Abstract
We have demonstrated the feasibility of a two-dimensional angle-dispersive x-ray diffraction (2D-ADXD) measurement system using a Kawai-type multianvil press at SPring-8. By taking advantage of the x-ray-transparent anvil and energy-dispersive x-ray diffraction (EDXD) techniques, high-pressure 2D-ADXD measurements of KCl were performed up to 9.9 GPa. Entire Debye-Scherrer rings were obtained, and the B1-B2 phase change of KCl was clearly observed at 2.3 GPa. The developed 2D-ADXD measurement system enabled us to obtain enough high-quality diffraction data to precisely determine and refine the structure of KCl at high-pressure.
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