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DOLFIN
Dedicated OpticaL FIbers for sensitive and selective Neutron dosimetry
FunderFrench National Research Agency (ANR)
Funder Contribution €551,017.00
DurationFrom 05 Jan 2026
Project codeANR-25-CE42-5886
Identifiers
Description
Nowadays, fiber optic dosimeters are recognized as an interesting alternative to the use of electronic sensors in the evaluation of different radiations (X, gamma, protons). The objective of this project is to develop glasses and fibers doped with rare earth ions in order to use them in neutron dosimetry. To do this, a combined material/simulation/component approach should lead us to optimize the emission yields and the collection of radioluminescence from doped fibers. The strategy implemented should also allow us to discriminate the doses deposited by neutrons and gamma radiation in a mixed environment, which represents a crucial issue for the nuclear industry. The proposed consortium is made up of 3 partners with extremely complementary skills: materials and fibers for ULille; dosimetry, behavior under irradiation and modeling for UJM; neutron production and implementation, validation of dosimeters for Sodern. Initial experimental results have shown the ability of cerium-doped fibers to follow the variations of a neutron flux with 14 MeV energy. Future simulations and tests should increase the sensitivity of these detectors by acting on several parameters, such as the dopant and its concentration, the design of the fibers, the signal acquisition system, the combination of different fibers, etc.
Partners (3)
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Nowadays, fiber optic dosimeters are recognized as an interesting alternative to the use of electronic sensors in the evaluation of different radiations (X, gamma, protons). The objective of this project is to develop glasses and fibers doped with rare earth ions in order to use them in neutron dosimetry. To do this, a combined material/simulation/component approach should lead us to optimize the emission yields and the collection of radioluminescence from doped fibers. The strategy implemented should also allow us to discriminate the doses deposited by neutrons and gamma radiation in a mixed environment, which represents a crucial issue for the nuclear industry. The proposed consortium is made up of 3 partners with extremely complementary skills: materials and fibers for ULille; dosimetry, behavior under irradiation and modeling for UJM; neutron production and implementation, validation of dosimeters for Sodern. Initial experimental results have shown the ability of cerium-doped fibers to follow the variations of a neutron flux with 14 MeV energy. Future simulations and tests should increase the sensitivity of these detectors by acting on several parameters, such as the dopant and its concentration, the design of the fibers, the signal acquisition system, the combination of different fibers, etc.
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