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8 results on '"Chatelet F"'

1. Spiral2 cryomodules B tests results

Author

Olry, G., Chatelet, F., Commeaux, C., Gandolfo, N., Grolet, D., Joly, C., Lesrel, J., Longuevergne, D., Martret, R., Michel, G., Renard, L., Stephen, A., Szott, P., Bernaudin, P.E., Beunard, R., Ferdinand, R., Lefèvre, A., Gomez-Martinez, Y., Institut de Physique Nucléaire d'Orsay (IPNO), 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), Grand Accélérateur National d'Ions Lourds (GANIL), 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), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), SPIRAL2, 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), 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), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Vernay, Emmanuelle

Subjects
[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Abstract

MOP010; International audience; Assembly and tests of the SPIRAL2 superconducting linac's cryomodules at CEA/Saclay and IPN/Orsay have now reached cruising speed after having faced a series of problems, among them contamination. 19 cryomodules are composing the whole Linac and IPN Orsay is in charge of the 7 cryomodules B, housing two 88 MHz, beta 0.12 Quarter-Wave Resonators. Threecryomodules have been assembled and successfullytested up to the nominal gradient of 6.5 MV/m for all cavities with also cryogenic losses withinspecifications. Two of them are fully qualified and already delivered to GANIL. The thirdone showed misalignment ofone cavity which could lead to partial disassembly if needed. This paper presents the results of those cryomodules tests as well as the status of the remaining ones.

Published
2013

2. Radiation hardness tests of piezoelectric actuators with fast neutrons at liquid helium temperature

Author

Fouaidy, M., Guillaume Martinet, Hammoudi, N., Chatelet, F., Olivier, A., Blivet, S., Galet, F., Institut de Physique Nucléaire d'Orsay (IPNO), and 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)

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Accelerators and Storage Rings
Abstract

Piezoelectric actuators, which are integrated into the cold tuning system and used to compensate the small mechanical deformations of the cavity wall induced by Lorentz forces due to the high electromagnetic surface field, may be located in the radiation environment during particle accelerator operation. In order to provide for a reliable operation of the accelerator, the performance and life time of piezoelectric actuators (~24.000 units for ILC) should not show any significant degradation for long periods (i.e. machine life duration: ~20 years), even when subjected to intense radiation (i.e. gamma rays and fast neutrons). An experimental program, aimed at investigating the effect of fast neutrons radiation on the characteristics of piezoelectric actuators at liquid helium temperature (i.e. T~4.2 K), was proposed for the working package WP#8 devoted to tuners development in the frame of CARE project. A neutrons irradiation facility, already installed at the CERI cyclotron located at Orléans (France), was upgraded and adapted for actuators irradiations tests purpose. A deuterons beam (maximum energy and beam current: 25 MeV and 35µA) collides with a thin (thickness: 3 mm) beryllium target producing a high neutrons flux with low gamma dose (~20%): a neutrons fluence of more than 1014 n/cm2 is achieved in ~20 hours of exposure. A dedicated cryostat was developed at IPN Orsay and used previously for radiation hardness test of calibrated cryogenic thermometers and pressure transducers used in LHC superconducting magnets. This cryostat could be operated either with liquid helium or liquid argon. This irradiation facility was upgraded for allowing fast turn-over of experiments and a dedicated experimental set-up was designed, fabricated, installed at CERI and successfully operated for radiation hardness tests of several piezoelectric actuators at T~4.2 K. This new apparatus allows on-line automatic measurements of actuators characteristics and the cryogenic parameters. Further, the test-cell and actuators are equipped with high purity Ni foils for measuring the total neutrons dose by an activation method. In this report, the details of the irradiation test facility will be described then the experimental data will be analyzed and discussed.

Published
2007

3. Electromechanical, Thermal Properties and Radiation Hardness Tests of Piezoelectric Actuators at Low Temperature

Author

Fouaidy, M., Guillaume Martinet, Hammoudi, N., Chatelet, F., Olivier, A., Blivet, S., Saugnac, H., Le Goff, A., Institut de Physique Nucléaire d'Orsay (IPNO), and 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)

Subjects
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Accelerators and Storage Rings
Abstract

IPN Orsay participates, in the frame of the CARE project activities supported by EU, to the development of a fast cold tuning system for SRF cavities. The main task of IPN is the full characterization of piezoelectric actuators at low temperature T, and the study of their behaviour when subjected to fast neutrons radiation at T=4.2 K. In order to compare the performance of various industrial piezoelectric actuators, a new apparatus was developed and successfully used for measuring their electromechanical and thermal properties for T in the range 1.8 K-300 K. Different parameters were investigated as function of T: piezoelectric constant, dielectric and thermal properties including heating ΔT due to dielectric losses vs. modulating voltage Vmod and frequency f. We observed a decrease of the maximum displacement ΔX of the actuators tested from ΔX ~40μm @ 300K down to 1.8μm-3.5 μm @ 1.8K, depending on both material and fabrication process of the piezostacks. Besides, both material and fabrication process have a strong influence on the shape of the characteristics ΔX vs. T dependence. Finally a dedicated facility located at CERI institute (Orléans, France) for radiation hardness tests of actuators with fast neutrons at T=4.2 K was developed and the first beam tests results are summarized.

