirror 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 detector (CCD or image-plate detector). Future developments aim at the installation of a second endstation dedicated to in situ laser heating and a dedicated high-pressure single-crystal station, applying both monochromatic and polychromatic techniques.
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. mkunz@lbl.gov
authors.forename: Martin
authors.initials: M
authors.lastname: Kunz
authors.forename: Alastair A
authors.initials: AA
authors.lastname: MacDowell
authors.forename: Wendel A
authors.initials: WA
authors.lastname: Caldwell
authors.forename: Daniella
authors.initials: D
authors.lastname: Cambie
authors.forename: Richard S
authors.initials: RS
authors.lastname: Celestre
authors.forename: Edward E
authors.initials: EE
authors.lastname: Domning
authors.forename: Robert M
authors.initials: RM
authors.lastname: Duarte
authors.forename: Arianna E
authors.initials: AE
authors.lastname: Gleason
authors.forename: James M
authors.initials: JM
authors.lastname: Glossinger
authors.forename: Nicholas
authors.initials: N
authors.lastname: Kelez
authors.forename: David W
authors.initials: DW
authors.lastname: Plate
authors.forename: Tony
authors.initials: T
authors.lastname: Yu
authors.forename: Joeseph M
authors.initials: JM
authors.lastname: Zaug
authors.forename: Howard A
authors.initials: HA
authors.lastname: Padmore
authors.forename: Raymond
authors.initials: R
authors.lastname: Jeanloz
authors.forename: A Paul
authors.initials: AP
authors.lastname: Alivisatos
authors.forename: Simon M
authors.initials: SM
authors.lastname: Clark