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19 results on '"Wattieaux, Gaëtan"'

1. Simulation and experimental characterization of a high power electron diode for linear induction accelerators

Author

Plewa, Jérémie-Marie, Maisonny, R., Eichwald, Olivier, Yousfi, Mohammed, Wattieaux, Gaëtan, Cartier, S., Cartier, F., Poulet, F., Bernigaud, V., Vermare, C., Ribiere, M., d'Almeida, T., Matériaux Multi-fonctionnels et Multi-échelles (CEMES-M3), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), VALDUC (DAM/VALDUC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), and Centre d'études scientifiques et techniques d'Aquitaine (CESTA)

Subjects
Particle Beam, [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, Accelerator Technologies
Abstract

International audience

Published
2017

2. Modeling and experimental characterization of the plasma produced by velvet cathode in a linear induction acceleratorg

Author

Plewa, Jérémie-Marie, Bernigaud, V., Cartier, F., Cartier, S., d'Almeida, T., Eichwald, Olivier, Maisonny, R., Poulet, F., Ribiere, M., Wattieaux, Gaëtan, Yousfi, Mohammed, Matériaux Multi-fonctionnels et Multi-échelles (CEMES-M3), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), VALDUC (DAM/VALDUC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Institut d'astrophysique spatiale (IAS), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES)

Subjects
[SPI.PLASMA]Engineering Sciences [physics]/Plasmas
Abstract

International audience

Published
2017

3. Electrostatic Potential Radiated by a Pulsating Charge in a Two-Electron Temperature Plasma

Author

Gilet, Nicolas, Henri, Pierre, Wattieaux, Gaëtan, Cilibrasi, Marco, Béghin, Christian, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Scuola Normale Superiore di Pisa (SNS), Enrico Fermi - Dipartimento di Fisica, University of Pisa - Università di Pisa, and ANR-15-CE31-0009,SPECTRA,Sonder le Plasma dans l'Environnement d'une ComètE avec RosettA(2015)

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Physics::Plasma Physics, Physics::Space Physics, [PHYS.PHYS.PHYS-SPACE-PH]Physics [physics]/Physics [physics]/Space Physics [physics.space-ph]
Abstract

International audience; Mutual impedance experiments have been developed to constrain the plasma bulk properties, such as density and temperature, of ionospheric and later space plasmas, through the electric coupling between an emitter and a receiver electric antennas. So far, the analytical modeling of such instruments has enabled to treat ionospheric plasmas, where charged particles are usually well characterized by Maxwellian electron distributions. With the growth of planetary exploration, mutual impedance experiments are or will be used to constrain space plasma bulk properties. Space plasmas are usually out of local thermodynamic equilibrium; therefore, new methods to calibrate and analyze mutual impedance experiments are now required in such non-Maxwellian plasmas. To this purpose, this work aims at modeling the electric potential generated in a two-electron temperature plasma by a pulsating point charge. A numerical method is developed for the computation of the electrostatic potential in a sum of Maxwellian plasmas. After validating the method, the results are used to build synthetic mutual impedance spectra and quantify the effect of a warm electron population on mutual impedance experiments, in order to illustrate how the method could be applied for recent and future planetary space missions, such as Rosetta, BepiColombo, and JUICE. In particular, we show how it enables to separate the densities and temperatures of two different electron populations using in situ measurements from the RPC-MIP mutual impedance experiment on board Rosetta.

Published
2017
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4. Localised plasma density enhancements around comet CG/67P

Author

Henri, Pierre, Broiles, T., Eriksson, A., Béghin, Christian, Lebreton, J.P., Vallieres, X., More, Jérome, Wattieaux, Gaëtan, Engelhardt, Ilka A.D., Edberg, N., Odelstad, Elias, Vigren, Erik, Glassmeier, Karl-Heinz, Goetz, Charlotte, Koenders, Christoph, Richter, Ingo, Volwerk, M., Burch, James L., Goldstein, Raymond, Mandt, Kathleen, Nilsson, Hans, Stenberg Wieser, G., Nemeth, Zoltán, Szegoe, K., Carr, Chris, Vallat, C., Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Space Science Division [San Antonio], Southwest Research Institute [San Antonio] (SwRI), Swedish Institute of Space Physics [Uppsala] (IRF), Technical University of Braunschweig, Institute of Geophysics and Meteorology, Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Wigner Research Centre for Physics [Budapest], Hungarian Academy of Sciences (MTA), Blackett Laboratory, Imperial College London, Rosetta Science Ground Segment (European Space Astronomy Centre), European Space Agency (ESA), and ROUCHON, Nathalie

