Note: Achieving quasi-hydrostatic conditions in large-volume toroidal anvils for neutron scattering to pressures of up to 18 GPa

Bull, C. L.; Bocian, A.; Hamidov, H.; Kamenev, K. V.; Nelmes, R. J.; Loveday, J. S.
July 2011
Review of Scientific Instruments;Jul2011, Vol. 82 Issue 7, p076101
Academic Journal
We present developments that allow neutron-scattering experiments to be performed, with both single-crystal and powder samples, under quasi-hydrostatic conditions to pressures beyond previous limits. Samples of sodium chloride and squaric acid (H2C4O4) have been loaded with argon as the pressure-transmitting medium in encapsulated gaskets redesigned for double-toroidal anvils, using a gas-loading method at ambient temperature. These samples have been compressed up to 18 GPa in a Paris-Edinburgh press, and no evidence of peak broadening in either the single-crystal or the powder experiments was observed.


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