Search

Your search keyword '"Bon-Mardion, Michel"' showing total 8 results
Start Over Author "Bon-Mardion, Michel"
8 results on '"Bon-Mardion, Michel"'

3. Search for an Experimental Signature of Quantum Turbulence in Velocity Spectra

Author

Salort, Julien, Chillà, Francesca, Rusaouën, Éléonore, Roche, Philippe-E., Gibert, Mathieu, Moukharski, Iouri, Braslau, Alan, Daviaud, François, Gallet, Basile, Saw, Ewe-Wei, Dubrulle, Bérengère, Diribarne, Pantxo, Rousset, Bernard, Bon-Mardion, Michel, Moro, Jean-Paul, Girard, Alain, Baudet, Christophe, L'Vov, Victor, Golov, Andrei I., Nazarenko, Sergey, Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (HELFA), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Systèmes Physiques Hors-équilibre, hYdrodynamique, éNergie et compleXes (SPHYNX), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service des Basses Températures (SBT ), Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Weizmann Institute of Science [Rehovot, Israël], University of Manchester [Manchester], Institut de Physique de Nice (INPHYNI), Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), and COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)

Subjects
Physics::Fluid Dynamics, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph]
Abstract

Velocity measurements in turbulent superfluid helium betweenco-rotatingpropellers are reported.The parameters are chosen such that the flow is fully turbulent, and its dissipative scales are partlyresolved by the velocity sensors. This allows for the first experimental comparison of spectra in quan-tumversusclassical turbulence where dissipative scales are resolved. In some specific conditions,differences are observed, with an excess of energy at small scales in the quantum case compared tothe classical one. This difference is consistent with the prediction of a pileup of superfluid kineticenergy at the bottom of the inertial cascade of turbulence due to a specific dissipation mechanism.

Published
2021

5. ITER cryogenic system validation tests at helios test facility

Author

Vallcorba-Carbonell, Roser, primary, Rousset, Bernard, additional, Poncet, Jean-Marc, additional, Chang, Hyun-Sik, additional, Forgeas, Adrien, additional, Maekawa, Ryugi, additional, Serio, Luigi, additional, Bonnay, Patrick, additional, Bon-Mardion, Michel, additional, Girard, Alain, additional, Hoa, Christine, additional, Lagier, Benjamin, additional, Michel, Frederic, additional, and Roussel, Pascal, additional

Published
2012
Full Text
View/download PDF

6. Forced flow supercritical helium in a closed heat transfer loop subjected to pulsed heat loads

Author

Hoa, Christine, primary, Bonnay, Patrick, additional, Bon-Mardion, Michel, additional, Charvin, Philippe, additional, Cheynel, Jean-Noel, additional, Girard, Alain, additional, Lagier, Benjamin, additional, Michel, Frederic, additional, Monteiro, Lionel, additional, Poncet, Jean-Marc, additional, Roussel, Pascal, additional, Rousset, Bernard, additional, and Vallcorba-Carbonell, Roser, additional

Published
2012
Full Text
View/download PDF

7. Forced flow supercritical helium in a closed heat transfer loop subjected to pulsed heat loads.

Author

Hoa, Christine, Bonnay, Patrick, Bon-Mardion, Michel, Charvin, Philippe, Cheynel, Jean-Noel, Girard, Alain, Lagier, Benjamin, Michel, Frederic, Monteiro, Lionel, Poncet, Jean-Marc, Roussel, Pascal, Rousset, Bernard, and Vallcorba-Carbonell, Roser

Subjects
SUPERCRITICAL fluids, HEAT transfer, SUPERCONDUCTING magnets, TOKAMAKS, COOLING, REFRIGERATORS, HEAT exchangers, PHYSICS experiments
Abstract

The superconducting magnets of the tokamak JT-60SA are cooled by means of forced flows of supercritical helium at 4.4 K and 0.5 MPa. The closed loops transfer heat from the magnets to the refrigerator through heat exchangers immersed into a saturated liquid helium bath. An experimental loop was designed to represent a 1/20 scaled down mock-up of JT-60SA central solenoid cooling circuits. This design for keeping the same transit times in the helium circuits, aims at observing the thermally induced transients in the closed loop. Indeed, heated section simulates the variable loads coming from the magnet circuits. A series of experiments was performed with pulsed loads in an isochoric configuration of the loop. The cold circulator has been characterized under pulsed operation and its performances are addressed. Mass flow regulations at the interface of the refrigerator were tested to smooth the pulsed loads with the saturated liquid bath acting as a thermal buffer. Knowledge of the pulsed loads effects on the cryogenic components is important in view of a safe operation of the cryogenic system. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

8. ITER cryogenic system validation tests at helios test facility.

Author

Vallcorba-Carbonell, Roser, Rousset, Bernard, Poncet, Jean-Marc, Chang, Hyun-Sik, Forgeas, Adrien, Maekawa, Ryugi, Serio, Luigi, Bonnay, Patrick, Bon-Mardion, Michel, Girard, Alain, Hoa, Christine, Lagier, Benjamin, Michel, Frederic, and Roussel, Pascal

Subjects
FUSION reactors, LOW temperature engineering, TESTING laboratories, HEAT transfer, MAGNETIC fields, NEUTRONS, SUPERCONDUCTIVITY, ELECTRIC coils
Abstract

The ITER cryogenic system will have to cope with substantial dynamic heat loads due to the magnetic field variation and the production of neutrons generated by the fusion reactions. This will induce large pressure variations in the primary cooling loop of the superconducting coils, which results in the large power variation to the helium refrigerator. The HELIOS test facility, developed at CEA-Grenoble, and initially designed to study the pulse mitigation of the JT-60SA central solenoid cooling circuit (in order to smooth the pulsed load and test components), was adapted to the ITER cooling loop requirements. This paper presents the experimental results concerning the specific ITER analysis. We reproduce experimentally the pressure variation of the Central Solenoid (CS) loop predicted by a numerical model, and observe the behaviour of the circulating pump in these conditions. The investigations of the heat load smoothing methods, using the circuit of Toroidal Field Structures, such as the pulse mitigation by temporary by-pass of the flow of the Structure cooling loop, and variation of the speed of the cold circulating pump, are also presented. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results