Tailoring the energy resolution of MIRACLES, the time-of-flight – backscattering spectrometer at the ESS: An updated proposal for the chopper cascade

Research output: Contribution to journalConference articlepeer-review

  • Paula Luna
  • Nunes Bordallo, Heloisa
  • Nikolaos Tsapatsaris
  • Ken H. Andersen
  • Iñigo Herranz
  • Fernando Sordo
  • Félix J. Villacorta

A cost-effective chopper layout for the chopper cascade of MIRACLES, the time-of-flight backscattering spectrometer of the European Spallation Source is described. The main driving force is the capability to display a versatile and flexible selection of configuration modes, taking advantage of the long ESS pulse and tailoring the instrument resolution ad hoc, and covering a broad range of observation times from 10 ps to the ns. A key element for the design here presented is the feasibility to reach an energy resolution contribution from the incident neutron beam of ∼1.2 μeV, while keeping the same performance of MIRACLES conceptual design. The present optimized concept results in a well-balanced combination with the contribution from the secondary spectrometer time-of-flight energy resolution, yielding a total energy resolution of 2 μeV at best, and 2.5 μeV when the primary and secondary spectrometer contributions are matched.

Original languageEnglish
JournalPhysica B: Condensed Matter
Volume564
Pages (from-to)64-68
Number of pages5
ISSN0921-4526
DOIs
Publication statusPublished - 3 Apr 2019

ID: 217477930