High-dose temperature-dependent neutron irradiation effects on the optical transmission and dimensional stability of amorphous fused silica

被引：35

作者：

Petrie, Christian M. ^{[1
]}

Birri, Anthony ^{[2
]}

Blue, Thomas E. ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA

[2] Ohio State Univ, 281 W Lane Ave, Columbus, OH 43210 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2019年 / 525卷

关键词：

Irradiation; Fiber optic; Transmission; Compaction; Silica; RADIATION-INDUCED ATTENUATION; VITREOUS SILICA; IN-SITU; REACTOR; FIBERS; GAMMA; COMPACTION; PRESSURE; DEFECTS; ABSORPTION;

D O I：

10.1016/j.jnoncrysol.2019.119668

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The primary concern for implementing amorphous fused silica (alpha-SiO2) fiber optic sensors in a nuclear environment is the radiation-induced attenuation (RIA) of the light signal due to the formation of radiation-induced color centers. In addition, Bragg grating sensors drift under irradiation due to radiation-induced compaction of the alpha-SiO2 structure. This work provides new data regarding RIA and radiation-induced compaction of alpha-SiO2 samples irradiated to a fast neutron fluence of 2.4 x 10(21) n/cm(2) at temperatures of 95, 298, and 688 degrees C. Results show that RIA may be approaching saturation for the range of photon energies evaluated in this paper and that the hydroxyl content has a significant impact on RIA when the irradiation temperature is increased to 688 degrees C. A model was developed for predicting radiation-induced compaction, and the resulting signal drift for Bragg grating sensors, as a function of neutron fluence and temperature.

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