Beamline Performance Simulation for the Fundamental Neutron Physics Beamline at the Spallation Neutron Source

Conference · Sun May 01 04:00:00 EDT 2005

OSTI ID:931415

Huffman, P ^[1]; Greene, Geoffrey L ^[2]; Allen, Richard Lowell ^[2]; Cianciolo, Vince ^[2]; Huerto, Robert R ^[2]; Koehler, Paul Edward ^[2]; Desai, D ^[3]; Mahurin, R ^[3]; Yue, A ^[3]; Palmquist, G R ^[1]; Snow, William M ^[2]

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1. North Carolina State University
2. ORNL
3. University of Tennessee, Knoxville (UTK)

Monte Carlo simulations are being performed 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 choppers 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)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931415
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DESIGN
MONOCHROMATORS
NEUTRON SOURCES
NEUTRONS
OPENINGS
OPTICS
OPTIMIZATION
PERFORMANCE
PHYSICS
SIMULATION
SLOW NEUTRONS
SPALLATION