Publications

2017

• Magnetic field fluctuations measurement onboard ESA/JUICE mission by search-coil magnetometer: SCM instrument as a part of RPWI consortium
  
  • Retinò Alessandro
  • Chust Thomas
  • Mansour Malik
  • Canu Patrick
  • Sahraoui Fouad
  • Le Contel Olivier
  • Alison Dominique
  • Sou Gérard
  • Varizat Laurent
  • Techer Jean-Denis
  • Jeandet A.
  • Geyskens N.
  • Chariet M.
  • Cecconi B.
  • Bergman J.
  • Wahlund J. E.
  • Santolík O.
  • Soucek J.
  • Dougherty M.
  , 2017, pp.EPSC2017-510. The JUpiter ICy moons Explorer (JUICE) mission is planned for launch in 2022 with arrival at Jupiter in 2029 and will spend at least three years making detailed observations of Jupiter's system. The Radio and Plasma Wave Investigation (RPWI) consortium will carry the most advanced set of electric and magnetic fields sensors ever flown therein, which will allow to characterize the plasma wave environment and the radio emission of Jupiter and its icy moons in great detail. The Search Coil Magnetometer (SCM) will provide high-quality measurements of the magnetic field fluctuations' vector for RPWI. Here we present the technical features of the SCM instrument and we discuss its scientific objectives.
• Compressible MHD turbulence in the Earth's magnetosheath: estimation of the energy cascade rate using in-situ spacecraft data
  
  • Hadid Lina
  • Sahraoui Fouad
  • Galtier Sébastien
  • Huang S. Y.
  , 2017, 11, pp.EPSC2017-759. we give the first estimation of the energy heating rate in the Earth's magnetosheath using THEMIS and CLUSTER spacecraft data.
• Experimental simulation of aerosols evolution in Titan’s ionosphere
  
  • Chatain Audrey
  • Carrasco Nathalie
  • Guaitella Olivier
  , 2017, 11, pp.EPSC2017-594. Many recent studies on Titan are concerned with aerosols. In particular, questions are asked on how these complex organic molecules are formed and evolve in Titan’s atmosphere. Here for the first time we experimentally study how harsh plasma environment simulating Titan ionosphere can affect these aerosols. Titan tholins are placed in a N2-H2 plasma reactor and sample signatures are measured by infrared transmission spectroscopy. First results show an evolution of the absorption bands. Therefore, plasma conditions seem to change tholin chemical structure.
• Modelling of an electric contact under lightning current
  
  • Layly Jean-Baptiste
  • Tholin Fabien
  • Bourdon Anne
  , 2017. Lightning stroke on aircrafts induce high current levels in aeronautic assemblies which electrical resistance is mainly concentrated in the contact interfaces between the different parts. As a consequence, the maximum Joule effects, electric fields, and hence sparking probabilities take place in the electric contacts of the aeronautic assemblies [1]. Being able to predict the behaviour of electric contacts under high current levels is then necessary to provide a better understanding on sparking and out-gassing phenomena induced by lightning stroke on aeronautic structures. The present work addresses the modelling at the microscopic scale of such electric contacts under high current levels, through a simplified geometric and physical description. 2D axisymmetric and 3D finite volume simulations are used to study simplified contact geometries and examine the current distribution dynamics, temperature increase, and phase transitions. Finally, a simple pseudo-analytical model is proposed that enables parametric studies on more complex and realistic electric contacts.
• Optimization of Compact Hohlraum Design to ICF Studies
  
  • Kantsyrev V. I.
  • Chuvatin Alexandre S.
  • Shlyaptseva V. V.
  • Safronova Alla S.
  • Shrestha Ishor
  • Golovkin I. E.
  • Stafford A.
  • Butcher C.
  • Schultz K. A.
  , 2017. Proposed optimization of a compact hohlraum design with parallel-driven Z-pinch x-ray sources is discussed. This design was jointly proposed earlier by SNL and UNR [1] and was experimentally demonstrated in full configuration at the 1.7 MA UNR Zebra generator [2]. A parallel driven multiple Z-pinch sources scheme was a significant advance in terms of driver requirements compared to a traditional double-ended cylindrical pinch scheme. Considering only geometric arguments from [1], it became evident that the new scheme could be more efficient by a factor of ~ 4.5 in terms of energy requirements. The prospective results of compact hohlraum scheme optimization are described: improvement of geometry of a compact hohlraum with parallel driven multiple Z-pinches sources; application of Au wires (Za = 79) instead of traditionally used W (Za = 74) wires; and employment of double planar foils liner (DPFL) instead of DPWA in hohlraums x-ray sources. This work was supported by NNSA under DOE grant DE-NA0003047. References [1] B. Jones et al., Physical Review Letters 104, 125001 (2010) [2] V.L. Kantsyrev et al., Physical Review E 90, 063101 (2014) ORAL CONTRIBUTION
• Production, acceleration and extraction of ions (negative/positive) from high-power laser induced plasma
  
