19 results on '"Thfoin, I."'
Search Results
2. The neutrons for science facility at SPIRAL-2
- Author
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Ledoux X., Aïche M., Avrigeanu M., Avrigeanu V., Balanzat E., Ban-d'Etat B., Ban G., Bauge E., Bélier G., Bém P., Borcea C., Caillaud T., Chatillon A., Czajkowski S., Dessagne P., Doré D., Fischer U., Frégeau M.O., Grinyer J., Guillous S., Gunsing F., Gustavsson C., Henning G., Jacquot B., Jansson K., Jurado B., Kerveno M., Klix A., Landoas O., Lecolley F.R., Lecouey J.L., Majerle M., Marie N., Materna T., Mrázek J., Negoita F., Novák J., Oberstedt S., Oberstedt A., Panebianco S., Perrot L., Plompen A.J.M., Pomp S., Prokofiev A.V., Ramillon J.M., Farget F., Ridikas D., Rossé B., Sérot O., Simakov S.P., Šimečková E., Štefánik M., Sublet J.C., Taïeb J., Tarrío D., Tassan-Got L., Thfoin I., and Varignon C.
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Physics ,QC1-999 - Abstract
Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutrons with energies from few MeV up to few tens of MeV. Reliable measurements also are necessary to improve the evaluated databases used by nuclear transport codes. This energy range covers a large number of topics like transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors. A new facility called Neutrons For Science (NFS) is being built for this purpose on the GANIL site at Caen (France). NFS is composed of a pulsed neutron beam for time-of-flight facility as well as irradiation stations for cross-section measurements. Neutrons will be produced by the interaction of deuteron and proton beams, delivered by the SPIRAL-2 linear accelerator, with thick or thin converters made of beryllium or lithium. Continuous and quasi-mono-energetic spectra will be available at NFS up to 40 MeV. In this fast energy region, the neutron flux is expected to be up to 2 orders of magnitude higher than at other existing time-of-flight facilities. In addition, irradiation stations for neutron-, proton- and deuteron-induced reactions will allow performing cross-section measurements by the activation technique. After a description of the facility and its characteristics, the experiments to be performed in the short and medium term will be presented.
- Published
- 2017
- Full Text
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3. The Neutrons for Science Facility at SPIRAL-2
- Author
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Ledoux, X., Aïche, M., Avrigeanu, M., Avrigeanu, V., Audouin, L., Balanzat, E., Ban-détat, B., Ban, G., Barreau, G., Bauge, E., Bélier, G., Bem, P., Blideanu, V., Borcea, C., Bouffard, S., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Doré, D., Fallot, M., Farget, F., Fischer, U., Giot, L., Granier, T., Guillous, S., Gunsing, F., Gustavsson, C., Jacquot, B., Jansson, K., Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F.R., Lecouey, J.L., Majerle, M., Marie, N., Materna, T., Mrazek, J., Negoita, F., Novak, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A.J.M., Pomp, S., Ramillon, J.M., Ridikas, D., Rossé, B., Rudolf, G., Serot, O., Simakov, S.P., Simeckova, E., Smith, A.G., Sublet, J.C., Taieb, J., Tassan-Got, L., Tarrio, D., Takibayev, A., Thfoin, I., Tsekhanovich, I., and Varignon, C.
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- 2014
- Full Text
- View/download PDF
4. Calibration of imaging plate detectors to mono-energetic protons in the range 1-200 MeV.
- Author
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Rabhi, N., Batani, D., Boutoux, G., Ducret, J.-E., Jakubowska, K., Lantuejoul-Thfoin, I., Nauraye, C., Patriarca, A., Saïd, A., Semsoum, A., Serani, L., Thomas, B., and Vauzour, B.
