A5090842367- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Radiation Detection and Scintillator Technologies
- Advanced Radiotherapy Techniques
- Photonic Crystal and Fiber Optics
- Radiation Therapy and Dosimetry
- Semiconductor Lasers and Optical Devices
- Mechanical and Optical Resonators
- Combustion and Detonation Processes
- Geophysics and Sensor Technology
- Nuclear Materials and Properties
- Analytical Chemistry and Sensors
- Risk and Safety Analysis
- Structural Health Monitoring Techniques
- Concrete Corrosion and Durability
- Magneto-Optical Properties and Applications
- Radioactive contamination and transfer
- Advanced Surface Polishing Techniques
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Nuclear Physics and Applications
- Nuclear materials and radiation effects
- Advanced Semiconductor Detectors and Materials
- Metallurgical Processes and Thermodynamics
CEA LIST
2013-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013-2024
Université Paris-Saclay
2022-2023
Laboratoire de Mesure du Carbone 14
1994-2019
Centre Léon Bérard
2011
CEA LETI
1994-2005
Direction de la Recherche Technologique
1994-2005
CEA Paris-Saclay
1994-2004
CEA Paris-Saclay - Etablissement de Saclay
2000-2004
CEA Cadarache
2001
A polymerase chain reaction (PCR) typing technique, based on the amplification of polymorphic regions from merozoite surface protein 1 (MSP-1) and MSP-2 Plasmodium falciparum genes, was used to characterize parasites collected in a longitudinal study asymptomatic carriers malaria living two distinct epidemiologic situations. Blood samples were children adults village Dielmo, Senegal, when transmission 3-6 infective bites/week/individual. For each individual, every sample at two-week...
An optical rosette that incorporates fiber Bragg gratings as strain gauges has been designed, fabricated, and tested. We investigated it by measuring the state of a thin plate test structure submitted to an increasing load in four-point bending configuration for various angular orientations. This device also successfully self-temperature-compensated situ uniaxial sensor without any dependence with high accuracy recovery analysis, leading us expect many industrial applications. Printed...
Safety must always prevail in Nuclear Power Plants (NPPs), as shown at Fukushima-Daiichi. So, innovations are clearly needed to strengthen instrumentations, which went inoperative during this nuclear accident a consequence of power supply losses. Possible improvements concern materials and structures, may be remotely monitored thanks Optical Fiber Sensors (OFS). We detail topics involving OFS helpful for monitoring, nominal conditions well severe accident. They include distributed sensing...
A new kind of instrumentation based on Optical Fiber Bragg grating sensors is proposed for the main relevant monitoring needs in electric power industry. The challenging metrological properties these components are presented and their good resistance to (gamma) -ray irradiations experimentally proved.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text P. Ferdinand, S. Magne, V. Dewynter-Marty, C. Martinez, Rougeault, and M. Bugaud, "Applications of Bragg grating sensors in Europe," 12th International Conference Optical Fiber Sensors, Vol. 16 1997 OSA Technical Digest Series (Optica Publishing Group, 1997), paper OTuB1. Export BibTex Endnote (RIS) HTML Plain alert Save article
Recent developments of stability control in mines, essentially based on Ge-doped fiber Bragg gratings (FBG) are reported including results about the different aspects system: accurate characterizations FBG, sensor network topology and multiplexing method, user interface design packaging.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Optically stimulated luminescence dosimetry (OSL-D) used in conjunction with fiber optics enables a remote measurement of dose, for the purpose radioprotection nuclear industry and medicine (radiology, radiotherapy). Alumina OSL crystals are because their low Z, fading optical transparency which improves sensitivity. An optoelectronic portable dosemeter has been designed tested that shows dose detection 50 µGy 20 meter-long fiber. Following irradiation, all trapped electrons released under...
Dynamic measurements of detonation velocity profiles are performed using long Chirped Fiber Bragg Gratings (CFBGs).Such thin probes, with a diameter typically 150 µm, inserted directly into high explosive sample or simply positioned laterally.During the detonation, width reflected optical spectrum is continuously reduced by propagation wave-front, which physically shortens CFBG.The intensity delivers ramp down signal type, related to profile.Experimental were on side three different...
