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Optimization of multi-channel neutron focusing guides for extreme sample environments

DiJulio, Douglas LU ; Lelievre-Berna, E.; Courtois, P.; Andersen, Ken LU and Bentley, Phillip LU (2014) International Workshop on Neutron Optics and Detectors (NOP&D) In International Workshop on Neutron Optics and Detectors (NOP&D 2013) 2–5 July 2013, Munich, Germany 528. p.012006-012006
Abstract
In this work, we present and discuss simulation results for the design of multi-channel neutron focusing guides for extreme sample environments. A single focusing guide consists of any number of supermirror-coated curved outer channels surrounding a central channel. Furthermore, a guide is separated into two sections in order to allow for extension into a sample environment. The performance of a guide is evaluated through a Monte-Carlo ray tracing simulation which is further coupled to an optimization algorithm in order to find the best possible guide for a given situation. A number of population-based algorithms have been investigated for this purpose. These include particle-swarm optimization, artificial bee colony, and differential... (More)
In this work, we present and discuss simulation results for the design of multi-channel neutron focusing guides for extreme sample environments. A single focusing guide consists of any number of supermirror-coated curved outer channels surrounding a central channel. Furthermore, a guide is separated into two sections in order to allow for extension into a sample environment. The performance of a guide is evaluated through a Monte-Carlo ray tracing simulation which is further coupled to an optimization algorithm in order to find the best possible guide for a given situation. A number of population-based algorithms have been investigated for this purpose. These include particle-swarm optimization, artificial bee colony, and differential evolution. The performance of each algorithm and preliminary results of the design of a multi-channel neutron focusing guide using these methods are described. We found that a three-channel focusing guide offered the best performance, with a gain factor of 2.4 compared to no focusing guide, for the design scenario investigated in this work. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
International Workshop on Neutron Optics and Detectors (NOP&D 2013) 2–5 July 2013, Munich, Germany
volume
528
pages
012006 - 012006
publisher
IOP Publishing
conference name
International Workshop on Neutron Optics and Detectors (NOP&D)
external identifiers
  • wos:000340245000006
  • scopus:84906280718
ISSN
1742-6588
1742-6596
DOI
10.1088/1742-6596/528/1/012006
language
English
LU publication?
yes
id
ea1cb030-0779-4057-b94b-fec859e7a7d9 (old id 4665632)
date added to LUP
2014-09-25 15:02:49
date last changed
2017-06-11 03:18:30
@inproceedings{ea1cb030-0779-4057-b94b-fec859e7a7d9,
  abstract     = {In this work, we present and discuss simulation results for the design of multi-channel neutron focusing guides for extreme sample environments. A single focusing guide consists of any number of supermirror-coated curved outer channels surrounding a central channel. Furthermore, a guide is separated into two sections in order to allow for extension into a sample environment. The performance of a guide is evaluated through a Monte-Carlo ray tracing simulation which is further coupled to an optimization algorithm in order to find the best possible guide for a given situation. A number of population-based algorithms have been investigated for this purpose. These include particle-swarm optimization, artificial bee colony, and differential evolution. The performance of each algorithm and preliminary results of the design of a multi-channel neutron focusing guide using these methods are described. We found that a three-channel focusing guide offered the best performance, with a gain factor of 2.4 compared to no focusing guide, for the design scenario investigated in this work.},
  author       = {DiJulio, Douglas and Lelievre-Berna, E. and Courtois, P. and Andersen, Ken and Bentley, Phillip},
  booktitle    = {International Workshop on Neutron Optics and Detectors (NOP&D 2013) 2–5 July 2013, Munich, Germany},
  issn         = {1742-6588},
  language     = {eng},
  pages        = {012006--012006},
  publisher    = {IOP Publishing},
  title        = {Optimization of multi-channel neutron focusing guides for extreme sample environments},
  url          = {http://dx.doi.org/10.1088/1742-6596/528/1/012006},
  volume       = {528},
  year         = {2014},
}