Search

Your search keyword '"Konovalenko, Alexander"' showing total 28 results
Start Over Author "Konovalenko, Alexander" Database OpenAIRE
28 results on '"Konovalenko, Alexander"'

1. The low-frequency radio telescope NenuFAR

Author

Zarka, Philippe, Denis, Laurent, Tagger, Michel, Girard, Julien, Coffre, Andrée, Dumez-Viou, Cédric, Taffoureau, Christophe, Charrier, Didier, Bondonneau, Louis, Briand, Carine, Casoli, Fabienne, Cecconi, Baptiste, Cognard, Ismaël, Corbel, Stéphane, Dallier, Richard, Ferrari, Chiara, Grießmeier, Jean-Mathias, Loh, Alan, Martin, Lilian, Pommier, Mamta, Benoit, Semelin, Tasse, Cyril, Theureau, Gilles, Tremou, Evangelia, Capayrou, D, Censier, B, Cottet, P, Etieve, V, Floquet, F, Garnier, S, Georges, G, Gond, B, Jacquet, F, Joly, S, Gall, A, Roziere, C, Thetas, E, Vimon, J.-B, Guilbeau, R, Sandre, P, Courte, C, Desvignes, G, Marchand, A, Alves, M, Azarian, S, Bonnassieux, E, Brionne, M, Chassande-Mottin, E, Combes, F, Cornilleau-Wehrlin, N, Decoene, V, Gérard, E, Gusdorf, A, Lamy, L, Masson, S, Mertens, F, Mottez, F, Petri, J, Vilmer, N, Weber, R, Hellbourg, Greg, Konovalenko, Alexander, Koopmans, Leon, Tokarsky, Peter, Ulyanov, Oleg, Vermeulen, Rene, Zakharenko, Vyacheslav, Cecconi, Baptiste, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Unité Scientifique de la Station de Nançay (USN), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres (LERMA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Observatoire astronomique de Strasbourg (ObAS), and Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [PHYS.ASTR.IM] Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; NenuFAR is a new, large low-frequency radio telescope, in construction and commissioning at the Nançay Radioastronomy Observatory, that starts to provide high sensitivity observations in the 10-85 MHz range. NenuFAR’s 1938 dual polarization antennas are connected to a suite of receivers allowing the instrument to operate, simultaneously if needed, in 4 distinct modes : as a standalone beamformer, a standalone imager, a waveform snapshots recorder, and a giant low-frequency station of the LOFAR array. We provide here an overview of the antennas, receivers, data products, operation and scientific context of the instrument.

Published
2020

2. Experiments and Characterization of the Two-Phase Flow Driven Particulate Debris Spreading in the Pool

Author

Konovalenko, Alexander, Basso, Simone, and Kudinov, Pavel

Subjects
two-phase flow, Other Physics Topics, Particulate spreading, coolability, hög, turbulence, Annan fysik, turbulens, debris, Partikel spridning, kylbarhet, tvåfasflöde
Abstract

Melt fragmentation, quenching and long term coolability in a deep pool of water under reactor vessel are employed as a severe accident mitigation strategy in several designs of light water reactors. Success of the strategy is contingent upon effectiveness of natural circulation in removing the decay heat generated by the porous debris bed. Geometrical configuration of the bed is one of the factors which affect coolability of the bed. Boiling and two-phase turbulent flows in the pool serve as a source of mechanical energy which can affect the initial geometry as well as dynamically change the shape of already formed debris bed. The main goal of this work is to provide experimental data on spreading of solid particles in the pool by large scale two-phase flow structures induced by gas injection from the bottom. These data are necessary for development and validation of predictive capabilities of computer codes allowing numerical modeling of the debris bed formation at prototypic severe accident conditions. Results of a new series of PDS-P (Particulate Debris Spreading in the Pool) tests reported in this paper are for two types of tests: (i) the pure two-phase flows without particles and (ii) tests with particles. In both tests series, vapor flows in saturated water are simulated by air injection at the bottom of the facility. Experimental conditions such as gas-phase flow rate and particle properties (density, size etc.) are scaled to maintain relevancy to the prototypic accident conditions. The water pool is constructed as a rectangular tank. It has close to 2D geometry with fixed width (72 mm), variable length (up to 1.6 m) and allows water filling depth of up to 1 m. The variable pool length and depth allows formation of the different in size and pattern two-phase circulating flows. The average void fraction in the pool is determined by video recording and image processing. Particles are supplied from the top of the facility above the water surface. In the separate-effect studies of the influence of two-phase currents on particle trajectories and bed formation, low particle flow rate is required in order to minimize or completely exclude particle-particle interaction. QC 20150424 APRI