Subjects
[SDU] Sciences of the Universe [physics], [SDU]Sciences of the Universe [physics]
Abstract

International audience; Comet 67P/Churyumov-Gerasimenko, target of the ESA’s Rosetta mission, reached its perihelion at 1.3 AU fromthe Sun in August 2015. Its plasma environment will go on being monitored by the Rosetta Plasma Consortium(RPC) as the distance to the sun increases, until end of mission in September 2016.Combining observations from the different RPC sensors, we investigate localised, strong enhancements of thecometary plasma density over short timescales (- minutes to seconds) observed during the period April 2015- January 2016. These strong plasma density variations (RPC-MIP and RPC-LAP) are likely associated to coldelectrons (RPC-IES) and generally observed during magnetic field rotations (RPC-MAG). The location of suchevents, both in the rotating comet frame and with regard to the magnetic field direction, is discussed to betterconstrain the mechanism at the origin of these localised plasma density enhancements

Published
2016

5. Plasma-induced germination of Arabidopsis thaliana seeds using 3 low temperature plasma setups

Author

Yousfi, Mohammed, Jemmat, A., Dunand, C., Sarrette, Jean-Philippe, Wattieaux, Gaëtan, Merbahi, Nofel, Eichwald, Olivier, Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Biologie du Cancer et de l'Infection (BCI ), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-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), Department Obstetrics and Gynaecology, Grenoble Hospital, Grenoble, France, and Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
[SPI.PLASMA]Engineering Sciences [physics]/Plasmas
Abstract

International audience

Published
2016

6. Plasma-induced germination of Arabidopsis thaliana using 3 low temperature plasma devices

Author

Jemmat, A. M., Dunand, C., Yousfi, Mohammed, Sarrette, Jean-Philippe, Wattieaux, Gaëtan, Merbahi, Nofel, Eichwald, Olivier, Biologie du Cancer et de l'Infection (BCI ), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-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), Department Obstetrics and Gynaecology, Grenoble Hospital, Grenoble, France, Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)

Subjects
[SPI.PLASMA]Engineering Sciences [physics]/Plasmas
Abstract

International audience

Published
2016

7. Mapping of the cometary plasma density around comet CG/67P at perihelion

Author

Henri, Pierre, Eriksson, Anders, Edberg, Niklas, Béghin, Christian, Décréau, Pierrette, Grard, Réjean, Hamelin, Michel, Johansson, Erik, Lebreton, Jean-Pierre, Mazelle, Christian, Odelstad, Elias, Randriamboarison, Orélien, Schmidt, Walter, Wattieaux, Gaëtan, Winterhalter, Daniel, Vallières, Xavier, Vigren, Erik, Glassmeier, Karl-Heinz, Goetz, Charlotte, Koenders, Christoph, Richter, Ingo, Volwerk, Martin, Burch, James, Broiles, Thomas, Golstein, Ray, Mandt, Kathleen, Mokashi, Prachet, Nilsson, Hans, Sternberg Wieser, Gabriella, Carr, Chris, Cupido, Emanuele, Galand, Marina, Matteini, Lorenzo, Nemeth, Zoltan, Szego, Karoly, Vallat, C., Schwartz, Steven, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Swedish Institute of Space Physics [Uppsala] (IRF), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre d'étude spatiale des rayonnements (CESR), 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)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Finnish Meteorological Institute (FMI), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Austrian Academy of Sciences (OeAW), Southwest Research Institute [San Antonio] (SwRI), Blackett Laboratory, Imperial College London, Wigner Research Centre for Physics [Budapest], Hungarian Academy of Sciences (MTA), European Space Astronomy Centre (ESAC), European Space Agency (ESA), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), 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 de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), NASA-California Institute of Technology (CALTECH), and Agence Spatiale Européenne = European Space Agency (ESA)

