HR: 0800h
AN: MR11A-0889 [Abstracts]
TI: Laser Heated Diamond Anvil Cell at the Advanced Light Source
AU: * Caldwell, W A
EM: WACaldwell@lbl.gov
AF: Lawrence Berkeley National Laboratory, LBL
MS 4R0230
1 Cyclotron Rd, Berkeley, CA 94720
United States
AU: Yu, T
EM: TYu@lbl.gov
AF: Lawrence Berkeley National Laboratory, LBL
MS 4R0230
1 Cyclotron Rd, Berkeley, CA 94720
United States
AU: Celestre, R S
EM: RSCelestre@lbl.gov
AF: Lawrence Berkeley National Laboratory, LBL
MS 4R0230
1 Cyclotron Rd, Berkeley, CA 94720
United States
AU: Walter, M J
EM: M.J.Walter@bristol.ac.uk
AF: Univ. of Bristol
Dept of Earth Sciences, Wills Memorial Building
Queen's Road
Clifton, Bristol, 5S8 1RJ
United Kingdom
AU: Clark, S M
EM: SMClark@lbl.gov
AF: Lawrence Berkeley National Laboratory, LBL
MS 4R0230
1 Cyclotron Rd, Berkeley, CA 94720
United States
AB:
We have designed and installed a laser heating system for the diamond anvil cell at endstation 2 of beamline 12.2.2 of the
Advanced Light Source in Berkeley, CA. The system incorporates an 80 watt Nd:YLF (cw) laser operated in TEM01 mode. The
laser beam is split into 2 paths that are directed through the opposing diamond anvils and heat the sample from both sides.
Graphite mirrors steer the laser beams coaxial with the x-ray beam from the superbend magnet (energy range 12-30 KeV) with
very little x-ray absorption, and direct the emitted light from the heated sample into two separate spectrometers for
temperature measurement by spectroradiometry. A feedback system using a photoreciever and variable waveplate attenuator with
a response time of about 10 ms is used to control the amount of laser light entering the sample chamber in order to
precisely control heating. Technical details of the experimental setup will be presented along with initial results.
DE: 8147 Planetary interiors (5430, 5724)
DE: 3900 MINERAL PHYSICS
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: 2004 AGU Fall Meeting