DREAM-a versatile powder diffractometer at the ESS

Research output: Contribution to journalArticle

Abstract

The instrument DREAM, in construction at the long pulse European Spallation Source (ESS), is a new type of neutron time-of-flight powder diffractometer, which utilizes additional choppers to meet the typical high resolution requests. Pulses will be of symmetric shape and their width can be varied from 10 μs to 1 ms, providing an unprecedented flexibility from highest to low resolution with optimized intensities at the superior brightness of the 5 MW source. The design is driven particularly by the needs and challenges for small and complex samples, large unit cell materials, thermoelectric cage structures or metal-organic framework structures, multiphase battery materials and complex magnetic structures. Therefore, the chosen wavelength bandwidth of 3.7 Å may cover well the peak intensities of the thermal and cold moderator used simultaneously and provides a sufficient Q (and d) range for obtaining diffraction patterns in a single setting. VITESS simulations show a performance that is about two orders of magnitude higher than current best instruments.

Details

Authors
  • W. Schweika
  • N. Violini
  • K. Lieutenant
  • C. Zendler
  • D. Nekrassov
  • A. Houben
  • P. Jacobs
  • P. F. Henry
External organisations
  • Jülich Research Centre
  • RWTH Aachen University
  • Helmholtz-Zentrum Berlin for Materials and Energy
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number012013
JournalJournal of Physics: Conference Series
Volume746
Issue number1
Publication statusPublished - 2016 Oct 10
Publication categoryResearch
Peer-reviewedYes