A concept of a broadband inverted geometry spectrometer for the Second Target Station at the Spallation Neutron Source

E. Mamontov; C. Boone; M. J. Frost; K. W. Herwig; T. Huegle; J. Y.Y. Lin; B. McCormick; W. McHargue; A. D. Stoica; P. Torres; W. Turner

doi:10.1063/5.0086451

A concept of a broadband inverted geometry spectrometer for the Second Target Station at the Spallation Neutron Source

E. Mamontov, C. Boone, M. J. Frost, K. W. Herwig, T. Huegle, J. Y.Y. Lin, B. McCormick, W. McHargue, A. D. Stoica, P. Torres, W. Turner

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

BWAVES is an acronym for Broadband Wide-Angle VElocity Selector spectrometer, indicating that a novel WAVES (Wide-Angle VElocity Selector) device will be used to select the velocity/wavelength of the detected neutrons after they are scattered by the sample. We describe a conceptual design of BWAVES, a time-of-flight broadband inverted-geometry neutron spectrometer for the Second Target Station at the Spallation Neutron Source operated by Oak Ridge National Laboratory. Being the first inverted geometry spectrometer where the energy of the detected neutrons can be chosen by a WAVES device mechanically, irrespective of the limitations imposed by the crystal analyzers or filters, BWAVES will feature a uniquely broad, continuous dynamic range of measurable energy transfers, spanning 4.5 decades. This will enable measurements of both vibrational and relaxational excitations within the same, continuous scattering spectra. Novel approaches that are necessary for the implementation of a WAVES device at the BWAVES spectrometer will result in a spectrometer with the design and characteristics much different from those displayed by the neutron spectrometers in existence today.

Original language	English
Article number	045101
Journal	Review of Scientific Instruments
Volume	93
Issue number	4
DOIs	https://doi.org/10.1063/5.0086451
State	Published - Apr 1 2022

Funding

The design of BWAVES has been the result of efforts by many contributors. This research used resources of the Spallation Neutron Source Second Target Station Project at Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle LLC for DOE’s Office of Science, the single largest supporter of basic research in the physical sciences in the United States. The operation and user program at the Spallation Neutron Source is supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. This article has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy (DOE). The U.S. government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for U.S. government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Funders	Funder number
Scientific User Facilities Division
U.S. Department of Energy	DE-AC05-00OR22725
Basic Energy Sciences

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10.1063/5.0086451

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title = "A concept of a broadband inverted geometry spectrometer for the Second Target Station at the Spallation Neutron Source",

abstract = "BWAVES is an acronym for Broadband Wide-Angle VElocity Selector spectrometer, indicating that a novel WAVES (Wide-Angle VElocity Selector) device will be used to select the velocity/wavelength of the detected neutrons after they are scattered by the sample. We describe a conceptual design of BWAVES, a time-of-flight broadband inverted-geometry neutron spectrometer for the Second Target Station at the Spallation Neutron Source operated by Oak Ridge National Laboratory. Being the first inverted geometry spectrometer where the energy of the detected neutrons can be chosen by a WAVES device mechanically, irrespective of the limitations imposed by the crystal analyzers or filters, BWAVES will feature a uniquely broad, continuous dynamic range of measurable energy transfers, spanning 4.5 decades. This will enable measurements of both vibrational and relaxational excitations within the same, continuous scattering spectra. Novel approaches that are necessary for the implementation of a WAVES device at the BWAVES spectrometer will result in a spectrometer with the design and characteristics much different from those displayed by the neutron spectrometers in existence today.",

author = "E. Mamontov and C. Boone and Frost, {M. J.} and Herwig, {K. W.} and T. Huegle and Lin, {J. Y.Y.} and B. McCormick and W. McHargue and Stoica, {A. D.} and P. Torres and W. Turner",

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AU - Mamontov, E.

AU - Boone, C.

AU - Frost, M. J.

AU - Herwig, K. W.

AU - Huegle, T.

AU - Lin, J. Y.Y.

AU - McCormick, B.

AU - McHargue, W.

AU - Stoica, A. D.

AU - Torres, P.

AU - Turner, W.

PY - 2022/4/1

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N2 - BWAVES is an acronym for Broadband Wide-Angle VElocity Selector spectrometer, indicating that a novel WAVES (Wide-Angle VElocity Selector) device will be used to select the velocity/wavelength of the detected neutrons after they are scattered by the sample. We describe a conceptual design of BWAVES, a time-of-flight broadband inverted-geometry neutron spectrometer for the Second Target Station at the Spallation Neutron Source operated by Oak Ridge National Laboratory. Being the first inverted geometry spectrometer where the energy of the detected neutrons can be chosen by a WAVES device mechanically, irrespective of the limitations imposed by the crystal analyzers or filters, BWAVES will feature a uniquely broad, continuous dynamic range of measurable energy transfers, spanning 4.5 decades. This will enable measurements of both vibrational and relaxational excitations within the same, continuous scattering spectra. Novel approaches that are necessary for the implementation of a WAVES device at the BWAVES spectrometer will result in a spectrometer with the design and characteristics much different from those displayed by the neutron spectrometers in existence today.

AB - BWAVES is an acronym for Broadband Wide-Angle VElocity Selector spectrometer, indicating that a novel WAVES (Wide-Angle VElocity Selector) device will be used to select the velocity/wavelength of the detected neutrons after they are scattered by the sample. We describe a conceptual design of BWAVES, a time-of-flight broadband inverted-geometry neutron spectrometer for the Second Target Station at the Spallation Neutron Source operated by Oak Ridge National Laboratory. Being the first inverted geometry spectrometer where the energy of the detected neutrons can be chosen by a WAVES device mechanically, irrespective of the limitations imposed by the crystal analyzers or filters, BWAVES will feature a uniquely broad, continuous dynamic range of measurable energy transfers, spanning 4.5 decades. This will enable measurements of both vibrational and relaxational excitations within the same, continuous scattering spectra. Novel approaches that are necessary for the implementation of a WAVES device at the BWAVES spectrometer will result in a spectrometer with the design and characteristics much different from those displayed by the neutron spectrometers in existence today.

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A concept of a broadband inverted geometry spectrometer for the Second Target Station at the Spallation Neutron Source

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