Silver Jubilee for the OSIRIS spectrometer: Achievements and Outlook

Abstract

In December 1997 the Osiris beamline at the ISIS facility, UK, recorded its first neutron spectrum. The instrument enjoyed a first stint as a cold neutron diffractometer before the spectroscopic capabilities were fully commissioned. Osiris soon became a workhorse quasielastic spectrometer as well as a highly successful low-energy spectrometer. The status of the instrument is recognized by the user community with high-impact publications ranging from energy materials over life science to quantum matter. To enhance the existing capabilities a silicon analyzer is under construction. The primary spectrometer will be upgraded with a new supermirror guide providing a factor 10 to 14 increased flux in combination with a new hydrogen moderator. Beyond these developments further improvements of the energy resolution with a combination of a fast pulse shaping chopper and using a direct backscattering geometry are being investigated.

Cation Dynamics as Structure Explorer in Hybrid Perovskites─The Case of MAPbI3

“…In situ neutron powder diffraction (NPD) measurements were performed on the OSIRIS backscattering instrument at the ISIS Neutron & Muon Spallation Source (STFC, Didcot, UK), − using the same hydrogenous sample of MAPbI 3 (purity >99%; Xi’an Polymer Light Technologies) that had been extensively characterized in our previous works. , Raw time-of-flight data were reduced to d -spacing using the Mantid software package, roughly covering the range 3–6.5 Å. The whole pattern fitting of the NPD data was performed using the GSAS-ii software .…”