Radiation effect in silica optical fiber exposed to intense mixed neutron-gamma radiation field

Author

Brichard, B. ; Borgermans, P. ; Fernandez, A. Fernandez ; Lammens, K. ; Decréton, M.

Author_Institution

Belgian Nuclear Research Centre, SCK/CEN, Mol, Belgium

Volume

48

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

2069

Lastpage

2073

Abstract

We measured in situ the radiation-induced absorption of pure silica core fibers exposed to a fission nuclear reactor. We observed the growth of the 1.39-μm. OH vibration band in polymer coated fiber. Three mechanisms are responsible for this effect: recoil protons, hydrogen diffusion, and a probable compaction effect. Based on this experiment, a fiber-optic neutron monitor prototype is proposed

Keywords

OH^--centres; fibre optic sensors; gamma-ray effects; light absorption; neutron detection; neutron effects; silicon compounds; 1.39 micron; OH vibration band; SiO₂:OH; compaction effect; fiber-optic neutron monitor prototype; fission nuclear reactor; hydrogen diffusion; intense mixed neutron-gamma radiation field; optical fiber sensor; polymer coated fiber; pure silica core fibers; radiation effect; radiation-induced absorption; recoil protons; silica optical fiber; Absorption; Compaction; Fission reactors; Hydrogen; Nuclear measurements; Optical fibers; Polymer films; Protons; Radiation effects; Silicon compounds;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.983174

Filename

983174