Evaluation of Distributed OFDR-Based Sensing Performance in Mixed Neutron/Gamma Radiation Environments - Archive ouverte HAL Access content directly
Journal Articles IEEE Transactions on Nuclear Science Year : 2017

Evaluation of Distributed OFDR-Based Sensing Performance in Mixed Neutron/Gamma Radiation Environments

Aziz Boukenter
Emmanuel Marin
Thierry Robin
  • Function : Author
Adriana Morana
Jocelyn Périsse
  • Function : Author
Jean-Reynald Macé
  • Function : Author
Youcef Ouerdane
B. Nacir
  • Function : Author
Philippe Paillet
  • Function : Author
  • PersonId : 951923
Sylvain Girard

Abstract

We report the study of a radiation resistant single mode optical fiber doped with fluorine exposed to mixed neutron and γ-radiation up to 10 17 n/cm 2 fluence and 2 MGy dose to evaluate its performances when used as the sensing element of a distributed Optical Frequency Domain Reflectometry (OFDR). The use of complementary spectroscopic techniques highlights some differences between the responses of solely γ-radiation (10 MGy) or mixed neutron and y (10 17 n/cm 2+ 2 MGy) irradiated samples. Those differences are linked to the defect generation rather than to structural changes of the α-SiO 2 host matrix. We show that a modification of the refractive index of ~ 10 -5 is induced at the highest investigated neutron fluence. However, the feasibility of distributed temperature measurements along the irradiated fiber is demonstrated with an accuracy of 0.1 °C over a sensing length up to ~ 130 m with the tested OBR4600 interrogator. These results are very promising for the integration of OFDR sensors in mixed neutron and gamma radiation environments
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Dates and versions

hal-01528181 , version 1 (12-03-2019)

Identifiers

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Serena Rizzolo, Aziz Boukenter, Emmanuel Marin, Thierry Robin, Marco Cannas, et al.. Evaluation of Distributed OFDR-Based Sensing Performance in Mixed Neutron/Gamma Radiation Environments. IEEE Transactions on Nuclear Science, 2017, 64 (1), pp.61-67. ⟨10.1109/TNS.2016.2606566⟩. ⟨hal-01528181⟩
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