This article proposes an innovative multichannel optically stimulated luminescence (OSL) dosemeter for on-line in vivo dose verification radiation therapy. OSL fibre sensors incorporating small Al2O3:C crystals (TLD500) have been tested with X-ray generator. A reproducible readout procedure should reduce the fading-induced uncertainty (∼− 1% per decade). readouts are temperature-dependent [∼0.3% K−1 when stimulation is performed at same temperature as irradiation; ∼0.16% after thermalisation...
Dynamic measurements of shock and detonation velocities are performed using long chirped fiber Bragg gratings (CFBGs). Such thin probes, with a diameter typically 125 µm or even 80 can be directly inserted into high-explosive (HE) samples simply glued laterally. During the detonation, width optical spectrum is continuously reduced by propagation wave-front, which physically shortens CFBG. The light power reflected back shows ramp-down type signal, from wave-front position obtained as...
Following the pioneering work of Lawrence Livermore National Laboratory, Chirped Fiber Bragg Gratings are investigated as in situ, real-time, wavelength-position discriminators for measuring detonation speeds inside explosives.
High pressure shock profiles are monitored using a long Fiber Bragg Grating (FBG). Such thin probe, with diameter of typically 150 μm, can be inserted directly into targets for plate experiments. The shocked FBG's portion is stressed under compression, which increases its optical group index and shortens grating period. Placed along the 2D symmetrical axis cylindrical target, second effect stronger reflected spectrum shifts towards shorter wavelengths. dynamic evolution FBG spectra recorded...
Fiber Bragg Gratings (FBGs) are used to measure shock velocity, detonation wave profile or pressure in inert and energetic materials. Such thin probe, with a diameter below 150 μm, can be inserted directly into materials without disturbing the physical phenomena. Chirped FBGs track grating using wavelengths. The velocity (few km/s) measurements realized by recording CFBG's reflected spectral width. Pressure at few GPa levels use dynamic spectrometers, two approaches compared: parallel...
An original algorithm for real-time In Vivo Dosimetry (IVD) based on Radioluminescence (RL) of dosimetric-grade Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> :C crystals is described and demonstrated in reference conditions with 12-MV photon beams from a Saturne 43 linear accelerator (LINAC), simulating External Beam Radiation Therapy (EBRT) treatments. During the course...
EDF and CEA have established an experimental program to improve knowledge of the behavior wall-slab junctions under both out-of-plane bending in-plane shear. The involved reduced-scale mock-ups made reinforced concrete (RC) that are representative structural elements nuclear plant buildings. In parallel vast campaigns, numerical models junction study derived calibrated in order computation building responses seismic excitations. analysis damaging process these structures is reproduced by...
High Order Fiber Bragg Gratings inscribed with fs-lasers by using the point-by-point technique are promising components for metrological purposes. In this study, we compare radiation-induced wavelength shifts of low-diffraction-order (2) and high-diffraction-order (745) FBGs photo-written around 1550 nm at FemtoBragg platform (CEA List) in uncoated Ge-doped P-doped core fibers. Our interrogation setup allows us observing simultaneously 80 resonance peaks high order grating. We irradiated all...
We present a manufacturing method based on the dynamic use of phase plates to photowrite Bragg gratings. This process allows for control local value index modulation envelope in grating. The application apodized fiber gratings is discussed.
Most civil engineering structures have been built in the 50's and 60's reach similar level of degradation accelerated by loading conditions corrosion. In Europe, National Authorities European Commission promote Health Monitoring concepts, instrumentation existing help design new durable higher performance. this context, CEA-List has achieved a non-exclusive industrial transfer its Bragg grating sensing technology for applications to Hydrolog (French SME), supported Community french ministry...
A wavelength tunable erbium-doped fiber ring laser dedicated to high-speed interrogation of Fiber Bragg Grating (FBG) sensors has been realised and characterized. standard FBG is used as the output mirror whereas an intra cavity spectral filter formed by a π-phase-shifted implemented narrow spectrum down 0.5 pm. The emitting tuned at 500 Hz over 3.6 nm simultaneously straining both with piezoelectric actuator. An all-fiber Michelson interferometer accurately determine scanning range....