Effects of Radiation and Hydrogen-Loading on the Performances of Raman-Distributed Temperature Fiber Sensors

Cangialosi, C.; Girard, Sylvain; Boukenter, Aziz; Cannas, Marco; Delépine-Lesoille, Sylvie; Bertrand, Johan; Paillet, Philippe; Marcandella, Claude; Ouerdane, Y.

doi:10.1109/jlt.2014.2388453

Cited by 21 publications

(12 citation statements)

References 12 publications

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“…As a consequence, the backscattered Stokes and anti-Stokes components generated by the same probe laser are not equally affected in the flight back to the detector, which causes the initial calibration to fail and the temperature measurement to be wrong [5]. In order to mitigate such effect several approaches were adopted: employment of radiation resistant OFs [5], applying an H 2 -loading pre-treatment to the OF sensor [6], [7], using a double-ended configuration system [8], [9]. Although the latter system successfully manages to retrieve correct temperature measurements, in order to maintain the performances of a single-ended system, it requires the access to both ends of the OF, a twice longer OF length and, therefore, a twice larger optical budget.…”

Section: Introductionmentioning

confidence: 99%

Radiation Hardened Architecture of a Single-Ended Raman-Based Distributed Temperature Sensor

Francesca

Girard

Planes

et al. 2017

IEEE Trans. Nucl. Sci.

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Raman-based Distributed Temperature Sensors (RDTS) allow performing spatially resolved (1 m) reliable temperature measurements over several km long Optical Fibers (OFs). These systems are based on the temperature dependence of the intensities of both the Stokes and anti-Stokes components of the Raman back-scattered signal. One of the specific issues associated with RDTS technology in radiation environments is the differential Radiation Induced Attenuation (RIA) between the two components that induces huge errors in the temperature evaluation. Such problem is particularly evident for commercially available single-ended DTS using one laser source. Doubleended configuration could be used to correct for the differential attenuation but are limited by RIA in terms of sensing range. In the present work, we show how a Radiation-Hardened-by-Design DTS (RHD-DTS) overcomes the observed radiation issues keeping the single-ended interrogation scheme. In the tested RHD-DTS two infrared excitation laser sources (∼1550 nm and ∼1650 nm) are employed: the wavelength of the Stokes component due to the first excitation source coincides with the wavelength of the second excitation; vice versa, the wavelength of the anti-Stokes component due to the second excitation source coincides with the wavelength of the first excitation. The overall result is that the two signal intensities are automatically corrected for the differential RIA all along the OF sensor length and the temperature measurements becomes robust against radiation effects. This study demonstrates the potential of such a sensor by reporting preliminary experimental results obtained with a prototype developed by Viavi Solutions exploiting radiationsensitive or radiation-hardened optical fibers.

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Section: Introductionmentioning

confidence: 99%

Radiation Hardened Architecture of a Single-Ended Raman-Based Distributed Temperature Sensor

Francesca

Girard

Planes

et al. 2017

IEEE Trans. Nucl. Sci.

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“…As detailed in [51,52], large temperature errors were observed along fibre samples exposed to hydrogen (80 °C with 202 bars of pressure for 62 h) then removed from the hydrogen tank, while the ratio between Stokes and Anti-Stokes Raman scattering (see Figure 16) was measured and interpreted in temperature following Equation (1). We also verify (Figure 16 right) that the presence of a carbon layer is efficient (and mandatory) to prevent hydrogen diffusion and degradation of the Raman distributed temperature sensors.…”

Section: Results On Distributed Temperature Measurementsmentioning

confidence: 99%

“…Appropriate composition for the fibre (F-doped) allows reducing the amplitude of the temperature errors due to permanent effects of radiations but this is not sufficient to obtain acceptable resolution. The pre-treatments of the fiber, i.e., the ex situ pre-irradiation at 10 MGy(SiO 2 ) reduces temperature measurement error (≤2 °C) [52]. …”

Section: Results On Distributed Temperature Measurementsmentioning

confidence: 99%

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France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Delépine-Lesoille

Girard

Landolt

et al. 2017

Sensors

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This paper presents the state of the art distributed sensing systems, based on optical fibres, developed and qualified for the French Cigéo project, the underground repository for high level and intermediate level long-lived radioactive wastes. Four main parameters, namely strain, temperature, radiation and hydrogen concentration are currently investigated by optical fibre sensors, as well as the tolerances of selected technologies to the unique constraints of the Cigéo’s severe environment. Using fluorine-doped silica optical fibre surrounded by a carbon layer and polyimide coating, it is possible to exploit its Raman, Brillouin and Rayleigh scattering signatures to achieve the distributed sensing of the temperature and the strain inside the repository cells of radioactive wastes. Regarding the dose measurement, promising solutions are proposed based on Radiation Induced Attenuation (RIA) responses of sensitive fibres such as the P-doped ones. While for hydrogen measurements, the potential of specialty optical fibres with Pd particles embedded in their silica matrix is currently studied for this gas monitoring through its impact on the fibre Brillouin signature evolution.

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“…A fully distributed OFS usually operates by measuring the surrounding environment changes along the length of the sensing fiber. Several techniques have been successfully applied to fulfill this kind of measurement, such as Brillouin 1 , Raman 2 , as well as Rayleigh scattering 3 . On the other hand, among a large amount of physical and chemical parameters that OFSs could measure, temperature and strain are the most widely studied, since many applications requiring accurate measurement of these two parameters operate in space, military or high energy physics harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Coating impact and radiation effects on optical frequency domain reflectometry fiber-based temperature sensors

et al. 2015

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International audienceTemperature response of radiation-tolerant OFDR-based sensors is here investigated, with particular attention on the impact of coating on OFS. By performing consecutive thermal treatments we developed a controlled system to evaluate the performances of our distributed temperature sensor and to estimate the radiation impact. We show an important evolution of the temperature coefficient measurements with thermal treatments for non-irradiated fiber and that the amplitude of this change decreases increasing radiation dose. As final results, we demonstrate that sensor performances are improved if we performed a pre-thermal treatment on the fiber-based system permitting to monitor temperature with an error of 0.05°C

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Effects of Radiation and Hydrogen-Loading on the Performances of Raman-Distributed Temperature Fiber Sensors

Cited by 21 publications

References 12 publications

Radiation Hardened Architecture of a Single-Ended Raman-Based Distributed Temperature Sensor

Radiation Hardened Architecture of a Single-Ended Raman-Based Distributed Temperature Sensor

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Coating impact and radiation effects on optical frequency domain reflectometry fiber-based temperature sensors

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