HR: 1340h
AN: MR23C-0086    [Abstracts]
TI: Laser Heated Diamond Anvil Cell at the Advanced Light Source
AU: * Caldwell, W A
EM: WACaldwell@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: * Caldwell, W A
EM: WACaldwell@lbl.gov
AF: Dept. Earth & Planetary Sci. UC Berkeley, 307 McCone Hall, Berkeley, CA 94720-4767 United States
AU: Kunz, M
EM: MKunz@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: Celestre, R S
EM: RSCelestre@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: Glossinger, J M
EM: JMGlossinger@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: MacDowell, A A
EM: AAMacDowell@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: Walter, M J
EM: M.J.Walter@bristol.ac.uk
AF: Dept. of Earth Sciences Univ. Bristol, Will's Memorial Bldg. Queen's Rd, Bristol, BS8 1RJ United Kingdom
AU: Walker, D
EM: dwalker@ldeo.columbia.edu
AF: Dept. Earth & Envrmntl Sci, 55 Geochemistry Lamont-Doherty Earth Obs, Palisades, NY 10964 United States
AU: Padmore, H A
EM: HAPadmore@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AU: Jeanloz, R
EM: jeanloz@berkeley.edu
AF: Dept. Earth & Planetary Sci. UC Berkeley, 307 McCone Hall, Berkeley, CA 94720-4767 United States
AU: Clark, S M
EM: SMClark@lbl.gov
AF: Advanced Light Source Lawrence Berkeley National Lab, 1 Cyclotron Rd MS 4R0230, Berkeley, CA 94720 United States
AB: The laser heating system for the diamond anvil cell at endstation 2 of beamline 12.2.2 of the Advanced Light Source in Berkeley, CA has been constructed and is available for high-pressure high-temperature experiments. The endstation couples a high-brilliance synchrotron x-ray source with an industrial strength laser to heat and probe samples at high pressure in the diamond anvil cell. The system incorporates an 80 watt Nd:YLF (cw) laser operated in TEM01 mode. Double-sided heating is achieved by splitting the laser beam into 2 paths that are directed through the opposing diamond anvils. X-ray transparent mirrors steer the laser beams coaxial with the x-ray beam from the superbend magnet (energy range 6-35 KeV) and direct the emitted light from the heated sample into two separate spectrometers for temperature measurement by spectroradiometry. Objective lenses focus the laser beam to a size of 30 micron diameter (FWHM) in the sample region. An x-ray spot size of 10 micron diameter (FWHM) has been achieved with the installation of a pair of focusing Kirkpatrick-Baez mirrors. A unique aperture configuration has produced an x-ray beam profile that has very low intensity in the tails. The main thrust of the program is aimed at producing in-situ high-pressure high-temperature x-ray diffraction data, but other modes of operation, such as x-ray imaging have been accomplished. Technical details of the experimental setup will be presented along with initial results.
DE: 3900 MINERAL PHYSICS
DE: 3919 Equations of state
DE: 3924 High-pressure behavior
DE: 3954 X-ray, neutron, and electron spectroscopy and diffraction
DE: 3994 Instruments and techniques
SC: Mineral and Rock Physics [MR]
MN: Fall Meeting 2005