Published
2014

3. Insight into steam explosion in stratified melt-coolant configuration

Author

Grishchenko, Dmitry, Konovalenko, Alexander, Karbojian, Aram, Kudinova, Valtyna, Bechta, Sevostian, and Kudinov, Pavel

Subjects
stratification, Other Physics Topics, Other Engineering and Technologies not elsewhere specified, Annan fysik, Övrig annan teknik, light water reactor, melt-coolant interaction, melt, PULiMS, steam explosion
Abstract

Release of core melt from failed reactor vessel into a pool of water is adopted in several existing designs of light water reactors (LWRs) as an element of severe accident mitigation strategy. When vessel breach is large and water pool is shallow, released corium melt can reach containment floor in liquid form and spread under water creating a stratified configuration of melt covered by coolant. Steam explosion in such stratified configuration was long believed as of secondary importance for reactor safety because it was assumed that considerable mass of melt cannot be premixed with the coolant. In this work we revisit these assumptions using recent experimental observations from the stratified steam explosion tests in PULiMS facility. We demonstrate that (i) considerable melt-coolant premixing layer can be formed in the stratified configuration with high temperature melts, (ii) mechanism responsible for the premixing is apparently more efficient than previously assumed Rayleigh-Taylor or Kelvin-Helmholtz instabilities. We also provide data on measured and estimated impulses, energetics of steam explosion, and resulting thermal to mechanical energy conversion ratios. QC 20131212

Published
2013

4. Farside explorer: unique science from a mission to the farside of the moon

Author

Mimoun, David, Wieczorek, Mark A, Alkalai, Leon, Banerdt, W Bruce, Baratoux, David, Bougeret, Jean-Louis, Bouley, Sylvain, Cecconi, Baptiste, Falcke, Heino, Flohrer, Joachim, Garcia, Raphael F., Grimm, Robert, Grott, Matthias, Gurvits, Leonid, Jaumann, Ralf, Johnson, Catherine L., Knapmeyer, Martin, Konovalenko, Alexander, Lawrence, David, Le, Feuvre Mathieu, Lognonnee, Philippe, Neal, Clive, Oberst, Juurgen, Olsen, Nils, Roottgering, Huub, Spohn, Tilman, Vennerstrom, Susanne, Woan, Graham, Zarka, Philippe, Kobayashi, Naoki, Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Department of Astrophysics [Nijmegen], Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud university [Nijmegen]-Radboud university [Nijmegen], Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Los Alamos National Laboratory (LANL), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Midori-ku, Tokyo Institute of Technology [Tokyo] (TITECH), London School of Hygiene and Tropical Medicine (LSHTM), Technische Universität Berlin (TU), National Space Institute [Lyngby] (DTU Space), Technical University of Denmark [Lyngby] (DTU), Leiden Observatory [Leiden], Universiteit Leiden [Leiden], German Aerospace Center (DLR), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Technische Universität Berlin (TUB), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Radboud University [Nijmegen]-Radboud University [Nijmegen], Technical University of Berlin / Technische Universität Berlin (TU), Danmarks Tekniske Universitet = Technical University of Denmark (DTU), and Universiteit Leiden

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, Solar System, Cosmic Vision, 010504 meteorology & atmospheric sciences, Astronomy, Lagrangian point, 01 natural sciences, Moon · Farside · Radio astronomy · Geophysics · Impact flux · ESA’s Cosmic Vision program, Astrobiology, Physics::Geophysics, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Impact crater, Autre, Planet, 0103 physical sciences, Impact flux, Radio astronomy, Moon, 010303 astronomy & astrophysics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Physics, [PHYS]Physics [physics], Near-Earth object, Astronomy and Astrophysics, Farside, ESA’s Cosmic Vision program, Geophysics, Space and Planetary Science, ESA's Cosmic Vision Program, Physics::Space Physics, Satellite, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Halo orbit
Abstract

