Development of high-speed X-ray imaging in multi-anvil press at the BL04B1 beamline in SPring-8 for falling sphere viscosity measurement on low viscous liquid at high pressure conditions

• Published in: Journal of Mineralogical and Petrological Sciences Vol. 119; no. 1; p. 240220
• Main Authors: KONDO, Nozomi M., KONO, Yoshio, GRÉAUX, Steeve, HIGO, Yuji
• Format: Journal Article
• Language: English
• Published: Japan Association of Mineralogical Sciences 2024
• Subjects: Liquid; Melt; Multi-anvil press; Viscosity; X-ray imaging
• ISSN: 1345-6296; 1349-3825
• DOI: 10.2465/jmps.240220

Knowledge of the viscosity of melts and liquids at high pressure conditions is essential to understand the mobility of magmas and other liquids in the Earth’s interior. The falling sphere viscosity measurement in large volume press using synchrotron X-ray imaging is one of the most powerful techniques for investigating the viscosities of melts and liquids at high pressure and high temperature conditions. Despite capability of the in-situ X-ray radiography falling sphere viscosity measurement strongly depends on the speed of X-ray imaging, common imaging setups are limited to speed of ∼ 30-60 frames/second (fps), which hamper proper viscosity measurements on low viscous melts and liquids. In this study, we developed a new high-speed X-ray imaging setup up to 5000 fps combined with 1500-ton multi-anvil press at the BL04B1 beamline in the SPring-8. By using the high-speed X-ray imaging with the frame rate of 1000 fps, we succeeded to determine low viscosity value of 0.0081 (±0.0011) Pa s in calcite (CaCO3) liquid at ∼ 4.7 GPa and ∼ 1925 °C. The high-speed X-ray imaging combined with 1500-ton multi-anvil press at the BL04B1 beamline would expand capability of falling sphere viscosity measurement of low viscous liquids at high pressure conditions of deep mantle.