Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Simulating neutron transport in long beamlines at a spallation neutron source using Geant4

Dijulio, Douglas D. LU ; Svensson, Isak ; Cai, Xiao Xiao LU ; Cederkall, Joakim LU and Bentley, Phillip M. LU (2020) In Journal of Neutron Research 22(2-3). p.183-189
Abstract

The transport of neutrons in long beamlines at spallation neutron sources presents a unique challenge for Monte-Carlo transport calculations. This is due to the need to accurately model the deep-penetration of high-energy neutrons through meters of thick dense shields close to the source and at the same time to model the transport of low- energy neutrons across distances up to around 150 m in length. Typically, such types of calculations may be carried out with MCNP-based codes or alternatively PHITS. However, in recent years there has been an increased interest in the suitability of Geant4 for such types of calculations. Therefore, we have implemented supermirror physics, a neutron chopper module and the duct-source variance reduction... (More)

The transport of neutrons in long beamlines at spallation neutron sources presents a unique challenge for Monte-Carlo transport calculations. This is due to the need to accurately model the deep-penetration of high-energy neutrons through meters of thick dense shields close to the source and at the same time to model the transport of low- energy neutrons across distances up to around 150 m in length. Typically, such types of calculations may be carried out with MCNP-based codes or alternatively PHITS. However, in recent years there has been an increased interest in the suitability of Geant4 for such types of calculations. Therefore, we have implemented supermirror physics, a neutron chopper module and the duct-source variance reduction technique for low- energy neutron transport from the PHITS Monte-Carlo code into Geant4. In the current work, we present a series of benchmarks of these extensions with the PHITS software, which demonstrates the suitability of Geant4 for simulating long neutron beamlines at a spallation neutron source, such as the European Spallation Source, currently under construction in Lund, Sweden.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Geant4, neutron supermirror, PHITS, Spallation Source
in
Journal of Neutron Research
volume
22
issue
2-3
pages
7 pages
publisher
IOS Press
external identifiers
  • scopus:85094563646
ISSN
1023-8166
DOI
10.3233/JNR-190134
language
English
LU publication?
yes
id
429d5a14-61fd-4fc8-a3e4-25485699bf97
date added to LUP
2020-11-11 01:32:31
date last changed
2022-04-19 01:47:51
@article{429d5a14-61fd-4fc8-a3e4-25485699bf97,
  abstract     = {{<p>The transport of neutrons in long beamlines at spallation neutron sources presents a unique challenge for Monte-Carlo transport calculations. This is due to the need to accurately model the deep-penetration of high-energy neutrons through meters of thick dense shields close to the source and at the same time to model the transport of low- energy neutrons across distances up to around 150 m in length. Typically, such types of calculations may be carried out with MCNP-based codes or alternatively PHITS. However, in recent years there has been an increased interest in the suitability of Geant4 for such types of calculations. Therefore, we have implemented supermirror physics, a neutron chopper module and the duct-source variance reduction technique for low- energy neutron transport from the PHITS Monte-Carlo code into Geant4. In the current work, we present a series of benchmarks of these extensions with the PHITS software, which demonstrates the suitability of Geant4 for simulating long neutron beamlines at a spallation neutron source, such as the European Spallation Source, currently under construction in Lund, Sweden. </p>}},
  author       = {{Dijulio, Douglas D. and Svensson, Isak and Cai, Xiao Xiao and Cederkall, Joakim and Bentley, Phillip M.}},
  issn         = {{1023-8166}},
  keywords     = {{Geant4; neutron supermirror; PHITS; Spallation Source}},
  language     = {{eng}},
  number       = {{2-3}},
  pages        = {{183--189}},
  publisher    = {{IOS Press}},
  series       = {{Journal of Neutron Research}},
  title        = {{Simulating neutron transport in long beamlines at a spallation neutron source using Geant4}},
  url          = {{http://dx.doi.org/10.3233/JNR-190134}},
  doi          = {{10.3233/JNR-190134}},
  volume       = {{22}},
  year         = {{2020}},
}