Journal article · Conference paper
Application of the MCNPX-McStas interface for shielding calculations and guide design at ESS
Center for Nuclear Technologies, Technical University of Denmark1
Radiation Physics, Center for Nuclear Technologies, Technical University of Denmark2
Department of Physics, Technical University of Denmark3
Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark4
European Spallation Source ERIC5
Paul Scherrer Institute6
Recently, an interface between the Monte Carlo code MCNPX and the neutron ray-tracing code MCNPX was developed [1, 2]. Based on the expected neutronic performance and guide geometries relevant for the ESS, the combined MCNPX-McStas code is used to calculate dose rates along neutron beam guides. The generation and moderation of neutrons is simulated using a full scale MCNPX model of the ESS target monolith.
Upon entering the neutron beam extraction region, the individual neutron states are handed to McStas via the MCNPX-McStas interface. McStas transports the neutrons through the beam guide, and by using newly developed event logging capability, the neutron state parameters corresponding to un-reflected neutrons are recorded at each scattering.
This information is handed back to MCNPX where it serves as neutron source input for a second MCNPX simulation. This simulation enables calculation of dose rates in the vicinity of the guide. In addition the logging mechanism is employed to record the scatterings along the guides which is exploited to simulate the supermirror quality requirements (i.e. m-values) needed at different positions along the beam guide to transport neutrons in the same guide/source setup.
Language: | English |
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Publisher: | IOP Publishing |
Year: | 2014 |
Pages: | 012032 |
Proceedings: | International Workshop on Neutron Optics and Detectors |
ISSN: | 17426596 and 17426588 |
Types: | Journal article and Conference paper |
DOI: | 10.1088/1742-6596/528/1/012032 |
ORCIDs: | Klinkby, Esben Bryndt , Bergbäck Knudsen, Erik , Lauritzen, Bent and Nonbøl, Erik |