Fogging in Polyvinyl Toluene Scintillators
Authors:
- 29 January 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 62 (1) , 368-371
Abstract
It has been observed that large polyvinyl toluene (PVT)-based gamma-ray detectors can suffer internal “fogging” when exposed to certain outdoor environmental conditions over long periods of time. When observed, this change results in reduced light collection by photomultiplier tubes connected to the PVT. Investigation of the physical cause of these changes has been explored, and a root cause identified. Water penetration into the PVT from hot, high-humidity conditions results in reversible internal water condensation at room temperature, and permanent micro-fracturing of the PVT at very low environmental temperatures. Mitigation procedures and methods are being investigated.Keywords
Funding Information
- Eljen Technology
- US Department of Energy by Battelle
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