HR: 1340h
AN: MR23C-0080    [Abstracts]
TI: Intelligent diamond anvil cell (iDAC): First in situ x-ray measurements
AU: Kubsky, S
EM: stefan.kubsky@synchrotron-soleil.fr
AF: Synchrotron Solei, L'Orme des Merisiers Saint-Aubin - BP 48 , GIF-sur-YVETTE CEDEX, 91192 France
AU: * Burchard, M
EM: michael.burchard@rub.de
AF: Ruhr-University-Bochum, Institut of Geology, Mineralogy & Geophysics Universitaetsstr. 150, Bochum, 44780 Germany
AU: Bureau, H
EM: helene.burequ@cea.fr
AF: Laboratoire Pierre Sue, CEA Saclay, Gif sur Yvette, 91191 France
AU: Somogyi, A
EM: Andrea.Somogyi@synchrotron-soleil.fr
AF: Synchrotron Solei, L'Orme des Merisiers Saint-Aubin - BP 48 , GIF-sur-YVETTE CEDEX, 91192 France
AU: Menez, B
EM: menez@ipg.jussieu.fr
AF: LGM, IPGP, 4 place Jussieu, Paris, 75252 France
AU: Malavergne, V
EM: malavergne@lpi.usra.edu
AF: LPI, 3600 Bay Area Boulevard, Houston, TX 77058 United States
AU: Munoz, M
EM: munoz@ujf-grenoble.fr
AF: LGCA, Universite J. Fourier, Saint Martin d'Heres, 38400 France
AB: The combination of diamond anvil cell (DAC) experiments in conjunction with in situ X-ray measurements has developed intensively during the last decades. However, depending on the applications, it may be very difficult to accurately measure the essential parameters like pressure, temperature, electrical conductivity, etc. at the same time. Recently, a new kind of DAC has been developed, the Burchard-Zaitsev-cell type (Burchard et al., Rev. Sci. Instr.,74, 2003). For the first time, microstructured sensors constitute an integral part of the cell: The diamond anvils pass a microimplantation, employing high-ernergy ionprojection (HEIP), for the sensor structure being created in the bulk of the diamond, at a depth of 1-2 microns. These strucures can then serve as highly accurate sensors for pressure and temperature, being chemically separated from the sample. Furthermore, it is possible to implant heaters to locally disperse heat into the cell volume. These anvils are called intelligent anvils. The aim of this study was to analyse the X-Ray absorption processes in diamond anvil cells of the Burchard-Zaitsev type, equipped with such intelligent diamonds ("iDAC" cell). Simultaneously, electronic properties of the cell have been measured, to validate the sensors for use with a highly intense and energetic X-ray beam. Experiments were performed at the ID22 beamline at the ESRF, Grenoble. We used the X-ray microprobe with a monochromatic X-ray beam of 10 to 18,1 keV, focused by means of Kirkpatrick-Baez mirrors down to a beam size of 2 x 4 æmý, delivering a flux of up to 1011 ph/second. This extremely high flux and small focus constitute state-of-the-art conditions for such experiments, regarding efficiency and feasibility of microanalysis close to realtime (~1 spectrum per s) Results have shown that for photon energies between 10 and 18,1keV, where the absorption of diamond changes dramatically, there is no influence of the beam on the electric measurements nor on the absorption measured. Therefore these intelligent anvils could be used in X-ray enviroment.
DE: 3924 High-pressure behavior
DE: 3954 X-ray, neutron, and electron spectroscopy and diffraction
DE: 8494 Instruments and techniques
SC: Mineral and Rock Physics [MR]
MN: Fall Meeting 2005