The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance

Ehlers, Georg; Podlesnyak, Andrey A.; Niedziela, Jennifer L.; Iverson, Erik B.; Sokol, Paul E.

doi:10.1063/1.3626935

Title: The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance

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Abstract

The design and performance of the new cold neutron chopper spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct-geometry inelastic time-of-flight spectrometer, designed essentially to cover the same energy and momentum transfer ranges as IN5 at ILL, LET at ISIS, DCS at NIST, TOFTOF at FRM-II, AMATERAS at J-PARC, PHAROS at LANSCE, and NEAT at HZB, at similar energy resolution. Measured values of key figures such as neutron flux at sample position and energy resolution are compared between measurements and ray tracing Monte Carlo simulations, and good agreement (better than 20% of absolute numbers) has been achieved. The instrument performs very well in the cold and thermal neutron energy ranges, and promises to become a workhorse for the neutron scattering community for quasielastic and inelastic scattering experiments.

Authors:

Ehlers, Georg ^[1]; Podlesnyak, Andrey A. ^[1]; Niedziela, Jennifer L. ^[1]; Iverson, Erik B. ^[1]; Sokol, Paul E. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Indiana Univ., Bloomington, IN (United States)

Publication Date:: Sat Jan 01 00:00:00 EST 2011

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1023291

DOE Contract Number:: AC05-00OR22725

Resource Type:: Journal Article

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 82; Journal Issue: 8; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COLD NEUTRONS; DATA; DESIGN; ENERGY RANGE; ENERGY RESOLUTION; INELASTIC SCATTERING; MOMENTUM TRANSFER; NEUTRON FLUX; NEUTRON SOURCES; NEUTRONS; PERFORMANCE; SCATTERING; SPALLATION; SPECTROMETERS; THERMAL NEUTRONS; TIME-OF-FLIGHT SPECTROMETERS

Citation Formats


                    Ehlers, Georg, Podlesnyak, Andrey A., Niedziela, Jennifer L., Iverson, Erik B., and Sokol, Paul E. The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance.  United States: N. p., 2011. 
        Web.  doi:10.1063/1.3626935.

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                    Ehlers, Georg, Podlesnyak, Andrey A., Niedziela, Jennifer L., Iverson, Erik B., & Sokol, Paul E. The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance.  United States.  https://doi.org/10.1063/1.3626935

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                    Ehlers, Georg, Podlesnyak, Andrey A., Niedziela, Jennifer L., Iverson, Erik B., and Sokol, Paul E. 2011.  
        "The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance".  United States.  https://doi.org/10.1063/1.3626935.

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@article{osti_1023291,

  title        = {The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source -- Design and Performance},

  author       = {Ehlers, Georg and Podlesnyak, Andrey A. and Niedziela, Jennifer L. and Iverson, Erik B. and Sokol, Paul E.},

  abstractNote = {The design and performance of the new cold neutron chopper spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct-geometry inelastic time-of-flight spectrometer, designed essentially to cover the same energy and momentum transfer ranges as IN5 at ILL, LET at ISIS, DCS at NIST, TOFTOF at FRM-II, AMATERAS at J-PARC, PHAROS at LANSCE, and NEAT at HZB, at similar energy resolution. Measured values of key figures such as neutron flux at sample position and energy resolution are compared between measurements and ray tracing Monte Carlo simulations, and good agreement (better than 20% of absolute numbers) has been achieved. The instrument performs very well in the cold and thermal neutron energy ranges, and promises to become a workhorse for the neutron scattering community for quasielastic and inelastic scattering experiments.},

  doi          = {10.1063/1.3626935},

  url          = {https://www.osti.gov/biblio/1023291},
  journal      = {Review of Scientific Instruments},

  issn         = {0034-6748},

  number       = 8,

  volume       = 82,

  place        = {United States},

  year         = {Sat Jan 01 00:00:00 EST 2011},

  month        = {Sat Jan 01 00:00:00 EST 2011}

}

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