Development of Novel Large-Volume Diamond Anvil Cell (LV-DAC) Project uri icon

DCO ID 11121/5068-1856-8136-6246-CC


  • Designing and constructing a new generation of large-volume apparatus is critical to accomplish DCO’s decadal goals to investigate reactions under the extreme pressure and temperature conditions of Earth’s mantle; particularly reactions involving the evolution of mantle fluid phases. The “traditional” diamond-anvil cell (DAC) has become ubiquitous for experiments at P > 10 GPa, where only a microscopic volume is required. DACs provide access to a range of pressure-temperature conditions common throughout the mantle and approaching those of Earth’s inner core, while providing optical access to an environment that is chemically inert. However, for certain critical techniques the microscopic volumes of traditional DAC designs are insufficient. To address this need for increased volume, the science team proposed to develop a novel cell with single-crystal diamond apertures and target volumes of 0.1-1.0 mm3 capable of operating at pressures of more than 50 GPa. In addition to facilitating neutron diffraction in new regimes of pressure, this device—for the first time—will permit laser-heating techniques to provide access to unprecedented high temperatures (>1000°C).

    The science team initially held off in using the DCO/Sloan support in order to complete and leverage the results of a related project funded by the Department of Energy (DOE) via the Energy Frontier Research in Extreme Environments (EFree) program. The EFree-funded adaptation of conventional DAC design proved quite successful and brought the science team much closer to achieving their goals for the DCO project. The EFree experience provided clear concepts that they are now building upon in order to make another leap forward.