Experimental characterization of a prototype secondary spectrometer for vertically scattering multiple energy analysis at cold-neutron triple axis spectrometers

Rasmus Toft-Petersen, Felix Groitl, Mathias Kure, Joshua Lim, Petr Cermak, Svyatoslav Alimov, Thomas Wilpert, Manh Duc Le, Diana Quintero-Castro, Christof Niedermayer, Astrid Schneidewind, Klaus Habicht

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A thorough experimental characterization of a multiplexing backend with multiple energy analysis on a cold-neutron triple axis spectrometer (cTAS) is presented. The prototype employs two angular segments (2 theta-segments) each containing five vertically scattering analyzers (energy channels), which simultaneously probe an energy transfer range of 2 meV at the corresponding two scattering angles. The feasibility and strength of such a vertically scattering multiple energy analysis setup is clearly demonstrated. It is shown, that the energy resolution near the elastic line is comparable to the energy resolution of a standard cTAS. The dispersion relation of the antiferromagnetic excitations in MnF2 has been mapped out by performing constant energy transfer maps. These results show that the tested setup is virtually spurion free. In addition, focusing effects due to (mis)matching of the instrumental resolution ellipsoid to the excitation branch are clearly evident. (C) 2016 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume830
Pages (from-to)338-344
Number of pages7
ISSN0168-9002
DOIs
Publication statusPublished - 2016

Keywords

  • Inelastic neutron scattering methods
  • Multiplexing
  • Neutron spectroscopy
  • TAS
  • TAS spectroscopy

Fingerprint Dive into the research topics of 'Experimental characterization of a prototype secondary spectrometer for vertically scattering multiple energy analysis at cold-neutron triple axis spectrometers'. Together they form a unique fingerprint.

Cite this