Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars

Ahmed Moustafa; Aline Galindo-Tellez; Melinda Sweany; Erik Brubaker; John Mattingly

doi:10.1109/NSS/MIC42677.2020.9507829

Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars

Ahmed Moustafa, Aline Galindo-Tellez, Melinda Sweany, Erik Brubaker, John Mattingly

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

1 Scopus citations

Abstract

An optically-segmented single-volume scatter camera is being developed to image MeV-energy neutron sources. The design employs long, thin, optically isolated organic scintillator pillars with 5 mm × 5 mm × 200 mm dimensions (i.e., an aspect-ratio of 1:1:40). Teflon reflector is used to achieve optical isolation and improve light collection. The effect of Teflon on the ability to resolve the radiation interaction locations along such high aspect-ratio pillars is investigated. It was found that reconstruction based on the amplitude of signals collected on both ends of a bare pillar is less precise than reconstruction based on their arrival times. However, this observation is reversed after wrapping in Teflon, such that there is little to no improvement in reconstruction resolution calculated by combining both methods. It may be possible to use another means of optical isolation that does not require wrapping each individual pillar of the camera.

Original language	English
Title of host publication	2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728176932
DOIs	https://doi.org/10.1109/NSS/MIC42677.2020.9507829
State	Published - 2020
Externally published	Yes
Event	2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020 - Boston, United States Duration: Oct 31 2020 → Nov 7 2020

Publication series

Name	2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020

Conference

Conference	2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020
Country/Territory	United States
City	Boston
Period	10/31/20 → 11/7/20

Funding

ACKNOWLEDGMENT Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Hon-eywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. Release number SAND2020-13952 C. Manuscript received December 14, 2020. This work was funded by the US DOE National Nuclear Security Administration, USA, Office of Defense Nuclear Non-proliferation. A. Moustafa (e-mail: [email protected]) and J. Mattingly are with North Carolina State University, Raleigh, NC, USA. A. Galindo-Tellez is University of Hawai‘i at Ma¯noa, Honolulu, HI, USA. M. Sweany and E. Brubaker are with Sandia National Laboratories, Livermore, CA, USA.

Keywords

Fast neutron imaging
Neutron scatter camera
Nuclear security
Organic scintillators

Access to Document

10.1109/NSS/MIC42677.2020.9507829

Cite this

Moustafa, A., Galindo-Tellez, A., Sweany, M., Brubaker, E., & Mattingly, J. (2020). Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars. In 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020 (2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSS/MIC42677.2020.9507829

Moustafa, Ahmed ; Galindo-Tellez, Aline ; Sweany, Melinda et al. / Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars. 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020. Institute of Electrical and Electronics Engineers Inc., 2020. (2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020).

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title = "Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars",

abstract = "An optically-segmented single-volume scatter camera is being developed to image MeV-energy neutron sources. The design employs long, thin, optically isolated organic scintillator pillars with 5 mm × 5 mm × 200 mm dimensions (i.e., an aspect-ratio of 1:1:40). Teflon reflector is used to achieve optical isolation and improve light collection. The effect of Teflon on the ability to resolve the radiation interaction locations along such high aspect-ratio pillars is investigated. It was found that reconstruction based on the amplitude of signals collected on both ends of a bare pillar is less precise than reconstruction based on their arrival times. However, this observation is reversed after wrapping in Teflon, such that there is little to no improvement in reconstruction resolution calculated by combining both methods. It may be possible to use another means of optical isolation that does not require wrapping each individual pillar of the camera.",

keywords = "Fast neutron imaging, Neutron scatter camera, Nuclear security, Organic scintillators",

author = "Ahmed Moustafa and Aline Galindo-Tellez and Melinda Sweany and Erik Brubaker and John Mattingly",

note = "Publisher Copyright: {\textcopyright} 2020 IEEE; 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020 ; Conference date: 31-10-2020 Through 07-11-2020",

year = "2020",

doi = "10.1109/NSS/MIC42677.2020.9507829",

language = "English",

series = "2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020",

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Moustafa, A, Galindo-Tellez, A, Sweany, M, Brubaker, E & Mattingly, J 2020, Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars. in 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020. 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020, Institute of Electrical and Electronics Engineers Inc., 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020, Boston, United States, 10/31/20. https://doi.org/10.1109/NSS/MIC42677.2020.9507829

Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars. / Moustafa, Ahmed; Galindo-Tellez, Aline; Sweany, Melinda et al.
2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020. Institute of Electrical and Electronics Engineers Inc., 2020. (2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020).

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

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T1 - Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars

AU - Moustafa, Ahmed

AU - Galindo-Tellez, Aline

AU - Sweany, Melinda

AU - Brubaker, Erik

AU - Mattingly, John

PY - 2020

Y1 - 2020

N2 - An optically-segmented single-volume scatter camera is being developed to image MeV-energy neutron sources. The design employs long, thin, optically isolated organic scintillator pillars with 5 mm × 5 mm × 200 mm dimensions (i.e., an aspect-ratio of 1:1:40). Teflon reflector is used to achieve optical isolation and improve light collection. The effect of Teflon on the ability to resolve the radiation interaction locations along such high aspect-ratio pillars is investigated. It was found that reconstruction based on the amplitude of signals collected on both ends of a bare pillar is less precise than reconstruction based on their arrival times. However, this observation is reversed after wrapping in Teflon, such that there is little to no improvement in reconstruction resolution calculated by combining both methods. It may be possible to use another means of optical isolation that does not require wrapping each individual pillar of the camera.

AB - An optically-segmented single-volume scatter camera is being developed to image MeV-energy neutron sources. The design employs long, thin, optically isolated organic scintillator pillars with 5 mm × 5 mm × 200 mm dimensions (i.e., an aspect-ratio of 1:1:40). Teflon reflector is used to achieve optical isolation and improve light collection. The effect of Teflon on the ability to resolve the radiation interaction locations along such high aspect-ratio pillars is investigated. It was found that reconstruction based on the amplitude of signals collected on both ends of a bare pillar is less precise than reconstruction based on their arrival times. However, this observation is reversed after wrapping in Teflon, such that there is little to no improvement in reconstruction resolution calculated by combining both methods. It may be possible to use another means of optical isolation that does not require wrapping each individual pillar of the camera.

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M3 - Conference contribution

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BT - 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020

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ER -

Moustafa A, Galindo-Tellez A, Sweany M, Brubaker E, Mattingly J. Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars. In 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020. Institute of Electrical and Electronics Engineers Inc. 2020. (2020 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2020). doi: 10.1109/NSS/MIC42677.2020.9507829

Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long, Thin Plastic Scintillator Pillars

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