著者人数: 30名, Accepted: 2011-08-04, 資料番号: SA1003261000

Published
2012

5. Development of Scaling Approach for Prediction of Terminal Spread Thickness of Melt Poured into a Pool of Water

Author

Konovalenko, Alexander and Kudinov, Pavel

Subjects
melt pouring, Other Physics Topics, scaling, pulims, Annan fysik, corium, uncertainty, sensitivity, spreading model
Abstract

Corium melt stabilization and long term cooling in a pool of water located beneath reactor vessel is adopted in several existing designs of light water reactors (LWRs) as an element in severe accident (SA) mitigation strategy. At certain conditions of melt release into the pool (e.g. large ratio of the vessel breach size to the pool depth), liquid melt can spread under water and reach a coolable configuration. Coolability of the melt is contingent on terminal spread thickness of the melt layer \delta_{sp} which defines decay heat generated per unit area of the melt surface. The thickness of the melt layer is determined by the competition between characteristic time scales of hydrodynamic melt spreading and solidification of the melt. This paper presents a modification of the scaling approach, originally proposed by Dinh et al. (2000) for prediction of the terminal melt spread thickness, to the case when liquid melt jet is poured into a pool of water and allow to spread unrestricted on a horizontal floor of the pool. Modified scaling approach takes into account mass and heat losses during to melt jet interaction with the coolant. The hydrodynamic spreading timescale is described with phenomenological approaches proposed by Huppert and Britter (1982) and Britter (1979). Proposed model is validated against PULiMS experiments (Pouring and Underwater Liquid Melt Spreading Konovalenko et al., 2012). Finally, sensitivity analysis and preliminary assessments of the uncertainties are performed for the PULiMS test conditions. BEST PAPER AWARD!QC 20131216

Published
2012

6. Experimental and Analytical Study of the Particulate Debris Bed Self-leveling

Author

Konovalenko, Alexander, Basso, Simone, Karbojian, Aram, and Kudinov, Pavel

Subjects
safety, particle, Other Physics Topics, coolability, Annan fysik, LWR, corium, spreading, debris, self-leveling, particulate
Abstract

Melt fragmentation, quenching and long term coolability in a deep pool of water under reactor vessel is employed as a severe accident (SA) mitigation strategy in several designs of light water reactors (LWR). Geometrical configuration of the debris bed is one of the factors which define if the decay heat can be removed from the debris bed by natural circulation. Boiling and two-phase flow inside the bed also serves as a source of mechanical energy which can reduce the height of the debris bed by so called “self-leveling” phenomenon. However, to be effective in providing a coolable geometrical configuration, self-leveling time scale has to be smaller than the time scale for drying out and onset of re-melting of the bed. This paper presents results of experimental and analytical studies concerning the self-leveling phenomenon. The goal of this work is to assess characteristic time scale of particulate debris spreading. In the experiments on the particulate debris spreading air injection at the bottom of the bed is used to simulate steam flow through the porous debris bed. A series of test have been carried out to study the influence of particles size and density, roughness of the spreading plate, gas flow rate etc. on particulate spreading. A semi-empirical model for predicting the spreading of particulate debris has been developed using experimental closures for debris mass flow rate as a function of local (i) angle of the bed and (ii) gas flux. The comparison between the model prediction and the experimental observations shows a good agreement. QC 20131216

Published
2012

7. Experimental Results on Pouring and Underwater Liquid Melt Spreading and Energetic Melt-coolant Interaction

Author

Konovalenko, Alexander, Karbojian, Aram, and Kudinov, Pavel

Subjects
underwater melt spreading, Other Physics Topics, Other Engineering and Technologies not elsewhere specified, Övrig annan teknik, Annan fysik, melt, spreading, PULiMS, steam explosion
Abstract