- Subjects
CALIBRATION ,DETECTORS ,PROTONS ,LUMINESCENCE ,LASERS - Abstract
Responses of Fuji Imaging Plates (IPs) to proton have been measured in the range 1-200 MeV. Monoenergetic protons were produced with the 15 MV ALTO-Tandem accelerator of the Institute of Nuclear Physics (Orsay, France) and, at higher energies, with the 200-MeV isochronous cyclotron of the Institut Curie—Centre de Protonthérapi d’Orsay (Orsay, France). The experimental setups are described and the measured photo-stimulated luminescence responses for MS, SR, and TR IPs are presented and compared to existing data. For the interpretation of the results, a sensitivity model based on the Monte Carlo GEANT4 code has been developed. It enables the calculation of the response functions in a large energy range, from 0.1 to 200 MeV. Finally, we show that our model reproduces accurately the response of more complex detectors, i.e., stack of high-Z filters and IPs, which could be of great interest for diagnostics of Petawatt laser accelerated particles. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
5. Report on the detection and acquisition systems at NFS
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Ledoux, X., Eric Bauge, Belier, G., Caillaud, T., Chatillon, A., Granier, T., Landoas, O., Taïeb, J., Rossé, B., Thfoin, I., Varignon, C., Blideanu, V., Doré, D., Gunsing, F., Panebianco, S., Ridikas, D., Takibayev, A., Aïche, M., Barreau, G., Czajkowski, S., Jurado, B., Ban, G., Lecolley, F. R., Lecolley, J. F., Lecouey, J. L., Nathalie Marie, Steckmeyer, J. C., Dessagne, P., Kerveno, M., Rudolf, G., Bem, P., Majerle, M., Mrazek, J., Novak, J., Simeckova, E., Gustavsson, C., Pomp, S., Fischer, U., Klix, K., Simakov, S. P., Jacquot, B., Farget, F., Wieleczko, J. P., Perrot, L., Tassan-Got, L., Avrigeanu, M., Avrigeanu, V., Borcea, C., Negoita, F., Petrascu, M., Oberstedt, S., Plompen, A. J. M., Muriel Fallot, Lydie Giot, Smith, G., Tsekhanovich, I., Olivier Serot, Balanzat, E., Ban-D État, B., Guillous, S., Ramillon, J. M., Oberstedt, A., Sublet, J. C., 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)
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[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] - Published
- 2012
6. Calibration of imaging plates to electrons between 40 and 180 MeV.
- Author
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Rabhi, N., Bohacek, K., Batani, D., Boutoux, G., Ducret, J.-E., Guillaume, E., Jakubowska, K., Thaury, C., and Thfoin, I.
- Subjects
POSITRONS ,ELECTRONS ,LEPTONS (Nuclear physics) ,ELECTRONIC excitation ,IONS - Abstract
This paper presents the response calibration of Imaging Plates (IPs) for electrons in the 40-180 MeV range using laser-accelerated electrons at Laboratoire d'Optique Appliquee (LOA), Palaiseau, France. In the calibration process, the energy spectrum and charge of electron beams are measured by an independent system composed of a magnetic spectrometer and a Lanex scintillator screen used as a calibrated reference detector. It is possible to insert IPs of different types or stacks of IPs in this spectrometer in order to detect dispersed electrons simultaneously. The response values are inferred from the signal on the IPs, due to an appropriate charge calibration of the reference detector. The effect of thin layers of tungsten in front and/or behind IPs is studied in detail. GEANT4 simulations are used in order to analyze our measurements. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
7. Study of imaging plate detector sensitivity to 5-18 MeV electrons.
- Author
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Boutoux, G., Rabhi, N., Batani, D., Binet, A., Ducret, J.-E., Jakubowska, K., Nègre, J.-P., Reverdin, C., and Thfoin, I.
- Subjects
DETECTORS ,ELECTRON beam research ,LASER plasmas ,ELECTRON research ,SIMULATION methods & models - Abstract
Imaging plates (IPs) are commonly used as passive detectors in laser-plasma experiments. We calibrated at the ELSA electron beam facility (CEA DIF) the five different available types of IPs (namely, MS-SR-TR-MP-ND) to electrons from 5 to 18 MeV. In the context of diagnostic development for the PETawatt Acquitaine Laser (PETAL), we investigated the use of stacks of IP in order to increase the detection efficiency and get detection response independent from the neighboring materials such as X-ray shielding and detector supports. We also measured fading functions in the time range from a few minutes up to a few days. Finally, our results are systematically compared to GEANT4 simulations in order to provide a complete study of the IP response to electrons over the energy range relevant for PETAL experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
8. Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization.
