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

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.3626935· OSTI ID:1023291
 [1];  [1];  [1];  [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Indiana Univ., Bloomington, IN (United States)
+ Show Author Affiliations
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.
Research Organization:
Oak Ridge National Laboratory (ORNL), TN (United States). Spallation Neutron Source
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1023291
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 82; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

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Related Subjects

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