In a hypothetical light water reactor (LWR) core-melt accident with corium release from the reactor vessel, the ultimate containment integrity is contingent on coolability of the decay-heated core debris. Pouring of melt into a pool of water located in the reactor cavity is considered in several designs of existing and new LWRs as a part of severe accident (SA) management strategies. At certain conditions of melt release into the pool (e.g. large ratio of the vessel breach size to the pool depth), liquid melt can spread under water and reach a coolable configuration. Coolability of the melt depends on decay heat generated per unit area of the spread melt which is directly proportional to the terminal spread thickness of the melt layer. Thus a success of the debris bed coolability depends on the efficacy of the molten core materials spreading which is limited by rapid solidification of the melt due to melt-coolant heat transfer. Among the factors which can reduce spreading effectiveness are heat and mass losses of the liquid melt due to fragmentation, cooling and solidification in the process of melt jet pouring into the pool. Previous extensive experimental and analytical works on liquid melt spreading and solidification were focused mostly on analysis of melt spreading in case of melt release through an inclined channel. Melt spreading under water as a result of a jet pouring into a pool, has not been addressed systematically. This paper summarizes first experimental results obtained in the frame of Pouring and Underwater Liquid Melt Spreading (PULiMS) research program. The work is an extension of previously reported by Kudinov et al. [1-4] studies on debris bed formation and agglomeration (DEFOR-A) phenomena. In contrast to DEFOR-A experiments, PULiMS exploratory tests (PULiMS-E) discussed in this work have been performed with a shallow (20 cm) water pool. Up to 78 kg of high melting temperature core melt simulant materials (eutectic mixtures of the binary oxides such as Bi 2 O 3 -WO 3 and ZrO 2 -WO 3 ) is used in each test. Initial melt superheat varied from 70 up to 300ºC. In the paper we discuss: (i) experimental observations of the jet pouring into a shallow pool and underwater liquid melt spreading on a flat surface; (ii) characterization of solidified melt debris; (iii) key physical processes as well as melt material properties and experimental conditions most influencing the melt spreading and solidification phenomena. Produced experimental data can be used for validation of the models for prediction of the underwater liquid melt spreading in case of melt jet pouring in a shallow water pool. QC 20131212

Published
2012

8. Radio-Exopla collaboration, Ground based detection and study of Saturn Electrostatic Discharges

Author

Grießmeier, Jean-Mathias, Zarka, Philippe, Konovalenko, Alexander A., Et Al., Et Al., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2008

9. The search of planetary and stellar decameter wavelength radio emissions by the use of the world largest radio telescope

Author

Konovalenko, Alexander A., Rucker, Helmut O., Lecacheux, Alain, Zarka, Philippe, Grießmeier, Jean-Mathias, Melnik, Valentin N., Et Al., Et Al., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2008

10. LOFAR-CM: A low frequency array station in the Carpathian Mountains

Author

Rucker, Helmut O., Karlsson, R., Konovalenko, Alexander A., Zarka, Philippe, Oswald, T. H., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2008

11. Spin transfer torques and spin dynamics in point contacts and spin-flop tunnel junctions

Author

Konovalenko, Alexander

Subjects
spin transfer torques, point contacts, Physical Sciences, magnetization dynamics, Fysik, spin dynamics
Abstract

