Next-generation diamond cell and applications to single-crystal neutron diffraction
| Autor: | Mark Loguillo, D. Armitage, Reinhard Boehler, Masaaki Matsuda, Katie M. Andrews, Antonio M. dos Santos, Gerald M. Rucker, Dean A. A. Myles, Yan Wu, Malcolm J. Cochran, Bianca Haberl, Sachith Dissanayake, Christina Hoffmann, Huibo Cao, Jamie J. Molaison, Feng Ye, Flora Meilleur |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Nuclear engineering Neutron diffraction chemistry.chemical_element Diamond Temperature cycling engineering.material Oak Ridge National Laboratory 01 natural sciences chemistry 0103 physical sciences engineering Neutron source Beryllium 010306 general physics Instrumentation High Flux Isotope Reactor Spallation Neutron Source |
| Zdroj: | Review of Scientific Instruments. 89:092902 |
| ISSN: | 1089-7623 0034-6748 |
| Popis: | A diamond cell optimized for single-crystal neutron diffraction is described. It is adapted for work at several of the single-crystal diffractometers of the Spallation Neutron Source and the High Flux Isotope Reactor at the Oak Ridge National Laboratory (ORNL). A simple spring design improves portability across the facilities and affords load maintenance from offline pressurization and during temperature cycling. Compared to earlier prototypes, pressure stability of polycrystalline diamond (Versimax®) has been increased through double-conical designs and ease of use has been improved through changes to seat and piston setups. These anvils allow ∼30%-40% taller samples than possible with comparable single-crystal anvils. Hydrostaticity and the important absence of shear pressure gradients have been established with the use of glycerin as a pressure medium. Large single-crystal synthetic diamonds have also been used for the first time with such a clamp-diamond anvil cell for pressures close to 20 GPa. The cell is made from a copper beryllium alloy and sized to fit into ORNL's magnets for future ultra-low temperature and high-field studies. We show examples from the Spallation Neutron Source's SNAP and CORELLI beamlines and the High Flux Isotope Reactor's HB-3A and IMAGINE beamlines. |
| Databáze: | OpenAIRE |
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