6533b7dbfe1ef96bd12701e6
RESEARCH PRODUCT
Vulnerability of OFDR-based distributed sensors to high γ-ray doses
Sylvain GirardEmmanuel MarinJocelyn PerisseMarco CannasJean Reynald MacéSerena RizzoloYoucef OuerdaneAziz BoukenterSophie Bauersubject
Optical fiber02 engineering and technologyRadiation01 natural scienceslaw.invention010309 opticssymbols.namesake020210 optoelectronics & photonicsOpticsFiber Bragg gratinglaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectroniqueRayleigh scatteringReflectometryPhysicsRadiationbusiness.industryScatteringAttenuationFiber optics sensorsScattering RayleighAtomic and Molecular Physics and Optics[SPI.TRON]Engineering Sciences [physics]/ElectronicsFiber optic sensorsymbolsbusinessdescription
Vulnerability of Optical Frequency Domain Reflectometry (OFDR) based sensors to high γ-ray doses (up to 10 MGy) is evaluated with a specific issue of a radiation-hardened temperature and strain monitoring system for nuclear industry. For this, we characterize the main radiation effects that are expected to degrade the sensor performances in such applicative domain: the radiation-induced attenuation (RIA), the possible evolution with the dose of the Rayleigh scattering phenomenon as well as its dependence on temperature and strain. This preliminary investigation is done after the irradiation and for five different optical fiber types covering the range from radiation-hardened fibers to highly radiation sensitive ones. Our results show that at these high dose levels the scattering mechanism at the basis of the used technique for the monitoring is unaffected (changes below 5%), authorizing acceptable precision on the temperature or strain measurements. RIA has to be considered as it limits the sensing range. From our vulnerability study, the OFDR sensors appear as promising candidates for nuclear industry even at doses as high as 10 MGy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-07-01 |