OSIRIS can be used as either a high-resolution, long-wavelength diffractometer or for high-resolution quasi/ inelastic neutron scattering spectroscopy. For the purpose of description, OSIRIS may be considered as consisting of two coupled spectrometer components.
With regard to spectroscopy, it is a high-flux (owing to the super-mirror guides) time-of-flight inverted geometry instrument such that neutrons scattered by the sample are energy analysed by means of Bragg scattering from a large-area pyrolytic graphite crystal-analyser array. The analyser is associated with 42-element 3He detectors.
OSIRIS DASHBOARD (Monitor what is happening on OSIRIS)
With regard to diffraction, OSIRIS has a diffraction detector bank consisting of 962 ZnS tubes oriented at 2θ ∼ 170°. OSIRIS offers a d-range between 0.8Å and ∼ 20Å at high resolution and high counting rates.
A cooled and mechanically retractable Be filter has been installed and commissioned on the low-energy OSIRIS spectrometer at ISIS. See more details here.
OSIRIS is currently being upgraded with the addition of a silicon analyser, positioned on the vacant side inside the vacuum tank of the secondary spectrometer. For more information about this upgrade see here.
An upgrade for the primary spectrometer of OSIRIS is proposed within the Endeavour programme. This upgrade comprises a new supermirror guide with non-linear defocusing and focusing sections, a new wavelength bandwidth chopper system and a flexible slit system to adjust the divergence. See more details here.
Contact information for Osiris instrument
Location and contact information for the Osiris beamline
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