  • Perrakis K.
  • Moustaizis S. D.
  • Lalousis P.
  • Ducret J.-E.
  • Auvray Philippe
  • Larour Jean
  • Balcou Philippe
  , 2017. A novel scheme and methodology for the production, acceleration and extraction of ions, both negative and positive, for a broad spectrum of applications is investigated. The production of the plasma, from which the ions are extracted, is based on ultra-short high intensity laser beam interaction with clusters. The non-linear propagation and filamentation effects during the propagation of the ultra-short laser pulse in the clusters improve the volume ion production [1]. The selection of negative or positive ions extraction from the plasma is based on the magnetic insulation principle, where a strong external magnetic field is coupled to an accelerating electric field in a diode-like configuration [2]. The main advantages of the proposed ion source are (a) the high density of the produced ion beam and (b) the relatively small volume of production. A multi-fluid code in cylindrical geometry describes the spatio-temporal evolution of plasma species in the magnetically insulated diode configuration [3]. The code is also used to calculate the evolution of the state parameters of the plasma produced from filamentation [1]. These results enable us to investigate an improved configuration for plasma generation based on filamentation effects in (i) compact magnetic fusion devices and (ii) important applications of negative ion beams for plasma heating. The new high energy, high average power, high efficiency ICAN fiber laser [4] is a good candidate for both the plasma generation and the photoneutralization of negative ions beam. [1] Moustaizis, S. D., Auvray, P., Hora, H., Lalousis, P., Larour, J., and Mourou, G. "Photofusion reactions in a new compact device for ELI". In K. Osvay, P. Dombi, J. A. Fulop, and K. Varju (Eds.), AIP Conference Proceedings (Vol. 1462, No. 1, pp. 191-194), 2012. [2] Moustaizis, S. D., Lalousis, P., and Perrakis, K. "On the Production, Acceleration and Photo-Neutralization of High Energy and High Current Negative Ions Beam for Magnetic Fusion Applications". Paper contribution to the 39th EPS Conference and 16th Int. Congress on Plasma Physics, P1.026, Stockholm, 2012. [3] Moustaizis, S. D., Lalousis, P., Perrakis, K., Ducret, J. E., Larour, J., and Auvray, P. "Investigations on High Power Neutral Beam Production for Tokamak Applications.", Paper contribution to the 40th EPS Conference on Plasma Physics, P1.139, Espoo 2013. [4] Moustaizis, S. D., Lalousis, P., Perrakis, K., Auvray, P., Larour, J., Ducret, J. E., and Balcou, P. "ICAN: High power neutral beam generation". The European Physical Journal Special Topics, 224(13), 2639-2643, (2015).
• Radio and plasma wave observations during Cassini's Grand Finale
  
  • Kurth W. S.
  • Canu Patrick
  • Cecconi B.
  • Farrell W. M.
  • Fischer G.
  • Galopeau Patrick H. M.
  • Gurnett D. A.
  • Hospodarsky G. B.
  • Lamy L.
  • Lecacheux A.
  • Louarn P.
  • Macdowall R. J.
  • Menietti J. D.
  • Morooka M.
  • Pedersen A.
  • Persoon A. M.
  • Sulaiman A.
  • Wahlund J.-E.
  • Zarka P.
  , 2017. Cassini has commenced its high inclination Grand Finale orbits with perikrones falling between the inner edge of the D ring and the upper limits of Saturn's atmosphere. The Cassini Radio and Plasma Wave Science (RPWS) instrument makes a variety of observations in these unique orbits including Saturn kilometric radiation, plasma waves such as auroral hiss associated with Saturn's auroras, dust via impacts with Cassini, and the upper reaches of Saturn's ionosphere. This paper will provide an overview of the RPWS results from this new and final phase of the Cassini mission with the unique opportunities afforded by the orbit.
• Fusion par Confinement Magnétique : du Rêve Prométhéen aux Défis d'Iter
  
