High pressure neutron diffraction to beyond 20 GPa and below 1.8 K using Paris-Edinburgh load frames

S. Klotz (1) , Th. Strässle (2) , B. Lebert (1) , M. d'Astuto (1) , Th. Hansen (3)

1 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
2 PSI - Paul Scherrer Institute
3 ILL - Institut Laue-Langevin

We describe a method for collecting neutron diffraction patterns simultaneously at high pressure (>22 GPa) and low temperature (<1.8 K). The system uses ∼5–10 mm3 samples compressed by double-toroidal sintered diamond anvils, with the required forces generated by a Paris-Edinburgh press of 30 kg mass. Technical details are given and diffraction data of ε-iron at 22.6 GPa and 1.79 K are presented.

Mots clés: Neutron diffraction; high pressure; iron; Paris- Edinburgh press; low temperatures

Domaines: Physique [physics]

S. Klotz, Th. Strässle, B. Lebert, M. d'Astuto, Th. Hansen. High pressure neutron diffraction to beyond 20 GPa and below 1.8 K using Paris-Edinburgh load frames. High Pressure Research, 2016, 36 (1), pp.73-78. ⟨10.1080/08957959.2015.1136624⟩. ⟨hal-01282686⟩