TY - JOUR

T1 - Interfacing MCNPX and McStas for simulation of neutron transport

A1 - Klinkby,Esben Bryndt

A1 - Lauritzen,Bent

A1 - Nonbøl,Erik

A1 - Willendrup,Peter Kjær

A1 - Filges,Uwe

A1 - Wohlmuther,Michael

A1 - Gallmeier,Franz X.

AU - Klinkby,Esben Bryndt

AU - Lauritzen,Bent

AU - Nonbøl,Erik

AU - Willendrup,Peter Kjær

AU - Filges,Uwe

AU - Wohlmuther,Michael

AU - Gallmeier,Franz X.

PB - Elsevier BV North-Holland

PY - 2013

Y1 - 2013

N2 - Simulations of target-moderator-reflector system at spallation sources are conventionally carried out using Monte Carlo codes such as MCNPX[1] or FLUKA[2, 3] whereas simulations of neutron transport from the moderator and the instrument response are performed by neutron ray tracing codes such as McStas[4, 5, 6, 7]. The coupling between the two simulation suites typically consists of providing analytical fits of MCNPX neutron spectra to McStas. This method is generally successful but has limitations, as it e.g. does not allow for re-entry of neutrons into the MCNPX regime. Previous work to resolve such shortcomings includes the introduction of McStas inspired supermirrors in MCNPX. In the present paper different approaches to interface MCNPX and McStas are presented and applied to a simple test case. The direct coupling between MCNPX and McStas allows for more accurate simulations of e.g. complex moderator geometries, backgrounds, interference between beam-lines as well as shielding requirements along the neutron guides.

AB - Simulations of target-moderator-reflector system at spallation sources are conventionally carried out using Monte Carlo codes such as MCNPX[1] or FLUKA[2, 3] whereas simulations of neutron transport from the moderator and the instrument response are performed by neutron ray tracing codes such as McStas[4, 5, 6, 7]. The coupling between the two simulation suites typically consists of providing analytical fits of MCNPX neutron spectra to McStas. This method is generally successful but has limitations, as it e.g. does not allow for re-entry of neutrons into the MCNPX regime. Previous work to resolve such shortcomings includes the introduction of McStas inspired supermirrors in MCNPX. In the present paper different approaches to interface MCNPX and McStas are presented and applied to a simple test case. The direct coupling between MCNPX and McStas allows for more accurate simulations of e.g. complex moderator geometries, backgrounds, interference between beam-lines as well as shielding requirements along the neutron guides.

KW - Neutron

KW - Transport

KW - Simulation

KW - MCNPX

KW - McStas

KW - Interface

U2 - 10.1016/j.nima.2012.10.052

DO - 10.1016/j.nima.2012.10.052

JO - Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

JF - Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

SN - 0168-9002

VL - 700

SP - 106

EP - 110

ER -