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Beamline performance simulations for the fundamental neutron physics beamline at the spallation neutron source

Journal Article · · Journal of Research of the National Institute of Standards and Technology
DOI:https://doi.org/10.6028/jres.110.018· OSTI ID:2471523
 [1];  [2];  [3];  [3];  [3];  [3];  [4];  [4];  [4];  [5];  [5]
  1. North Carolina State University, Raleigh, NC (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. University of Tennessee, Knoxville, TN (United States)
  5. Indiana University, Bloomington, IN (United States)
+ Show Author Affiliations
Monte Carlo simulations are being per formed to design and characterize the neutron optics components for the two fundamental neutron physics beamlines at the Spallation Neutron Source. Optimization of the cold beamline includes characterization of the guides and benders, the neutron transmission through the 0.89 nm monochromator, and the expected performance of the four time-of-flight choppers. The locations and opening angles of the chop pers have been studied using a simple spreadsheet-based analysis that was developed for other SNS chopper instruments. The spreadsheet parameters are then optimized using Monte Carlo techniques to obtain the results presented in this paper. Optimization of the 0.89 nm beamline includes characterizing the double crystal monochromator and the downstream guides. The simulations continue to be refined as components are ordered and their exact size and performance specifications are determined.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2471523
Journal Information:
Journal of Research of the National Institute of Standards and Technology, Journal Name: Journal of Research of the National Institute of Standards and Technology Journal Issue: 3 Vol. 110; ISSN 1044-677X
Publisher:
National Institute of Standards (NIST)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

47 OTHER INSTRUMENTATION
Instruments & Instrumentation
McStas
Physics
neutron optics
neutron sources