The first part of this thesis is an experimental study of the spin-dependent transport in magnetic point contacts. Nano-contacts are produced micromechanically, by bringing a sharpened non-magnetic (N) tip into contact with a ferromagnetic (F) film. The magnetic and magneto-transport properties of such N/F nanocontacts are studied using transport spectroscopy, spanning the ballistic, diffusive, and thermal transport regimes. Single N/F interfaces can exhibit current driven magnetic excitations, which are often manifest as peaks in the differential resistance of a point contact defining the N/F interface. Our experiments show that such surface magnetization excitations, and thus the single-interface spin torques, are observed for diffusive and thermal transport regimes where the conduction electrons experience strong scattering near the N/F interface, and are absent for purely ballistic contacts. We conclude that the single-interface spin torque effect is due to impurity scattering at N/F interfaces. Single N/F interfaces can also exhibit hysteretic conductivity, which is qualitatively similar to the spin-valve effect found in F/N/F trilayers. Based on our measurements of N/F point contacts in the size range of 1-30 nm, we propose two mechanisms of the observed hysteresis. The first mechanism relies on a non-uniform spin distribution near the contact core and is magnetoelastic in origin. This interpretation is in good agreement with some of our experiments on larger point contacts as well as with a numerical micromagnetic model we have developed, where a stress-induced anisotropy creates a non-uniform, domain-wall-like spin distribution in the contact core. The second mechanism we propose is a surface effect which relies on a difference between the surface and interior spins in the ferromagnet in terms of their exchange and anisotropy properties. The surface spin-valve mechanism is in good agreement with the hysteretic magnetoresistance observed for our smallest contacts (~1 nm) and for contacts to nanometer thin ferromagnetic films. This interpretation means that the surface magnetization can be reduced and weakly coupled to the interior spins in the ferromagnet. We find that this surface spin layer can be affected by both external fields and the spin torque of a transport current. The surface magnetization can even form nano-sized spin vorticies at the interface. The nature of the magnetic excitations induced by by nominally unpolarized currents through single N/F interfaces was probed directly using microwave irradiation. We observed two characteristic high-frequency effects: a resonant stimulation of spin-wave modes by microwaves, and a rectification of off-resonant microwave currents by spin-wave nonlinearities in the point contact conductance. These experiments demonstrate that the effects observed are spin-dynamic in nature. In the second part of the thesis we study the spin-dynamics in spin-flop tunnel junctions used in toggle magnetic random access memory. Current pulses in the range of 100 ps used to excite the magnetic moments of the two coupled Py free layers into an oscillatory state, in both the antiparallel and scissor states of the cell. These oscillations are detected directly by measuring the junction resistance in real time with a 6 GHz measurement bandwidth. The junctions had the shape of an ellipse, with lateral size ranging from 350x420 to 400x560 nm. The optical and acoustical precession modes of the the spin-flop trilayer are observed in experiment, as expected from single-domain model. The experimental spectra contain additional features, which are explained using numerical micromagnetic simulations, as originating from magnetic state transitions between different magnetization states with non-uniform spin distributions. QC 20100818

Published
2008

12. Ground- and Space-based Radio Observations of Planetary Lightning

Author

Zarka, Philippe, Konovalenko, Alexander A., Fischer, Georg, Farrell, William M., Cecconi, Baptiste, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2007

13. Ground-based decameter wavelength observations of Saturn electrostatic discharges

Author

Konovalenko, Alexander A., Lecacheux, Alain, Rucker, Helmut O., Fischer, Georg, Abranin, E. P., Kalinichenko, Nikolay Nikolaevich, Falkovich, Igor Savelievich, Sidorchuk, K. M., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

14. New high sensitive investigation of the modulation effects in the sporadic Jovian DAM emission

Author

Litvinenko, G. V., Rucker, Helmut O., Lecacheux, Alain, Konovalenko, Alexander A., Vinogradov, V. V., Shaposhnikov, V. E., Taubenschuss, Ulrich, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

15. Study of Solar-Terrestrial Connections in the Highlight of Simultaneous Observations with STEREO and UTR-2, URAN, NDA Ground-Based Radio Telescopes

Author

Melnik, Valentin N., Rucker, Helmut O., Konovalenko, Alexander A., Lecacheux, Alain, Falkovich, Igor Savelievich, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

16. Comparative Analysis Of Solar Observations To A Strong Absorption On Background Of Sporadic Radio Emission From The Sun

Author

Konovalenko, Alexander A., Stanislavsky, A. A., Abranin, E. P., Dorovskyy, V. V., Melnik, Valentin N., Kaiser, Michael L., Lecacheux, Alain, Rucker, Helmut O., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

17. Current Status of Long Wavelengths Radio Astronomy in Ukraine

Author

Konovalenko, Alexander A., Melnik, Valentin N., Falkovich, Igor Savelievich, Rashkovsky, S. L., Brazhenko, A. I., Koshevoj, V. V., Lecacheux, Alain, Rucker, Helmut O., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

