Onset of Fogging and Degradation in Polyvinyl Toluene-Based Scintillators

Paul B. Rose; Alex Okowita; Michael J. Lance; Eric Sword

doi:10.1109/TNS.2020.2996535

Onset of Fogging and Degradation in Polyvinyl Toluene-Based Scintillators

Paul B. Rose, Alex Okowita, Michael J. Lance, Eric Sword

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Plastic-based gamma-ray detector materials such as polyvinyl toluene (PVT) occasionally suffer from loss of optical light transmission due to internal defects or 'fogging' when exposed to some environmental conditions over time. Fogging results in reduced scintillation light propagated to the photomultiplier tube for collection. Investigations of the physical cause of these defects and their associated environmental conditions are ongoing. The goal of this article was to characterize the signs and effects of fogging over a simulated 22-year lifespan of the PVT in outdoor environments. Two potential mitigation methods were also evaluated, and one successfully mitigated the phenomena.

Original language	English
Article number	9097937
Pages (from-to)	1765-1771
Number of pages	7
Journal	IEEE Transactions on Nuclear Science
Volume	67
Issue number	7
DOIs	https://doi.org/10.1109/TNS.2020.2996535
State	Published - Jul 2020

Funding

Manuscript received February 14, 2020; revised March 31, 2020; accepted May 18, 2020. Date of publication May 21, 2020; date of current version July 16, 2020. This work was supported by UT-Battelle, LLC with the U.S. Department of Energy (DOE) under Contract DE-AC05-00OR22725.

Funders	Funder number
UT-Battelle, LLC
U.S. Department of Energy	DE-AC05-00OR22725

Keywords

Degradation
fogging
polyvinyl toluene (PVT)
temperature cycling

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10.1109/TNS.2020.2996535

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title = "Onset of Fogging and Degradation in Polyvinyl Toluene-Based Scintillators",

abstract = "Plastic-based gamma-ray detector materials such as polyvinyl toluene (PVT) occasionally suffer from loss of optical light transmission due to internal defects or 'fogging' when exposed to some environmental conditions over time. Fogging results in reduced scintillation light propagated to the photomultiplier tube for collection. Investigations of the physical cause of these defects and their associated environmental conditions are ongoing. The goal of this article was to characterize the signs and effects of fogging over a simulated 22-year lifespan of the PVT in outdoor environments. Two potential mitigation methods were also evaluated, and one successfully mitigated the phenomena.",

keywords = "Degradation, fogging, polyvinyl toluene (PVT), temperature cycling",

author = "Rose, {Paul B.} and Alex Okowita and Lance, {Michael J.} and Eric Sword",

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AU - Lance, Michael J.

AU - Sword, Eric

PY - 2020/7

Y1 - 2020/7

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AB - Plastic-based gamma-ray detector materials such as polyvinyl toluene (PVT) occasionally suffer from loss of optical light transmission due to internal defects or 'fogging' when exposed to some environmental conditions over time. Fogging results in reduced scintillation light propagated to the photomultiplier tube for collection. Investigations of the physical cause of these defects and their associated environmental conditions are ongoing. The goal of this article was to characterize the signs and effects of fogging over a simulated 22-year lifespan of the PVT in outdoor environments. Two potential mitigation methods were also evaluated, and one successfully mitigated the phenomena.

KW - Degradation

KW - fogging

KW - polyvinyl toluene (PVT)

KW - temperature cycling

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Onset of Fogging and Degradation in Polyvinyl Toluene-Based Scintillators

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