• Liermann, Hanns-Peter
• Jenei, Zsolt
• Ehnes, Anita
• Glazyrin, Konstantin
• Lotti, Paolo
• Gatta, G. Diego
• Bang, Yoonah
• Choi, Jinhyuk
• Schwark, Iris
• Evans, William
• Sanloup, Chrystele

Abstract

<jats:p>High-pressure and high-temperature experiments using a resistively heated diamond anvil cell have the advantage of heating samples homogeneously with precise temperature control. Here, we present the design and performance of a graphite resistive heated diamond anvil cell (GRHDAC) setup for powder and single-crystal x-ray diffraction experiments developed at the Extreme Conditions Beamline (P02.2) at PETRA III, Hamburg, Germany. In the GRHDAC, temperatures up to 2000 K can be generated at high pressures by placing it in a water-cooled vacuum chamber. Temperature estimates from thermocouple measurements are within +/−35 K at the sample position up to 800 K and within +90 K between 800 and 1400 K when using a standard seat combination of cBN and WC. Isothermal compression at high temperatures can be achieved by employing a remote membrane control system. The advantage of the GRHDAC is demonstrated through the study of geophysical processes in the Earth’s crust and upper mantle region.</jats:p>

Topics

• impedance spectroscopy
• x-ray diffraction
• experiment