- Author
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Thfoin, I., Reverdin, C., Hulin, S., Szabo, C. I., Bastiani-Ceccotti, S., Batani, D., Brambrink, E., Koenig, M., Duval, A., Leboeuf, X., Lecherbourg, L., Rossé, B., Morace, A., Santos, J. J., Vaisseau, X., Fourment, C., Giuffrida, L., and Nakatsutsumi, M.
- Subjects
- *
SPECTROMETERS , *MONTE Carlo method , *CRYSTAL structure research , *PLASMA diagnostics , *SPECTRUM analysis - Abstract
Transmission crystal spectrometers (TCS) are used on many laser facilities to record hard X-ray spectra. During experiments, signal recorded on imaging plates is often degraded by a background noise. Monte-Carlo simulations made with the code GEANT4 show that this background noise is mainly generated by diffusion of MeV electrons and very hard X-rays. An experiment, carried out at LULI2000, confirmed that the use of magnets in front of the diagnostic, that bent the electron trajectories, reduces significantly this background. The new spectrometer SPECTIX (Spectromètre PETAL à Cristal en TransmIssion X), built for the LMJ/PETAL facility, will include this optimized shielding. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
9. Development of the large neutron imaging system for inertial confinement fusion experiments.
- Author
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Caillaud, T., Landoas, O., Briat, M., Kime, S., Rossé, B., Thfoin, I., Bourgade, J. L., Disdier, L., Glebov, V. Yu., Marshall, F. J., and Sangster, T. C.
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IMAGING systems ,NEUTRONS ,FUSION (Phase transformation) ,INERTIA (Mechanics) ,SCIENTIFIC apparatus & instruments - Abstract
Inertial confinement fusion (ICF) requires a high resolution (∼10 μm) neutron imaging system to observe deuterium and tritium (DT) core implosion asymmetries. A new large (150 mm entrance diameter: scaled for Laser MégaJoule [P. A. Holstein, F. Chaland, C. Charpin, J. M. Dufour, H. Dumont, J. Giorla, L. Hallo, S. Laffite, G. Malinie, Y. Saillard, G. Schurtz, M. Vandenboomgaerde, and F. Wagon, Laser and Particle Beams 17, 403 (1999)]) neutron imaging detector has been developed for such ICF experiments. The detector has been fully characterized using a linear accelerator and a 60Co γ-ray source. A penumbral aperture was used to observe DT-gas-filled target implosions performed on the OMEGA laser facility. [T. R. Boehly, D. L. Brown, R. S. Craxton, R. L. Keck, J. P. Knauer, J. H. Kelly, T. J. Kessler, S. A. Kumpan, S. J. Loucks, S. A. Letzring, F. J. Marshall, R. L. McCrory, S. F. B. Morse, W. Seka, J. M. Soures, and C. P. Verdon, Opt. Commun. 133, 495 (1997)] Neutron core images of 14 MeV with a resolution of 15 μm were obtained and are compared to x-ray images of comparable resolution. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
10. The neutrons for science facility at SPIRAL-2
- Author
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Ledoux, X., Aïche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-D’Etat, B., Ban, G., Bauge, E., Bélier, G., Bém, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Doré, D., Fischer, U., Frégeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, C., Henning, G., Jacquot, B., Jansson, K., Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrázek, J., Negoita, F., Novák, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, S., Prokofiev, A. V., Ramillon, J. M., Farget, F., Ridikas, D., Rossé, B., Sérot, O., Simakov, S. P., Šimečková, E., Štefánik, M., Sublet, J. C., Taïeb, J., Tarrío, D., Tassan-Got, L., Thfoin, I., and Varignon, C.