Subjects
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; In August 2015, comet 67P/Churyumov-Gerasimenko, target of the ESA’s Rosetta mission, reached its perihelion at 1.3 AU from the Sun. The Rosetta Plasma Consortium (RPC) onboard the Rosetta spacecraft offers a unique opportunity to analyze the plasma environment during this period. Combining observations from the Mutual Impedance probe (RPC-MIP) and the Langmuir probes (RPC-LAP), we estimate the cometary plasma density. We will present its spatial distribution around the comet when close to perihelion. Combined Mutual impedance and Langmuir probes density measurements are also compared to the density derived from particle measurements (RPC-ICA and RPC-IES). In addition, we will focus on localised, strong variations of the cometary plasma density over short timescales (~ minutes to seconds) observed during this period. These strong plasma density enhancements are interpreted taken into account the electron energy spectrum measured by the Ion and Electron Spectrometer (RPC-IES). Possible correlations of these plasma enhancements with variations in the magnetic field direction measured from the Magnetometer (RPC-MAG) will be discussed.

Published
2015

8. Mutual Impedance Probes on board Rosetta, Bepi-Colombo and JUICE

Author

Henri, Pierre, Lebreton, Jean-Pierre, Rauch, Jean-Louis, Béghin, Christian, Décréau, Pierrette, Eriksson, Anders, Grard, Réjean, Hamelin, Michel, Mazelle, Christian, Randriamboarison, Orélien, Schmidt, Walter, Trotignon, Jean-Gabriel, Wattieaux, Gaëtan, Winterhalter, Daniel, Aouad, Youcef, Colin, Fabrice, Lagoutte, Dominique, Duff, Olivier Le, Vallières, Xavier, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Swedish Institute of Space Physics [Uppsala] (IRF), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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), Finnish Meteorological Institute (FMI), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Laboratoire de physique et chimie de l'environnement (LPCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Agence Spatiale Européenne = European Space Agency (ESA), 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 de Toulouse (UT), NASA-California Institute of Technology (CALTECH), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3)

Subjects
Plasma, Mutual Impedance Probe, [SDU]Sciences of the Universe [physics], BepiColombo, Rosetta, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Instrument, radio frequency probe, JUICE, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; The mutual impedance probe is an active radio frequency probe, designed to measure in situ the bulk plasma properties. An ideal configuration consists of both a transmitting and a receiving dipole, whose baseline is at least a few Debye Lengths. Due to various accommodation constraints on the spacecraft, the transmitter may only be a monopole. In that case, the image of the transmitter charge is distributed over the whole spacecraft surface. The operating principle consists in injecting a frequency-variable current through the transmitter, in a frequency range that encompasses the plasma frequency (or upper hybrid frequency in a magnetised plasma), and measuring the induced voltage at the receiver. Assuming a transmitted current I(f) of constant amplitude that induces a potential difference V(f) at the receiver dipole, the mutual impedance probe provides the coupling complex impedance Z(f) = V(f)/I(f) between the transmitter and the receiver as a function of frequency. The impedance depends on the plasma properties, in particular the bulk density and temperature (in case of a Maxwellian distribution) of the electron population. The measurement principle is illustrated with in situ observations from the Mutual Impedance Probe (RPC-MIP), one of the five sensors of the Rosetta Plasma Consortium (RPC) on the ESA Rosetta mission. RPC-MIP has been providing regular measurements of the comet plasma environment since early August 2014 when Rosetta was within 100 km from the nucleus of its target comet 67P/Churyumov-Gerasimenko. RPC-MIP operates in the frequency range from 7 kHz to 3.5 MHz that allows covering the plasma density range expected during the mission from solar wind to deep coma densities. RPC-MIP operates in two geometrical configurations. In the baseline configuration, the transmitter and receiver dipoles are aligned on a 1m-beam. The transmitter-receiver distance, of the order of 50 cm, allows probing plasmas with Debye lengths up to 20-25 cm. For longer Debye lengths, MIP uses as the transmitter, one of the two Langmuir Probes of the RPC-LAP instrument located at about 4 m from the MIP receiving dipole, which allows probing plasma with Debye lengths up to about 2 m. Based on the same principle the Permittivity Probe (SESAME-PP), attached to the Rosetta Lander Philae, measures the electrical properties of the cometary surface material in the frequency range 20 Hz to 10 kHz. Regarding future space missions, AM2P (Active Measurement of Mercury's Plasma) is the mutual impedance experiment of the PWI (Plasma Wave Investigation) consortium, on board the MMO spacecraft of the Bepi-Colombo ESA-JAXA mission scheduled for a mid-2016 launch and arrival at Mercury in 2024. MIME (Mutual Impedance MEasurements) is the mutual impedance experiment of the RPWI (Radio and Plasma Waves Investigation) on board the ESA mission JUICE, scheduled for launch in 2022 and arrival at Jupiter in 2030.

