A comparison of four direct geometry time-of-flight spectrometers at the Spallation Neutron Source

Journal Article · Tue Apr 01 00:00:00 EDT 2014 · Reviews of Scientific Instruments

DOI:https://doi.org/10.1063/1.4870050· OSTI ID:1128982

Stone, Matthew B ^[1]; Niedziela, Jennifer L ^[1]; Abernathy, Douglas L ^[1]; Debeer-Schmitt, Lisa M ^[1]; Garlea, Vasile O ^[1]; Granroth, Garrett E ^[1]; Graves-Brook, Melissa K ^[1]; Ehlers, Georg ^[1]; Kolesnikov, Alexander I ^[1]; Podlesnyak, Andrey A ^[1]; Winn, Barry L ^[1]

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1. ORNL

The Spallation Neutron Source at Oak Ridge National Laboratory now hosts four direct geometry time-of-flight chopper spectrometers. These instruments cover a range of wave vector and energy transfer space with varying degrees of neutron flux and resolution. The regions of reciprocal and energy space available to measure at these instruments is not exclusive and overlaps significantly. We present a direct comparison of the capabilities of this instrumentation, conducted by data mining the instrument usage histories, and specific scanning regimes. In addition, one of the common science missions for these instruments is the study of magnetic excitations in condensed matter systems. We have measured the powder averaged spin wave spectra in one particular sample using each of these instruments, and use these data in our comparisons.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1128982
• Journal Information: Reviews of Scientific Instruments, Vol. 85, Issue 4; ISSN 0034--6748
• Country of Publication: United States
• Language: English