18. High Sensitive Investigations of the Sporadic Jovian Radio Emission

Author

Lytvynenko, G. V., Lecacheux, Alain, Konovalenko, Alexander A., Vinogradov, V. V., Shaposhnikov, V. E., Rucker, Helmut O., Taubenschuss, Ulrich, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

19. Detection Of The Individual Pulses Of The Pulsars 0809+74; 0834+06; 0950+08; 0943+10; 1133+16 At Decameter Wave Range

Author

Ulyanov, Oleg M., Zakharenko, V. V., Konovalenko, Alexander A., Lecacheux, Alain, Rosolen, C., Rucker, Helmut O., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

20. Variations of Parameters of the Solar Wind Stream Structure at the Distances More than 1 AU in 2003-2004

Author

Falkovich, Igor Savelievich, Konovalenko, Alexander A., Kalinichenko, Nikolay Nikolaevich, Olyak, M. R., Gridin, Alexander Alexandrovich, Bubnov, I. N., Lecacheux, Alain, Rucker, Helmut O., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

21. Solar U- and J- Bursts at the Frequencies 10-30MHz

Author

Dorovskyy, V. V., Melnik, Valentin N., Konovalenko, Alexander A., Abranin, E. P., Rucker, Helmut O., Lecacheux, Alain, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

22. Properties of Solar Spikes at Decameter Wavelengths

Author

Melnik, Valentin N., Konovalenko, Alexander A., Shevchuk, N. V., Rucker, Helmut O., Abranin, E. P., Dorovskyy, V. V., Lecacheux, Alain, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

23. Sporadic Radio Emission of the Sun in the Decameter Range

Author

Melnik, Valentin N., Konovalenko, Alexander A., Rucker, Helmut O., Lecacheux, Alain, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

24. Sporadic Decameter Radio Emission of the Sun

Author

Melnik, Valentin N., Konovalenko, Alexander A., Rucker, Helmut O., Lecacheux, Alain, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2006

25. Sporadic solar radio emission at decameter wavelengths

Author

Melnik, Valentin N., Konovalenko, Alexander A., Abranin, E. P., Dorovskyy, V. V., Lisachenko, V. N., Stanislavsky, A. A., Rucker, Helmut O., Lecacheux, Alain, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des plasmas, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
Astrophysics::High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Decameter Radioastronomy [MS1]
Abstract

Results of observations of the solar sporadic radio emission in decameter range are presented. These observations were carried out at UTR-2 radio telescope with 60-channel spectrometer and DSP (Digital Spectral Polarimeter) last years. Particular attention is devoted to such components of sporadic radio emission as Type III bursts, Type II bursts, “drift pair” bursts. New properties of these bursts, which distinguished for decameter band, are noted. They are as follows: – fine structure of Type III bursts unobserved before at other frequencies; – first discovered fine structure of Type II bursts in the form of small duration sub bursts with positive and negative frequency drift; – wavelike movement of Type II burst backbone with herringbone structure; – difference of frequency drift rates of “drift pair” bursts with positive and negative rates.

Published
2005

26. Sharing Low Frequency Radio Emissions in the Virtual Observatory: Application for JUNO-Ground-Radio Observations Support

Author

Cecconi, Baptiste, Savane, Renaud, Le Sidaner, Pierre, Hess, Sébastien L G, Erard, Stéphane, Zarka, Philippe, Lamy, Laurent, Coffre, Andrée, Denis, laurent, André, Nicolas, Génot, Vincent, Girard, Julien N G, Grießmeier, Jean-Mathias, Clarke, Tracy, Anderson, Marin, Ebert, Robert, Higgins, Charles, Sky, Jim, Thieman, James, Typinski, Dave, Hobara, Yasuhide, Imai, Kazumasa, Kurth, William S, Imai, Masafumi, Kasaba, Yasumasa, Kumamoto, Atsushi, Tsuchiya, Fuminori, Misawa, Hiroaki, Konovalenko, Alexander, Nakajo, Tomoyuki, Orton, Glenn S, and Ryabov, Vladimir

Subjects
13. Climate action, Jupiter, Radio Astronomy, Virtual Observatory
Abstract

