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

Huijeong Hwang1,2, Yoonah Bang3, Jinhyuk Choi3

  • 1Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.

The Review of Scientific Instruments
|August 4, 2023
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Summary
This summary is machine-generated.

A new graphite resistive heated diamond anvil cell (GRHDAC) enables homogeneous heating for high-pressure, high-temperature experiments. This advanced setup is crucial for studying geophysical processes in Earth

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Area of Science:

  • High-pressure and high-temperature experimental techniques.
  • Geophysics and materials science under extreme conditions.

Background:

  • Resistively heated diamond anvil cells offer homogeneous sample heating and precise temperature control.
  • Existing setups may have limitations in achievable temperatures and experimental precision.

Purpose of the Study:

  • To present the design and performance of a novel graphite resistive heated diamond anvil cell (GRHDAC).
  • To enable advanced X-ray diffraction studies at extreme pressures and temperatures.

Main Methods:

  • Development of a GRHDAC system at the Extreme Conditions Beamline (P02.2) at PETRA III.
  • Utilizing a water-cooled vacuum chamber for temperatures up to 2000 K.
  • Employing a remote membrane control system for isothermal compression.

Main Results:

  • The GRHDAC achieves temperatures up to 2000 K at high pressures.
  • Accurate temperature estimations with thermocouple measurements (within +/-35 K up to 800 K, +90 K between 800-1400 K).
  • Demonstrated utility for studying geophysical processes.

Conclusions:

  • The GRHDAC is a robust tool for high-pressure, high-temperature research.
  • The system enhances capabilities for in-situ X-ray diffraction studies.
  • It provides valuable insights into Earth's crust and upper mantle conditions.