Graphite resistive heated diamond anvil cell for simultaneous high-pressure and high-temperature diffraction experiments

• Published in: Review of scientific instruments 2023-08, Vol.94 (8)
• Main Authors: Hwang, Huijeong, Bang, Yoonah, Choi, Jinhyuk, Cynn, Hyunchae, Jenei, Zsolt, Evans, William J., Ehnes, Anita, Schwark, Iris, Glazyrin, Konstantin, Gatta, G. Diego, Lotti, Paolo, Sanloup, Chrystèle, Lee, Yongjae, Liermann, Hanns-Peter
• Format: Article
• Language: English
• Subjects: Anvils; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Diamond anvil cells; Earth crust; Earth Sciences; Graphite; High pressure; high pressure instruments; High temperature effects; phase transitions; Position measurement; Remote control; Sciences of the Universe; Scientific apparatus & instruments; Single crystals; Temperature; Temperature control; thermal conductivity; Thermocouples; Vacuum chambers; x-ray diffraction
• ISSN: 0034-6748; 1089-7623
• DOI: 10.1063/5.0132981

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.