Developing an interface between MCNP and McStas for simulation of neutron moderators

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Abstract

Simulations of target-moderator-reflector system at spallation sources are conventionally
carried out using MCNP/X whereas simulations of neutron transport and instrument
performance are carried out by neutron ray tracing codes such as McStas. The coupling
between the two simulations suites typically consists of providing analytical fits from
MCNP/X neutron spectra to McStas. This method is generally successful, but as
will be discussed in the this paper, there are limitations and a more direct coupling
between MCNP/X andMcStas could allow for more accurate simulations of e.g. complex
moderator geometries, interference between beamlines as well as shielding requirements
along the neutron guides. In this paper different possible interfaces between McStas
and MCNP/X are discussed and first preliminary performance results are shown.
Original languageEnglish
Title of host publicationProceedings
Number of pages6
Publication date2012
Publication statusPublished - 2012
EventICANS XX: International Collaboration on Advanced Neutron Sources - Bariloche, Argentina
Duration: 4 Mar 20129 Mar 2012

Conference

ConferenceICANS XX
CountryArgentina
CityBariloche
Period04/03/201209/03/2012

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