In the frame of the preparation of the NASA/JUNO and ESA/JUICE (Jupiter Icy Moon Explorer) missions, and the development of a planetary sciences virtual observatory (VO), we are proposing a new set of tools directed to data providers as well as users, in order to ease data sharing and discovery. We will focus on ground based planetary radio observations (thus mainly Jupiter radio emissions), trying for instance to enhance the temporal coverage of jovian decametric emission. The data service we will be using is EPN-TAP, a planetary science data access protocol developed by Europlanet-VESPA (Virtual European Solar and Planetary Access). This protocol is derived from IVOA (International Virtual Observatory Alliance) standards. Data from all major decametric radio instruments will contribute: Nançay Decameter Array (France), LOFAR (France, Sweden, Poland), NenuFAR (France), URAN (Ukraine), LWA (USA), Iitate Radio Observatory (Japan), etc. Amateur radio data from the RadioJOVE project is also available. The attached figure shows data from those three providers. We will first introduce the VO tools and concepts of interest for the planetary radioastronomy community. We will then present the various data formats now used for such data services, as well as their associated metadata. We will finally show various prototypical tools that make use of this shared datasets.

27. Astrometry of the Solar System Bodies with VLBI Radar

Author

Molotov, Igor, Nechaeva, Maria, Falkovich, Igor, Konovalenko, Alexander, Agapov, Vladimir, Gino Tuccari, Pupillo, Giuseppe, Montebugnoli, Stelio, Kharlamov, Gennadiy, Benner, Lance, Fateev, Viacheslav, Burtsev, Yuriy, Volvach, Alexander, Liu, Xiang, Oreshko, Vasiliy, Shmelds, Ivars, Bolli, Pietro, Dementiev, Alexander, Antipenko, Alexander, Dugin, Nikolay, Jazykov, Vladimir, and Bezrukov, Dmitriy

28. Sharing Low Frequency Radio Emissions in the Virtual Observatory: Application for JUNO-Ground-Radio Observations Support

Author

Cecconi, Baptiste, Savane, Renaud, Le Sidaner, Pierre, Hess, Sébastien L G, Erard, Stéphane, Zarka, Philippe, Lamy, Laurent, Coffre, Andrée, Denis, laurent, André, Nicolas, Génot, Vincent, Girard, Julien N G, Grießmeier, Jean-Mathias, Clarke, Tracy, Anderson, Marin, Ebert, Robert, Higgins, Charles, Sky, Jim, Thieman, James, Typinski, Dave, Hobara, Yasuhide, Imai, Kazumasa, Kurth, William S, Imai, Masafumi, Kasaba, Yasumasa, Kumamoto, Atsushi, Tsuchiya, Fuminori, Misawa, Hiroaki, Konovalenko, Alexander, Nakajo, Tomoyuki, Orton, Glenn S, and Ryabov, Vladimir

Subjects
13. Climate action, Jupiter, Radio Astronomy, Virtual Observatory
Abstract

In the frame of the preparation of the NASA/JUNO and ESA/JUICE (Jupiter Icy Moon Explorer)missions, and the development of a planetary sciences virtual observatory (VO), we are proposing anew set of tools directed to data providers as well as users, in order to ease data sharing anddiscovery. We will focus on ground based planetary radio observations (thus mainly Jupiter radioemissions), trying for instance to enhance the temporal coverage of jovian decametric emission. Thedata service we will be using is EPN-TAP, a planetary science data access protocol developed byEuroplanet-VESPA (Virtual European Solar and Planetary Access). This protocol is derived from IVOA(International Virtual Observatory Alliance) standards. Data from all major decametric radioinstruments will contribute: Nançay Decameter Array (France), LOFAR (France, Sweden, Poland),NenuFAR (France), URAN (Ukraine), LWA (USA), Iitate Radio Observatory (Japan), etc. Amateur radiodata from the RadioJOVE project is also available. The attached figure shows data from those threeproviders. We will first introduce the VO tools and concepts of interest for the planetaryradioastronomy community. We will then present the various data formats now used for such dataservices, as well as their associated metadata. We will finally show various prototypical toolsthat make use of this shared datasets. &nbsp

Catalog

Books, media, physical & digital resources
See catalog results