  • Morel Pierre
  , 2017.
• The Radio & Plasmas Waves instrument on the Solar Orbiter mission : science objectives and capabilities
  
  • Maksimovic M.
  • Bale S. D.
  • Chust Thomas
  • Krasnosselskikh Vladimir
  • Soucek J.
  • Steller M.
  • Stverak Stepan
  • Vaivads A.
  , 2017, 48, pp.110.05. We will review the science objectives of the Radio & Plasmas Waves (RPW) instrument on the Solar Orbiter mission. Among those the study of the connectivity between the solar corona and the inner Heliosphere as close as from 0.3 AU and the kinetic behavior of the Solar Wind are of prime importance. We present then the RPW technical capabilities which will allow in-situ and remote sensing measurements of both electrostatic and electromagnetic fields and waves in a broad frequency range, typically from a fraction of Hertz to a few tens of MHz.
• CLUSTER AND MMS MISSIONS: OPTIMAL ESTIMATION OF THE GRADIENT OF A FIELD
  
  • Chanteur Gérard
  , 2017.
• Linear discriminant based prey-predator analysis of hot electron effects on the X-pinch produced K-shell Al plasmas
  
  • Yilmaz M. F.
  • Danisman Y.
  • Larour Jean
  • Arantchouk Léonid
  , 2017. Linear Discriminant Analysis (LDA) is applied to investigate the electron beam effects on the X-pinch produced K-shell Aluminum spectra. The radiating plasma is produced by the explosion of two 25-μm Al wires (XP622) on a compact L-C (40kV, 200kA and 200ns) generator and was analyzed using the full set of diagnostics: current signals by close-to-load B-dot probing, fast filtered PCDs, time-integrated x-ray pinhole imaging and time-integrated crystal spectrometry in the keV region. The electron temperature and density, and the hot electron beam fraction in the Al plasma, were extracted using coefficients of linear discriminant components derived from the non-LTE collisionally radiative K-shell Al model and compared with the ones obtained by principal component analysis method [1]. As a result, LDA can also be used for plasma diagnostics and can investigate the electron beam effects on the synthetic spectra, especially in the details of intercombination and dielectronic satellite lines of weak transitions. Linear discriminant vector spectra analysis shows that the weak transitions of Al He Ly and He to move in Langmuir wave type oscillations. A 3-D representation of linear discriminant analysis shows that the addition of a fraction of electrons in an energetic beam, reflects the quantized clusters as well as outward spiral turbulence. These spirals are modeled with logistic growth with predator called Predator-prey model. This modeling suggests that the electron beams and ions represent the preys and predator, respectively. The center region of the spirals has low temperatures (50-100 eV) but more stability in which the low ionization is fixed by the electron beams. Also not only LD [2] but also LD [3] coefficients obtained from LDA are used to estimate the temperature of a given test plasma which makes a significant improvement compare to due to the less information loss. The modeled plasma electron temperatures and densities are about Te = 75 eV and ne = 1x1019 cm-3 in the presence of electron beams with fraction of f = 0.2 and energy centered at 10 keV. oral presentation
• The need for training integrating knowledge from the Sun to the Earth
  
  • Amory-Mazaudier Christine
  , 2017. The International Heliophysical Year (IHY) project brought together researchers from different disciplines from the sun to the earth. This project allowed a better understanding of recent advances in sun physics and showed the need for ionosphere physicists to integrate new knowledge of the sun in their studies. This has become essential in the new field of space weather: it is clear that the solar source must be identified in order to predict its effects on technologies like GNSS. In this presentation we will show how only certain events have been selected by the physicists of the ionosphere and the limitations that these choices have imposed in the development of the research of the ionosphere. It thus seems important in the new training of the students to envisage in the university curricula to integrate the knowledge from the Sun to the Earth.
• Microwave discharge igniter for combustion applications: discharge development and energy distribution in time and space
  
  • Shcherbanev S.A.
  • de Martino A.
  • Khomenko A.Yu.
  • Starikovskaia Svetlana
  • Padala S.
  • Ikeda Yuji
  , 2017.
• Kinetics of metastable states and atoms in DC discharges in pure O<SUB>2</SUB>: An experimental study
  
