Scintillating glass fiber-optic neutron sensors
- and others
Pacific Northwest Laboratory (PNL) has fabricated cerium-activated lithium silicate scintillating fibers via a hot-downdraw process. These fibers, which, as produced, typically have a transmission length (e{sup {minus}1} length) of greater than 2 meters, are found to undergo aging when subjected to room air. The aging, which is complete in a few weeks, reduces the transmission length to the order of 0.5 meter. Because of the high alkali content of the glass (on the order of 20--30 mole % lithia), we have attributed this aging to aqueous corrosion oat the polymer cladding/glass interface. changes in transmission with chemical treatment of the surface support the corrosion model. Fiber transmission performance has been preserved by modifying the hot-downdraw to a double crucible to produce glass-on-glass waveguides.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10162809
- Report Number(s):
- PNL-SA-23184; CONF-940411-38; ON: DE94014562
- Resource Relation:
- Conference: Spring meeting of the Materials Research Society (MRS),San Francisco, CA (United States),4-8 Apr 1994; Other Information: PBD: Apr 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
SCINTILLATION COUNTERS
GLASS SCINTILLATORS
DRAWING
LITHIUM SILICATES
FABRICATION
OPTICAL FIBERS
NEUTRON DETECTION
WAVEGUIDES
CERIUM SILICATES
440103
360201
NUCLEAR SPECTROSCOPIC INSTRUMENTATION
PREPARATION AND FABRICATION