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7. Clean energy
11. Calibration of the low-energy channel Thomson parabola of the LMJ-PETAL diagnostic SEPAGE with protons and carbon ions.
- Author
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Ducret, J.-E., Batani, D., Boutoux, G., Chancé, A., Gastineau, B., Guillard, J.-C., Harrault, F., Jakubowska, K., Lantuejoul-Thfoin, I., Leboeuf, D., Loiseau, D., Lotode, A., Pès, C., Rabhi, N., Saïd, A., Semsoum, A., Serani, L., Thomas, B., Toussaint, J.-C., and Vauzour, B.
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CHARGED particle accelerators ,KINETIC energy ,DEFLECTION (Mechanics) ,ENERGY dissipation ,PROTON beams - Abstract
The SEPAGE diagnostic will detect charged particles (electrons, protons, and ions) accelerated in the interaction of the PETAL (PETawatt Aquitaine Laser) laser with its targets on the LMJ (Laser MegaJoule)–PETAL laser facility. SEPAGE will be equipped with a proton-radiography front detector and two Thomson parabolas (TP), corresponding to different ranges of the particle energy spectra: Above 0.1 MeV for electrons and protons in the low-energy channel, with a separation capability between protons and
12 C6+ up to 20 MeV proton energy and above 8 MeV for the high-energy channel, with a separation capability between protons and12 C6+ up to 200 MeV proton kinetic energy. This paper presents the calibration of the SEPAGE’s low-energy channel TP at the Tandem facility of Orsay (France) with proton beams between 3 and 22 MeV and carbon-ion beams from 5.8 to 84 MeV. The magnetic and electric fields’ integrals were determined with an accuracy of 10−3 by combining the deflections measured at different energies with different target thicknesses and materials, providing different in-target energy losses of the beam particles and hence different detected energies for given beam energies. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
12. A new compact, high sensitivity neutron imaging system.
- Author
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Caillaud, T., Landoas, O., Briat, M., Rossé, B., Thfoin, I., Philippe, F., Casner, A., Bourgade, J. L., Disdier, L., Glebov, V. Yu., Marshall, F. J., Sangster, T. C., Park, H. S., Robey, H. F., and Amendt, P.
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SENSITIVITY analysis ,NEUTRONS ,PLASMA diagnostics ,NUCLEAR facilities ,IMAGE processing ,CCD cameras ,LINEAR accelerators ,GAMMA ray sources - Abstract
We have developed a new small neutron imaging system (SNIS) diagnostic for the OMEGA laser facility. The SNIS uses a penumbral coded aperture and has been designed to record images from low yield (109-1010 neutrons) implosions such as those using deuterium as the fuel. This camera was tested at OMEGA in 2009 on a rugby hohlraum energetics experiment where it recorded an image at a yield of 1.4 × 1010. The resolution of this image was 54 μm and the camera was located only 4 meters from target chamber centre. We recently improved the instrument by adding a cooled CCD camera. The sensitivity of the new camera has been fully characterized using a linear accelerator and a 60Co γ-ray source. The calibration showed that the signal-to-noise ratio could be improved by using raw binning detection. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
13. Calibration of imaging plates to electrons between 40 and 180 MeV
- Author
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Thfoin, I. [CEA DAM DIF, F-91297 Arpajon (France)]
- Published
- 2016
- Full Text
- View/download PDF
14. The PETAL+ project: X-ray and charged particle diagnostics for plasma experiments at LMJ-PETAL.
- Author
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Ducret, J.-E., Bastiani-Ceccotti, S., Batani, D., Blanchot, N., Brambrink, E., Casner, A., Ceccotti, T., Compant La Fontaine, A., d'Humières, E., Dobosz-Dufrénoy, S., Duval, A., Fuchs, J., Hulin, S., Koenig, M., Lantuéjoul-Thfoin, I., Lefebvre, E., Marquès, J.-R., Miquel, J.-L., Reverdin, C., and Serani, L.
