Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS

Eszter Dian; Kalliopi Kanaki; Xiao Xiao Cai; Georg Ehlers; Richard Hallnwilton; Anton Khaplanov; Thomas Kittelmann; Peter Zagyvai

doi:10.1109/NSSMIC.2017.8532930

Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS

Eszter Dian, Kalliopi Kanaki, Xiao Xiao Cai, Georg Ehlers, Richard Hallnwilton, Anton Khaplanov, Thomas Kittelmann, Peter Zagyvai

Neutron Technologies Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

The European Spallation Source (ESS) aspires to be the worlds leading neutron source of the upcoming decades, and sets the scope on replacing ³ He tube detectors where it is reasonably achievable. The Multi-Grid detector, an Ar/CO ₂ -filled proportional chamber based on solid ¹⁰ B ₄ C converter, is the most potent replacement technology for chopper spectroscopy. This study reproduces in a detailed Geant4 geometry of a neutron scattering instrument the data from the Multi-Grid demonstrator detector, that has been tested for a 1 year period, installed side-by-side to the ³ He tubes at the CNCS instrument at SNS. For the further understanding of the background of the detector, Monte-Carlo simulations were performed, with the ESS Coding Framework, using a Geant4 version extended with NXSG4 and NCrystal. A detailed and realistic model of the prototype was built and was validated via comparison against measured data. With this model, different sources of neutron scattering were determined and studied separately, providing a better understanding of the scattered neutron background. Due to these capabilities the model will be used in the further optimization of the detector, especially for the background reduction via shielding, which will lead to instruments with better signal-to-background ratio by design.

Original language	English
Title of host publication	2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538622827
DOIs	https://doi.org/10.1109/NSSMIC.2017.8532930
State	Published - Nov 12 2018
Event	2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Atlanta, United States Duration: Oct 21 2017 → Oct 28 2017

Publication series

Name	2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings

Conference

Conference	2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017
Country/Territory	United States
City	Atlanta
Period	10/21/17 → 10/28/17

Funding

ACKNOWLEDGMENT This work has been supported by the In-Kind collaboration between ESS ERIC and the Hungarian Academy of Sciences Centre for Energy Research (MTA EK). Anton Khaplanov, Thomas Kittelmann and Richard Hall-Wilton would like to acknowledge EU Horizon2020 Brightness Grant [676548]. The authors would like to thank for the SNS data used for comparison, that was taken at CNCS at SNS under experiment ID IPTS-17219.

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10.1109/NSSMIC.2017.8532930

Cite this

Dian, E., Kanaki, K., Cai, X. X., Ehlers, G., Hallnwilton, R., Khaplanov, A., Kittelmann, T., & Zagyvai, P. (2018). Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS. In 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings Article 8532930 (2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2017.8532930

Dian, Eszter ; Kanaki, Kalliopi ; Cai, Xiao Xiao et al. / Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS. 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. (2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings).

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title = "Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS",

abstract = " The European Spallation Source (ESS) aspires to be the worlds leading neutron source of the upcoming decades, and sets the scope on replacing 3 He tube detectors where it is reasonably achievable. The Multi-Grid detector, an Ar/CO 2 -filled proportional chamber based on solid 10 B 4 C converter, is the most potent replacement technology for chopper spectroscopy. This study reproduces in a detailed Geant4 geometry of a neutron scattering instrument the data from the Multi-Grid demonstrator detector, that has been tested for a 1 year period, installed side-by-side to the 3 He tubes at the CNCS instrument at SNS. For the further understanding of the background of the detector, Monte-Carlo simulations were performed, with the ESS Coding Framework, using a Geant4 version extended with NXSG4 and NCrystal. A detailed and realistic model of the prototype was built and was validated via comparison against measured data. With this model, different sources of neutron scattering were determined and studied separately, providing a better understanding of the scattered neutron background. Due to these capabilities the model will be used in the further optimization of the detector, especially for the background reduction via shielding, which will lead to instruments with better signal-to-background ratio by design.",

author = "Eszter Dian and Kalliopi Kanaki and Cai, {Xiao Xiao} and Georg Ehlers and Richard Hallnwilton and Anton Khaplanov and Thomas Kittelmann and Peter Zagyvai",

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Dian, E, Kanaki, K, Cai, XX, Ehlers, G, Hallnwilton, R, Khaplanov, A, Kittelmann, T & Zagyvai, P 2018, Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS. in 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings., 8532930, 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings, Institute of Electrical and Electronics Engineers Inc., 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017, Atlanta, United States, 10/21/17. https://doi.org/10.1109/NSSMIC.2017.8532930

Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS. / Dian, Eszter; Kanaki, Kalliopi; Cai, Xiao Xiao et al.
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. 8532930 (2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Ehlers, Georg

AU - Hallnwilton, Richard

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AU - Zagyvai, Peter

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Dian E, Kanaki K, Cai XX, Ehlers G, Hallnwilton R, Khaplanov A et al. Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS. In 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc. 2018. 8532930. (2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings). doi: 10.1109/NSSMIC.2017.8532930

Validation of Detailed Geant4 Model for Thermal Neutron Scattering using the Results of Multi-Grid Detector Prototype Test at CNCS at SNS

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