EPJ Web of Conferences (Jan 2015)

Opening the terahertz window on the OSIRIS spectrometer

  • Demmel F.,
  • McPhail D.,
  • Crawford J.,
  • Maxwell D.,
  • Pokhilchuk K.,
  • Garcia-Sakai V.,
  • Mukhopadyay S.,
  • Telling M.T.F.,
  • Bermejo F.J.,
  • Skipper N.T.,
  • Fernandez-Alonso F.

DOI
https://doi.org/10.1051/epjconf/20158303003
Journal volume & issue
Vol. 83
p. 03003

Abstract

Read online

A cooled and mechanically retractable beryllium filter has been installed and commissioned on the low-energy OSIRIS spectrometer at ISIS. This instrument development extends the energy-transfer range of the spectrometer up to ca. 20 meV (∼ 5 THz), leading to an excellent resolution at THz frequencies and substantial gains in detected flux relative to existing capabilities on the neighbouring IRIS spectrometer. Herein, we provide a concise account of this new capability for high-resolution neutron spectroscopy in the THz domain, as well as outline a number of ongoing and potential scientific opportunities in condensed-matter physics, chemistry, and materials science.