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Your search keyword '"C.E. Valrho (DCC/DTE/SLC)"' showing total 5 results
Start Over Author "C.E. Valrho (DCC/DTE/SLC)" Language english
5 results on '"C.E. Valrho (DCC/DTE/SLC)"'

1. A high-average-power copper vapor and HCl-H2 laser

Author

E. Le Guyadec, P. Regnard, Pierre Nouvel, C.E. Valrho (DCC/DTE/SLC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), and Laboratoire Chrono-environnement (UMR 6249) (LCE)

Subjects
Materials science, Switched-mode power supply, business.industry, Optical engineering, Analytical chemistry, High voltage, Optical power, Power factor, Laser, law.invention, [SPI]Engineering Sciences [physics], law, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Laser power scaling, business, ComputingMilieux_MISCELLANEOUS, Power density
Abstract

A large volume laser tube of dimensions 80-mm inner diameter by 3-m long (15.1 litres) has been built for the study of extrapolation in power of the Cu-Ne-HCl-H2 laser medium. A high power (77 kW) all solid state high voltage power supply has been also used for this purpose. Results show an improvement of the optical power after the HCl/H2 mixture injection. An optical power of 312 W has been extracted from this laser head in oscillator configuration.© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Published
2004

2. Measurement of the time-resolved X-ray emission of different elements irradiated with a subpicosecond high-power laser

Author

Chenais-Popovics, C., patrick Audebert, Nagels, V., Geindre, J. P., Gauthier, J. C., Gary, S., Girard, F., Dorchies, F., Shepherd, R., Peyrusse, O., Laboratoire pour l'utilisation des lasers intenses (LULI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Théorique et Appliquée (DPTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), C.E. Valrho (DCC/DTE/SLC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Kyrala, G. A. and Gauthier, J. C. J. and MacDonald, C. A. and Khounsary, A. M., Dorchies, Fabien, and Kyrala, G. A. and Gauthier, J. C. J. and MacDonald, C. A. and Khounsary, A. M.

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience; no abstract

Published
2003

3. A 280-W average power Cu-Ne-HBr laser amplifier

Author

E. Le Guyadec, C. Peltier, P. Coutance, G. Bertrand, C.E. Valrho (DCC/DTE/SLC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Ciblage thérapeutique en Oncologie (EA3738), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Institut de biologie moléculaire des plantes (IBMP), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), and Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)

Subjects
Materials science, Optical power, 02 engineering and technology, 7. Clean energy, 01 natural sciences, law.invention, 010309 optics, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Linear amplifier, Laser power scaling, Electrical and Electronic Engineering, ComputingMilieux_MISCELLANEOUS, Optical amplifier, business.industry, Amplifier, RF power amplifier, Power bandwidth, Condensed Matter Physics, Laser, Atomic and Molecular Physics, and Optics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, business
Abstract

A large-volume (19.5 L) laser tube has been built for the study of extrapolating power from the Cu-Ne-HBr laser medium. A high-power (50 kW) all-solid-state power supply has been also developed for this purpose. Results show a record optical power of 216 W extracted from this type of laser when used as an oscillator and 280 W as an amplifier.

Published
1999
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4. Radial and time resolved measurement of electron density in a copper vapour laser

Author

D. Gilbert, P. Lemaire, E. Le Guyadec, C. Chamouard, J. P. Goossens, C.E. Valrho (DCC/DTE/SLC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Biologie du Développement de Marseille (IBDM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Environnement, territoires et infrastructures (UR ETBX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and Aix Marseille Université (AMU)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Electron density, Materials science, Copper vapour laser, Hydrogen, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, symbols.namesake, 020210 optoelectronics & photonics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Physics::Atomic Physics, Emission spectrum, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, Active volume, Balmer series, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, chemistry, Stark effect, symbols, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Atomic physics
Abstract

The electron density ( n e ) is determined by measuring the associated microscopic Stark effect on the Balmer emission lines of atomic hydrogen present as a trace in the laser active volume. We deduce the radial and temporal evolution of n e and suggest the main physical processes leading to this evolution.

Published
1993
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5. Effect of a magnetic field on the resonant multistep selective photoionization of gadolinium isotopes

Author

R. Botter, A. Petit, J. Ravoire, E. Le Guyadec, F. Lambert, C.E. Valrho (DCC/DTE/SLC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de pharmacologie moléculaire et cellulaire (IPMC), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), and Université Nice Sophia Antipolis (1965 - 2019) (UNS)

Subjects
010302 applied physics, Physics, Photon, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Gadolinium, Photoionization mode, chemistry.chemical_element, Isotopes of gadolinium, Photoionization, 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Magnetic field, Optical pumping, chemistry, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Physics::Atomic Physics, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Atomic physics, 010306 general physics, Hyperfine structure, ComputingMilieux_MISCELLANEOUS
Abstract

A multistep photoionization with three resonant polarized photons has been used to separate the odd and even isotopes of gadolinium. Due to their hyperfine structure (I= 3 2 ), the 155,157Gd isotopes can be photoionized via a J=2→2→1→0 scheme with three п photons whereas the even isotopes cannot. If a time delay is introduced between the three laser pulses we show that the presence of a low intensity dc magnetic field affects the selectivity. The effect of this weak field on the 156Gd photoionization rate has been calculated independently of the optical pumping and the result is in good agreement with the experiment.

Published
1990
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