Work

New single-toroidal sintered diamond anvil and assembly for high pressure neutron diffraction

Year: 2024

Type: article

Abstract: In-situ high pressure neutron diffraction experiments, which require a large volume samples, remain challenging, particularly when generating simultaneous high pressure-temperature ( P - T ) conditions. Although high pressure neutron diffraction experiments have been successfully extended to pressures exceeding 20 GPa, generating pressures over 10 GPa with a large sample volume in the millimeter scale is still difficult. Based on the strategy of introducing gaskets in multi-anvil press, a new single-toroidal sintered diamond anvil and high P - T assembly have been designed for use in the Paris-Edinburgh press, to promoting the neutron diffraction technique with a broadened P - T range. This new single-toroidal set-up can achieve pressure exceeding 14 GPa, with a pressure generating efficiency is nearly same as that of double-toroidal anvil, and exhibits remarkable stability during high P - T experiments. The high P - T neutron diffraction experiments demonstrate that the new set-up can achieves a pressure of 8.7(1) GPa and a temperature of 1380(15) K with a large sample volume of 38 mm 3 .

Source: Nuclear Analysis

DOI: 10.1016/j.nucana.2024.100142