Published
2015

9. Findings and questions from ten years of analysis of the PWA-HASI data collected onboard the HUYGENS probe in the atmosphere and on the surface of Titan

Author

Hamelin, Michel, Lethuillier, Anthony, Le Gall, Alice, Grard, R., Ciarletti, Valérie, Béghin, Christian, Schwingenschuh, Konrad, Lorenz, R.D., López-Moreno, J.J., Jernej, I., Brown, V., Ferri, F., Godard, R., Wattieaux, Gaëtan, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Johns Hopkins University (JHU), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Universita degli Studi di Padova, Department of Mathematics and Computer Science [Kingston], Royal Military College of Canada, Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Università degli Studi di Padova = University of Padua (Unipd), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)

Subjects
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

10. Effects of three low temperature plasmas on early events of Arabidopsis thaliana germination

Author

Jemmat, A. M., Dunand, C., Yousfi, Mohammed, Sarrette, Jean-Philippe, Wattieaux, Gaëtan, Merbahi, Nofel, Judée, Florian, Biologie du Cancer et de l'Infection (BCI ), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-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), Department Obstetrics and Gynaecology, Grenoble Hospital, Grenoble, France, Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Département Technologie des Polymères et Composites & Ingénierie Mécanique (TPCIM), École des Mines de Douai (Mines Douai EMD), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Ministère de l'Économie, des Finances et de l'Industrie [Paris, France], Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)

Subjects
[SPI.PLASMA]Engineering Sciences [physics]/Plasmas
Abstract

International audience

Published
2015

11. First Rosetta Observations of the Cometary Plasma at Churyumov–Gerasimenko with the Mutual Impedance Probe (RPC-MIP)

Author

Henri, Pierre, Lebreton, Jean-Pierre, Béghin, Christian, Décréau, Pierrette, Eriksson, Anders, Geiswiller, Johann, Grard, Rejean, Hamelin, Michel, Mazelle, Christian, Randriamboarison, Orélien, Schmidt, Walter, Trotignon, Jean-Gabriel, Wattieaux, Gaëtan, Winterhalter, Daniel, Aouad, Youcef, Lagoutte, Dominique, Vallières, Xavier, Carr, Chris, Cupido, Emanuele, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National d’Études Spatiales [Paris] (CNES), Swedish Institute of Space Physics [Uppsala] (IRF), Direction générale de l'Armement (DGA), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Finnish Meteorological Institute (FMI), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Blackett Laboratory, Imperial College London, 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 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 Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), PLANETO - LATMOS, Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), 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), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Agence Spatiale Européenne = European Space Agency (ESA), 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 de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), and NASA-California Institute of Technology (CALTECH)

Subjects
Physics::Space Physics, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Astrophysics::Earth and Planetary Astrophysics
Abstract

