Event-based processing of neutron scattering data at the spallation neutron source

Garrett E. Granroth, Ke An, Hillary L. Smith, Pamela Whitfield, Joerg C. Neuefeind, Jooseop Lee, Wenduo Zhou, Vladislav N. Sedov, Peter F. Peterson, Andre Parizzi, Harley Skorpensk, Steven M. Hartman, Ashfia Huq, Douglas L. Abernathy

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The Spallation Neutron Source at Oak Ridge National Laboratory, USA, ushered in a new era of neutron scattering experiments through the use of eventbased data. Tagging each neutron event allows pump–probe experiments, measurements with a parameter asynchronous to the source, measurements with continuously varying parameters and novel ways of testing instrument components. This contribution will focus on a few examples. A pulsed magnet has been used to study diffraction under extreme fields. Continuous ramping of temperature is becoming standard on the POWGEN diffractometer. Battery degradation and phase transformations under heat and stress are often studied on the VULCAN diffractometer. Supercooled Al2O3 was studied on NOMAD. A study of a metallic glass through its glass transition was performed on the ARCS spectrometer, and the effect of source variation on chopper stability was studied for the SEQUOIA spectrometer. Besides a summary of these examples, an overview is provided of the hardware and software advances to enable these and many other event-based measurements.

Original languageEnglish
Pages (from-to)616-629
Number of pages14
JournalJournal of Applied Crystallography
Volume51
DOIs
StatePublished - Mar 22 2018

Funding

DE-FG02-03ER46055. Early demonstrations of the ADCROC DAQ and asynchronous measurements on VULCAN, and the development of the pulsed-magnet environment into a user capability, were supported by separate Laboratory Directed Research Development projects at Oak Ridge National Laboratory. Neutron scattering measurements are sponsored by the User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. This manuscript has been authored by UT-Battelle, LLC, under contract No. DE-AC05-00OR22725 with the US Department of Energy. HLS acknowledges support from the US Department of Energy, Office of Basic Energy Sciences, under contract No.

FundersFunder number
Office of Basic Energy Sciences
US Department of Energy
Basic Energy Sciences

    Keywords

    • Event-based data processing
    • Neutron diffraction
    • Spectroscopy
    • Stroboscopic experiments

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