PVT Degradation Studies: Acoustic Diagnostics

Dib, Gerges; Tucker, Brian J.; Kouzes, Richard T.; Smith, Philip J.

doi:10.2172/1411935

Title: PVT Degradation Studies: Acoustic Diagnostics

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Abstract

Under certain environmental conditions, polyvinyl toluene (PVT) plastic scintillator has been observed to undergo internal fogging. This document reports on a study of acoustic techniques to determine whether they can provide a diagnostic for the fogging of PVT. Different ultrasound techniques were employed for detecting the level of internal fogging in PVT, including wave velocity measurements, attenuation, nonlinear acoustics, and acoustic microscopy. The results indicate that there are linear relations between the wave velocity and wave attenuation with the level of internal fogging. The effects of fogging on ultrasound wave attenuation is further verified by acoustic microscopy imaging, where regions with fog in the specimen demonstration higher levels of attenuation compared to clear regions. Results from the nonlinear ultrasound measurements were inconclusive due to high sensitivities to transducer coupling and fixture variabilities.

Authors:

Dib, Gerges ^[1]; Tucker, Brian J. ^[1]; Kouzes, Richard T. ^[1]; Smith, Philip J. ^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Publication Date:: 2017-04-01

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE; Dept. of Homeland Security (DHS) (United States)

OSTI Identifier:: 1411935

Report Number(s):: PNNL-26366
830403000

DOE Contract Number:: AC05-76RL01830

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 47 OTHER INSTRUMENTATION; PVT; degradation; acoustic sensors

Citation Formats


                    Dib, Gerges, Tucker, Brian J., Kouzes, Richard T., and Smith, Philip J.. PVT Degradation Studies: Acoustic Diagnostics.  United States: N. p., 2017. 
        Web.  doi:10.2172/1411935.

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                    Dib, Gerges, Tucker, Brian J., Kouzes, Richard T., & Smith, Philip J.. PVT Degradation Studies: Acoustic Diagnostics.  United States.  https://doi.org/10.2172/1411935

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                    Dib, Gerges, Tucker, Brian J., Kouzes, Richard T., and Smith, Philip J.. 2017.  
        "PVT Degradation Studies: Acoustic Diagnostics".  United States.  https://doi.org/10.2172/1411935.  https://www.osti.gov/servlets/purl/1411935.

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@article{osti_1411935,

  title        = {PVT Degradation Studies: Acoustic Diagnostics},

  author       = {Dib, Gerges and Tucker, Brian J. and Kouzes, Richard T. and Smith, Philip J.},

  abstractNote = {Under certain environmental conditions, polyvinyl toluene (PVT) plastic scintillator has been observed to undergo internal fogging. This document reports on a study of acoustic techniques to determine whether they can provide a diagnostic for the fogging of PVT. Different ultrasound techniques were employed for detecting the level of internal fogging in PVT, including wave velocity measurements, attenuation, nonlinear acoustics, and acoustic microscopy. The results indicate that there are linear relations between the wave velocity and wave attenuation with the level of internal fogging. The effects of fogging on ultrasound wave attenuation is further verified by acoustic microscopy imaging, where regions with fog in the specimen demonstration higher levels of attenuation compared to clear regions. Results from the nonlinear ultrasound measurements were inconclusive due to high sensitivities to transducer coupling and fixture variabilities.},

  doi          = {10.2172/1411935},

  url          = {https://www.osti.gov/biblio/1411935},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {4}

}

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