International audience; The ROSETTA spacecraft arrived in the vicinity of the comet in early August. As part of the Rosetta Plasma Consortium (RPC), the Mutual Impedance Probe (RPC-MIP) is designed to measure the bulk plasma properties in the comet environment. MIP is an active RF probe. It consists of two transmitters, which can operate separately as a monopole or coupled as a transmitting dipole, and a receiving dipole. The operating range of MIP is 7 kHz to 3.5 MHz that allows covering the plasma density range expected during the mission from solar wind to deep coma densities. The baseline distance between the transmitter and the receiver is 40-60 cm, which allows probing plasmas with Debye lengths up to 20-25 cm. For longer Debye lengths, MIP uses one of the two Langmuir Probes of the RPC-LAP instrument located at about 4 m from the MIP receiving dipole, which allows probing plasma with Debye lengths up to about 2 m. The MIP receiving dipole (baseline 1 m) can also be used in a passive mode to measure the electrical activity in the comet environment in the same frequency range. In the active mode, MIP measures the coupling complex impedance between the transmitting monopole (or dipole) and the receiving dipole. To model the frequency response of MIP, a surface charge distribution method is used that takes into account the charge distribution induced on the spacecraft structures by the transmitter. The spacecraft surface is approximated by discrete elements smaller in size than the plasma Debye length. In our model, it is assumed that each spacecraft elementary surface carries a uniform charge distribution. The electric field measured by the receiver is the sum of the contributions from the transmitter itself and of all the elementary surfaces that represent the spacecraft. The frequency of the transmitted current is varied in frequency steps. Assuming a transmitted current I(f) of constant amplitude, the potential difference V(f) between the two receivers provides the mutual impedance Z(f)=V(f)/I(f) of the instrument as a function of frequency. The first observations in active mode, as well as the background electric wave activity in the vicinity of the comet 67P/Churyumov-Gerasimenko are presented. Preliminary inferred plasma parameters, such as bulk electron density and temperature, are derived by using the model for the MIP frequency response.

Published
2014

13. Capacitively coupled radio-frequency discharges in nitrogen at low pressure

Author

Alves, L. L., Marques, L., Pintassilgo, C. D., Wattieaux, Gaëtan, Es-Sebbar, Et-Touhami, Berndt, J., Carrasco, Nathalie, Boufendi, L., Cernogora, Guy, Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Departamento de Fisica - Faculdade de Engenharia, Universidade do Porto, Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Universidade do Porto = University of Porto, Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Universidade do Minho, and Cardon, Catherine

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], ComputingMethodologies_GENERAL
Abstract

Apresentação em poster, This paper studies ccrf discharges (at f=13.56 MHz frequency) in pure nitrogen, produced within cylindrical parallel-plate reactors similar to GEC reference cells [1] (associated with the GREMI and the LATMOS setups, the latter corresponding to the PAMPRE experiment [2]), at 100-300 V applied voltages and 0.1-1 mbar pressures. Under these conditions, the neutral gas is found close to room temperature (~350 K) [3]. The discharges are studied using both experiments and simulations. Experiments include the measurement of the following quantities: (i) the applied voltage, using a high-voltage probe; (ii) the self-bias voltage; (iii) the effective power coupled to the plasma, taking into account circuit losses; (iv) the average electron density, using a resonant-cavity technique; (v) the intensities of radiative transitions with the nitrogen second-positive system and first-negative system, and with the 881.5 nm atomic line of argon, using optical emission spectroscopy diagnostics. The comparison between model results and measurements shows the influence in results of the nitrogen kinetics, particularly via the interaction of species with the reactor walls. Simulations use an hybrid code that couples a 2D time-dependent fluid module [4], describing the dynamics of charged particles (electrons and positive ions N2+ and N4+), and a homogeneous (0D) kinetic module, describing the production and destruction of nitrogen (atomic and molecular) neutral species. The coupling between these modules adopts the local mean energy approximation [4] to define space-time dependent electron parameters for the fluid module and to work-out space-time average rates for the kinetic module. Model results yield the self-consistent dc-bias voltage, the effective power coupled to the plasma, and the 2D spatial distributions for (i) the densities and fluxes with the charged particles and the electron mean energy, (ii) the densities of the most relevant nitrogen species, and (iii) the rf plasma potential., PICS Cooperation Program, financed by the Portuguese Foundation for Science and Technology and the Centre National de la Recherche Scientifique.