Published
2005

4. Status report and performances obtained with the LHC cryogenic thermometer calibration facility

Author

Thermeau, J.P., Junquera, T., Chatelet, F., Joly, C., Mellac, F., Ruffier, D., Casas-Cubillos, J., Balle, C., Vauthier, N., Robert, Suzanne, Gistau Baguer G.,Seyfert P., Institut de Physique Nucléaire d'Orsay (IPNO), and 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)

Subjects
[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published
2003

5. [Sclerosing peritonitis. A series of 10 cases and review of the literature]

Author

Carbonnel, F., Barrié, F., Beaugerie, L., Houry, S., Chatelet, F., Gallot, D., Malafosse, M., Guerre, J., Mignon, F., Cosnes, J., Agents pathogènes et inflammation - UFC (EA 4266) (API), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Physique Nucléaire d'Orsay (IPNO), 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), 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), and Perron, Nicolas

Subjects
Adult, Liver Cirrhosis, Male, Sclerosis, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Middle Aged, Peritonitis, [CHIM.ORGA] Chemical Sciences/Organic chemistry, Diverticulitis, Colonic, Radiography, Fatal Outcome, Peritoneal Dialysis, Continuous Ambulatory, Antineoplastic Combined Chemotherapy Protocols, Humans, Female, Infusions, Parenteral, Peritoneum, Intestinal Obstruction, Aged, Retrospective Studies
Abstract

International audience; OBJECTIVE AND METHODS: The aim of this study was to describe the main features of sclerosing peritonitis, using a retrospective study in 10 patients. RESULTS: The main causes of sclerosing peritonitis were continual ambulatory peritoneal dialysis (n = 3), peritoneal chemotherapy (n = 2) and liver cirrhosis (n = 2). Sclerosing peritonitis was revealed by acute or chronic bowel obstruction (n = 8). Small bowel X-rays and abdominal tomodensitometry showed a small bowel dilatation with a normal mucosa (n = 7), ascites (n = 5) as well as agglutination and fixation of small bowel loops within a cocoon (n = 3). Surgical viscerolysis was performed in 9 patients and allowed prolonged clinical remission in 4; 3 patients died postoperatively (1 had a cirrhosis and 2 were treated with continuous ambulatory peritoneal dialysis), 1 patient had a complicated postoperative course with recurrent enterocutaneous fistulae. CONCLUSION: Sclerosing peritonitis may be suspected in a patient who presents a combination of bowel obstruction, small bowel dilatation without mucosal disease and ascites. Surgical viscerolysis is a dangerous operation associated with high mortality in patients with renal failure or cirrhosis.

Published
1995

6. Giambattista Vico : La Méthode des études de notre temps

Author

Chatelet, F., Duhamel, O., Pisier, E., Ferry, Jean-Marc, Institut de Physique Nucléaire d'Orsay (IPNO), 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), 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), Droit et changement social (DCS), Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), Université de Nantes (UN)-Université de Nantes (UN), PUF, 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), Université libre de Bruxelles (ULB), Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), and Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.HISPHILSO]Humanities and Social Sciences/History, Philosophy and Sociology of Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1986

7. Herbert Marcuse : Eros et civilisation suivi de : La notion de progrès à la lumière de la psychanalyse

Author

Chatelet, F, Duhamel, O, Pisier, E, Ferry, Jean-Marc, Droit et changement social (DCS), Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), Université de Nantes (UN)-Université de Nantes (UN), PUF, Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), and Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.HISPHILSO]Humanities and Social Sciences/History, Philosophy and Sociology of Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1986

8. Max Horkheimer : L'Etat autoritaire

Author

Chatelet, F, Duhamel, O, Pisier, E, Ferry, Jean-Marc, Droit et changement social (DCS), Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS), PUF, Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), and Université de Nantes (UN)-Université de Nantes (UN)

Subjects
[SHS.HISPHILSO]Humanities and Social Sciences/History, Philosophy and Sociology of Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1986

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