A comparison of four direct geometry time-of-flight spectrometers at the Spallation Neutron Source.
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 are not exclusive and overlap 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.
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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MB
Stone
Instrument and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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JL
Niedziela
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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DL
Abernathy
Instrument and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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L
DeBeer-Schmitt
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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G
Ehlers
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Garlea
Neutron Data Analysis and Visualization Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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GE
Granroth
Instrument and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Graves-Brook
Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Kolesnikov
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Podlesnyak
Quantum Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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Winn
D009502:Neutrons; D012542:Scattering, Radiation; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods