Wendy L Mao and Ho-kwang Mao 2006 J. Phys.: Condens. Matter 18 S1069 doi:10.1088/0953-8984/18/25/S13
Wendy L Mao1 and Ho-kwang Mao2
Show affiliationsA Pt sample was compressed to ultrahigh pressures in a diamond anvil cell (DAC) using a motorized gearbox to change pressure remotely from outside the synchrotron x-ray hutch. In situ angle-dispersive x-ray diffraction (XRD) was used to determine pressure from known equations of state (EOS). The sample position was unperturbed during motor-driven pressure changes. By eliminating the need to realign the sample to the x-ray position after each pressure increment, 142 XRD patterns could be collected continuously over the course of three hours, and the maximum pressure of 230 GPa was reached before diamond failure ended the experiment. We demonstrate the advantages of this motor-driven assembly for smooth and efficient pressure change, and the possibility for fine pressure and temporal resolution.
62.50.-p High-pressure effects in solids and liquids
64.30.-t Equations of state of specific substances
61.50.Ks Crystallographic aspects of phase transformations; pressure effects
Issue 25 (28 June 2006)
Received 2 February 2006, in final form 2 May 2006
Published 8 June 2006
Wendy L Mao and Ho-kwang Mao 2006 J. Phys.: Condens. Matter 18 S1069
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