Published
2011

14. Characterization of a low pressure capacitively coupled RF discharge in N2-H2

Author

Wattieaux, Gaëtan, Berndt, Johannes, Kovacevic, Eva, Mikikian, Maxime, Boufendi, Laifa, Carrasco, Nathalie, Cernogora, Guy, Gouveia, André, Pintassilgo, C.D., Marques, L., Alves, L.L., Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Departamento de Fisica - Faculdade de Engenharia, Universidade do Porto = University of Porto, Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Centro de Física da Universidade do Minho (CFUM), Universidade do Minho = University of Minho [Braga], PICS cooperation program (FCT-CNRS) between Portugal and France., Mikikian, Maxime, Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Universidade do Porto, and Universidade do Minho

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, [SPI.PLASMA] Engineering Sciences [physics]/Plasmas
Abstract

Discharges operated in mixtures of hydrogen and nitrogen are nowadays used as a source of active species for various kinds of applications from etching of low-k materials to modifications of polymer surfaces for biomedical applications. Moreover these kinds of discharges can provide information relevant for studies of planetary atmospheres. The present work involves the study of a low pressure capacitively coupled RF discharge operated in variable mixtures of N2 and H2 at variable pressures and powers. The systematic measurements of electron density, RF voltage, self bias and the observation of several molecular bands by means of optical emission spectroscopy gave us important information about basic processes relevant for the understanding and application of such kind of discharges. The experimental results are interpreted by means of a hybrid model, namely the effect of admixing hydrogen into a N2 discharge.

Published
2010

15. Characterisation of a nitrogen CCP at low pressure

Author

Pintassilgo, C. D., Wattieaux, Gaëtan, Gouveia, A., Marques, L., Carrasco, Nathalie, Alves, L. L., Boufendi, L., Cernogora, Guy, Departamento de Fisica - Faculdade de Engenharia, Universidade do Porto, Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Centro de Física da Universidade do Minho (CFUM), Universidade do Minho, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Universidade do Porto = University of Porto, Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Universidade do Minho = University of Minho [Braga], and Cardon, Catherine

Subjects
[PHYS.ASTR.EP] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract

P2-56; The present work is part of an endeavour to perform laboratory simulations of the chemistry of Titan, satellite of Saturn. In the atmosphere of Titan, composed of N2 and CH4, solid particles are produced by photochemistry and charged particles from Saturn's magnetosphere. We mimic this chemistry using a low-pressure capacitively coupled plasma (CCP), produced in a gas mixture representative of Titan's atmosphere. The production of solid particles in these discharges has already been observed, together with the delay in their formation and their effect upon the electron density. Here, we present a first contribution to this global task, by characterizing pure nitrogen CCPs (with a simpler chemistry) RF discharges. The study involves both modelling and diagnostics of the discharge plasma, aiming to compare simulations and measurements.

Published
2010

16. Capacitively coupled radio-frequency discharges in nitrogen at low-pressure

Author

Alves, L. L., Marques, L., Pintassilgo, C. D., Wattieaux, Gaëtan, Berndt, J., Boufendi, L., Cernogora, Guy, Cardon, Catherine, Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
Abstract

CTP.00151; This paper uses simulations and measurements to study capacitively coupled rf discharges (13.56 MHz) in pure nitrogen, produced within a cylindrical parallel-plate reactor, at 0.2-2 mbar pressures and 20-30 W coupled powers. The reactor is similar to a GEC reference cell surrounded by a lateral grounded grid. Simulations use an hybrid code that couples a 2D (r,z) time-dependent fluid module, describing the dynamics of charged particles, and a 0D kinetic module, describing the production and destruction of nitrogen (atomic and molecular) neutral species. The coupling between these modules adopts the local mean energy approximation to define space-time dependent electron parameters for the fluid code and to work-out space-time average rates for the kinetic code. Model results are compared to measurements of the self-bias potential, the effective rf power (accounting for circuit losses), the average electron density (obtained by resonant-cavity measurements), and the intensities of radiative transitions with the nitrogen SPS and with atomic lines emitted by argon traces (obtained by OES diagnostics).