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PARTICLE detectors , *PLASMA diagnostics , *NUCLEAR fusion , *X-ray spectrometers , *ELECTRON spectrometers , *LASER pulses - Abstract
Abstract: The first experiments on the National Ignition Facility (NIF) in the US started and will be followed by the Laser MégaJoule (LMJ) in France. Such facilities will provide unique tools for inertial confinement fusion (ICF) physics & for basic science. A petawatt short pulse laser (ps) is being added to the ns pulse beams of the LMJ. This is PETAL (PETawatt Aquitaine Laser), under construction on the LMJ site near Bordeaux (France). The Petal+ project is aiming at the design and construction of diagnostics dedicated to experiments with PETAL and LMJ laser beams. Within Petal+, three types of diagnostics are under study: a proton spectrometer, an electron spectrometer and a large-band X-ray spectrometer. The first goal of these diagnostics will be to characterize the secondary radiation and particle sources produced with PETAL. They will also be used for experiments using both ns and ps beams. In the present paper emphasis is put on the charged-particle diagnostics. [Copyright &y& Elsevier]
- Published
- 2013
- Full Text
- View/download PDF
15. The Neutrons for Science Facility at SPIRAL-2.
- Author
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Ledoux X, Aïche M, Avrigeanu M, Avrigeanu V, Balanzat E, Ban-d'Etat B, Ban G, Bauge E, Bélier G, Bém P, Borcea C, Caillaud T, Chatillon A, Czajkowski S, Dessagne P, Doré D, Fischer U, Frégeau MO, Grinyer J, Guillous S, Gunsing F, Gustavsson C, Henning G, Jacquot B, Jansson K, Jurado B, Kerveno M, Klix A, Landoas O, Lecolley FR, Lecouey JL, Majerle M, Marie N, Materna T, Mrázek J, Novák J, Oberstedt S, Oberstedt A, Panebianco S, Perrot L, Plompen AJM, Pomp S, Prokofiev AV, Ramillon JM, Farget F, Ridikas D, Rossé B, Serot O, Simakov SP, Šimecková E, Stanoiu M, Štefánik M, Sublet JC, Taïeb J, Tarrío D, Tassan-Got L, Thfoin I, and Varignon C
- Subjects
- Computer Simulation, Radiation Dosage, Deuterium analysis, Equipment Design, Lithium chemistry, Neutrons, Particle Accelerators instrumentation, Protons
- Abstract
The neutrons for science (NFS) facility is a component of SPIRAL-2, the new superconducting linear accelerator built at GANIL in Caen (France). The proton and deuteron beams delivered by the accelerator will allow producing intense neutron fields in the 100 keV-40 MeV energy range. Continuous and quasi-mono-kinetic energy spectra, respectively, will be available at NFS, produced by the interaction of a deuteron beam on a thick Be converter and by the 7Li(p,n) reaction on thin converter. The pulsed neutron beam, with a flux up to two orders of magnitude higher than those of other existing time-of-flight facilities, will open new opportunities of experiments in fundamental research as well as in nuclear data measurements. In addition to the neutron beam, irradiation stations for neutron-, proton- and deuteron-induced reactions will be available for cross-sections measurements and for the irradiation of electronic devices or biological cells. NFS, whose first experiment is foreseen in 2018, will be a very powerful tool for physics, fundamental research as well as applications like the transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors.
- Published
- 2018
- Full Text
- View/download PDF
16. Publisher's Note: "Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization" [Rev. Sci. Instrum. 85, 11D615 (2014)].
