Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus

Abstract

A rapid-quench technique for multi-anvil high-pressure-temperature experiments Review of Scientific Instruments 91, 065105 (2020);

Extreme conditions research using the large-volume press at the P61B endstation, PETRA III

“…Using 6-8 compression, higher pressure can be achieved using very hard carbide anvils with a modified shape (Ishii et al, 2016(Ishii et al, , 2017(Ishii et al, , 2019 and using sintereddiamond (SD) anvils (Yamazaki et al, 2014(Yamazaki et al, , 2019Yamazaki & Ito, 2020). Preliminary tests show the Aster-15 LVP can stably generate pressures in experimental assemblies up to at least 50 GPa (Xie et al, 2021). However, these attempts are not described here because they are too specific for the majority of beamline users.…”

“…P61B has been in user operation with synchrotron X-rays since August 2020, receiving 50% of the available beam time. A number of in situ studies are already in the press or published, such as: (1) the explanation for the observation of a depressed 660 km discontinuity caused by the akimotoitebridgmanite transition (Chanyshev et al, 2022); (2) the determination of phase relations of the Olivine-Ahrensite transition in the Mg 2 SiO 4 -Fe 2 SiO 4 System at 1740 K and 7.5-11.2 GPa using modern multi-anvil techniques (Chanyshev et al, 2021); (3) the simultaneous generation of ultra-high pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus (Xie et al, 2021); (4) an electrically conductive and ferromagnetic nano-structure manganese mono-boride with high Vickers hardness (Ma et al, 2021). These studies demonstrate that the beamline is ready to produce publishable data from beam time for an increasing variety of LVP science cases using in situ X-ray techniques.…”