Published
2010

17. Particle growth and detection in low temperature plasmas

Author

Boufendi, Laifa, Dupuis, Catherine, Wattieaux, Gaëtan, Tessier, Yves, Mikikian, Maxime, Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), and Mikikian, Maxime

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, [SPI.PLASMA] Engineering Sciences [physics]/Plasmas, 52.27.Lw
Abstract

International audience; Dust particle nucleation and growth has been widely studied these last 15 years in different chemistries and experimental conditions. This phenomenon is correlated with various electrical changes at electrodes, including self-bias voltage and amplitudes of the various harmonics of current and voltage. Some of these changes, such as the appearance of more resistive plasma impedance, are correctly attributed to loss of electrons in the bulk plasma to form negative molecular ions and more precisely charged nanoparticles. These changes were studied and correlated to the different phases on the dust particle formation. It is well known now that, in silane argon gas mixture discharges, in the first step of this particle formation we have formation of nanometer sized crystallites. These small entities accumulate and when their number density reaches a critical value, they start to aggregate to form bigger particles. The different phases are well defined and determined thanks to the time evolution of the different electrical parameter changes. The purpose of this contribution is to compare different chemistries to highlight similarities and/or differences in order to establish possible universal dust particle growth mechanisms. The chemistries we studied concern SiH4-Ar, CH4, CH4-N2 and Sn(CH3)4. We also refer to works performed in other laboratories in different discharge configurations.

Published
2008

18. Study of hydrocarbon dust particle formation in Ar-CH4 radiofrequency low pressure discharge

Author

Mezeghrane, Abdelaziz, Couëdel, Lénaïc, Wattieaux, Gaëtan, Mikikian, Maxime, Lamrous, Omar, Tessier, Yves, Boufendi, Laïfa, Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Paweł Gąsior and Jerzy Wołowski, and Mikikian, Maxime

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, [SPI.PLASMA] Engineering Sciences [physics]/Plasmas, 52.27.Lw
Abstract

International audience; The aim of this paper is to contribute to improve the knowledge concerning the growth steps of hydrocarbon dust particles in Ar-CH4 plasma. To achieve this aim, we monitored the plasma impedance modification, due to the particle formation, by measuring the time-evolution of the self bias voltage, the current third harmonic and the electron density. Emission Spectroscopy turns out to be a good tool for estimating the electron temperature. While, Transmission and Scanning Electron Microscopy are used to characterize the morphology and the size of collected powders.

Published
2007

19. Dust particle synthesis in N2-CH4 gas mixture capacitively coupled radiofrequency discharge

Author

Mezeghrane, Abdelaziz, Couëdel, Lénaïc, Wattieaux, Gaëtan, Mikikian, Maxime, Lamrous, Omar, Tessier, Yves, Boufendi, Laïfa, Mikikian, Maxime, Paweł Gąsior and Jerzy Wołowski, Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), and Université Mouloud Mammeri [Tizi Ouzou] (UMMTO)

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, [SPI.PLASMA] Engineering Sciences [physics]/Plasmas, 52.27.Lw
Abstract

International audience; This paper deals with the study of the growth kinetics of hydrocarbon dust particles in low pressure N2-CH4 gas mixture radio frequency discharges. The partial pressure of CH4 is about 2% of the gas mixture total pressure (0.9 mbar), and the power varies from 20 to 40 W. The initiation and growth of hydrocarbon particles are followed thanks to the measurement of the self bias voltage, the amplitude of the third harmonic of the discharge current, the electron density and the electron temperature. The microwave resonant cavity technique is used to measure the time evolution of the electron density, while the morphology and the size of the collected powders are studied by the means of Transmission and Scanning Electron Microscopy.

Published
2007

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