- Author
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Thfoin I, Reverdin C, Hulin S, Szabo CI, Bastiani-Ceccotti S, Batani D, Brambrink E, Koenig M, Duval A, Leboeuf X, Lecherbourg L, Rossé B, Morace A, Santos JJ, Vaisseau X, Fourment C, Giuffrida L, and Nakatsutsumi M
- Published
- 2015
- Full Text
- View/download PDF
17. Absolute calibration method for laser megajoule neutron yield measurement by activation diagnostics.
- Author
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Landoas O, Glebov VY, Rossé B, Briat M, Disdier L, Sangster TC, Duffy T, Marmouget JG, Varignon C, Ledoux X, Caillaud T, Thfoin I, and Bourgade JL
- Abstract
The laser megajoule (LMJ) and the National Ignition Facility (NIF) plan to demonstrate thermonuclear ignition using inertial confinement fusion (ICF). The neutron yield is one of the most important parameters to characterize ICF experiment performance. For decades, the activation diagnostic was chosen as a reference at ICF facilities and is now planned to be the first nuclear diagnostic on LMJ, measuring both 2.45 MeV and 14.1 MeV neutron yields. Challenges for the activation diagnostic development are absolute calibration, accuracy, range requirement, and harsh environment. At this time, copper and zirconium material are identified for 14.1 MeV neutron yield measurement and indium material for 2.45 MeV neutrons. A series of calibrations were performed at Commissariat à l'Energie Atomique (CEA) on a Van de Graff facility to determine activation diagnostics efficiencies and to compare them with results from calculations. The CEA copper activation diagnostic was tested on the OMEGA facility during DT implosion. Experiments showed that CEA and Laboratory for Laser Energetics (LLE) diagnostics agree to better than 1% on the neutron yield measurement, with an independent calibration for each system. Also, experimental sensitivities are in good agreement with simulations and allow us to scale activation diagnostics for the LMJ measurement range.
- Published
- 2011
- Full Text
- View/download PDF
18. Alignment effects on a neutron imaging system using coded apertures.
- Author
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Thfoin I, Landoas O, Caillaud T, Disdier L, Vincent M, Bourgade JL, Rossé B, Sangster TC, Glebov VY, Pien G, and Armstrong W
- Abstract
A high resolution neutron imaging system is being developed and tested on the OMEGA laser facility for inertial confinement fusion experiments. This diagnostic uses a coded imaging technique with a penumbral or an annular aperture. The sensitiveness of these techniques to misalignment was pointed out with both experiments and simulations. Results obtained during OMEGA shots are in good agreement with calculations performed with the Monte Carlo code GEANT4. Both techniques are sensitive to the relative position of the source in the field of view. The penumbral imaging technique then demonstrates to be less sensitive to misalignment compared to the ring. These results show the necessity to develop a neutron imaging diagnostic for megajoule class lasers taking into account our alignment capabilities on such facilities.
- Published
- 2010
- Full Text
- View/download PDF
19. Diagnostics hardening for harsh environment in Laser Megajoule (invited).
- Author
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Bourgade JL, Marmoret R, Darbon S, Rosch R, Troussel P, Villette B, Glebov V, Shmayda WT, Gomme JC, Le Tonqueze Y, Aubard F, Baggio J, Bazzoli S, Bonneau F, Boutin JY, Caillaud T, Chollet C, Combis P, Disdier L, Gazave J, Girard S, Gontier D, Jaanimagi P, Jacquet HP, Jadaud JP, Landoas O, Legendre J, Leray JL, Maroni R, Meyerhofer DD, Miquel JL, Marshall FJ, Masclet-Gobin I, Pien G, Raimbourg J, Reverdin C, Richard A, Rubin de Cervens D, Sangster CT, Seaux JP, Soullie G, Stoeckl C, Thfoin I, Videau L, and Zuber C
- Abstract
The diagnostic designs for the Laser Megajoule (LMJ) will require components to operate in environments far more severe than those encountered in present facilities. This harsh environment will be induced by fluxes of neutrons, gamma rays, energetic ions, electromagnetic radiations, and, in some cases, debris and shrapnel, at levels several orders of magnitude higher than those experienced today on existing facilities. The lessons learned about the vulnerabilities of present diagnostic parts fielded mainly on OMEGA for many years, have been very useful guide for the design of future LMJ diagnostics. The present and future LMJ diagnostic designs including this vulnerability approach and their main mitigation techniques will be presented together with the main characteristics of the LMJ facility that provide for diagnostic protection.
- Published
- 2008
- Full Text
- View/download PDF
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