A new high pressure apparatus for neutron diffraction in liquids and glasses at 0.7 GPa

Abstract

We describe a safe, simple, all-hydraulic pressure system for neutron scattering from glass or liquid samples at 0.7 GPa (100,000 psi). The central feature of the design is a novel floating barrier. The barrier isolates the hydraulic working fluid from the glass or liquid sample in the neutron beam. The effectiveness of the system is demonstrated by neutron diffraction spectra of fully-deuterated methanol at 0.62 GPa.

A safe, simple, all-hydraulic pressure system is described for neutron scattering from glass or liquid samples at 0.7 GPa. The central feature of the design is a novel floating barrier. The barrier isolates the hydraulic working fluid from the glass or liquid sample in the neutron beam. The effectiveness of the system is demonstrated by neutron diffraction spectra of fully-deuterated methanol at ambient pressure and at 0.62 GPa.

Key Words:

• Neutron diffraction
• glasses
• liquids
• high pressure
• methanol