  • Booth Jean-Paul
  • Chatterjee Abhyuday
  • Guaitella Olivier
  • de Oliveira N.
  • Nahon L.
  • Western Colin
  • Zyryanov Sergey
  • Lopaev Dmitry
  , 2017.
• Single and multiple pin(s)-to-liquid discharges: connecting self-organization patterns and ROS production in liquids for plasma agronomy applications
  
  • Zhang S
  • Rousseau Antoine
  • Dufour Thierry
  , 2017. Pin-to-liquid discharges are investigated for the activation of liquids dedicated to agriculture applications. They are characterized through their electrical and optical properties, with a particular attention paid to their filaments and self-organized patterns occurring at the liquid interface. We show how modulating their interaction with ambient air can promote the production of reactive species in liquids such as H 2 O 2 , NO 2 ¯ and NO 3 ¯. The effects of the resulting plasma activated media are reported on lentils seeds.
• Relaxation of electronic degrees of freedom in molecular nitrogen excited by a nanosecond capillary discharge
  
  • Lepikhin N D
  • Popov N A
  • Starikovskaia Svetlana
  , 2017.
• Species-dependent thermal energy accommodation in low-pressure plasmas
  
  • Gibson Andrew
  • Gans T.
  • Kushner M.J.
  • Booth Jean-Paul
  , 2017.
• Reactive species involved in higher seeds germination and shoots vigor through direct plasma exposure and plasma-activated liquids
  
  • Dufour Thierry
  • Zhang S
  • Simon S
  • Rousseau Antoine
  , 2017. Cold atmospheric plasma treatments have been applied on lenses seeds and shoots to improve their germination and vigor rates. Two approaches have been considered: direct plasma exposure and plasma activation of liquids (tap water, demineralized water and liquid fertilizer). A special focus has been drawn on reactive oxygen species generated in the plasma phase but also in plasma activated media to understand their impact on germination process as well as on plants growth.
• Measuring vibrational excitation of CO<SUB>2</SUB> in a pulsed glow discharge
  
  • Klarenaar Bart
  • Engeln Richard
  • Damen Mark
  • Sanden M C M van De
  • Morillo-Candas Ana-Sofia
  • Auvray Philippe
  • Guaitella Olivier
  , 2017.
• On filamentary nanosecond surface dielectric barrier discharge for flame initiation
  
  • Shcherbanev S.A.
  • Williams J.
  • Popov N A
  • Starikovskaia Svetlana
  , 2017.
• Nanosecond discharges at high specific energy release
  
  • Starikovskaia Svetlana
  , 2017.
• Plasma in contact with liquids: physics and chemistry issues and applications to biology and agriculture
  
  • Rousseau Antoine
  , 2017.
• Study of fine structures of streamer with hydrodynamics in nanosecond surface dielectric barrier discharges
  
  • Zhu Yifei
  • Shcherbanev S.A.
  • Starikovskaia Svetlana
  , 2017.
• Implications Of The Magnetic Structure Of Magnetic Clouds For Their Interaction With The Terrestrial Bow Shock And The Magnetopause, IAU Symposium 335: space weather of the heliosphere: processes and forecasts
  
  • Fontaine Dominique
  • Turc Lucile
  , 2017. Magnetic clouds are very geoeffective solar events capable to trigger strong magnetic storms in the terrestrial magnetosphere. However their interaction with the magnetosphere and their level of geoeffectivity are not yet fully understood. Some effects as the occurrence of other events (jets, shocks, other clouds, ) in the immediate surroundings of the clouds are known to affects their geoeffectivity. We present here additional effects capable to modify their geoeffectivity which are directly related to the interaction of the clouds with the terrestrial environment. From observations and simulations, we have shown that the quasi-perpendicular or quasi-parallel configuration of the clouds at the bow shock preserves or changes the clouds magnetic structure downstream of the bow shock. In order to estimate further the consequences of these effects for the clouds interaction with the magnetophere, we run 3D hybrid simulations of the interaction of a magnetic cloud with the Earths bow shock. We investigate the plasma and field distributions downstream of the bow shock and next to the magnetopause. We examine their role in triggering crucial processes for the magnetospheric activity as magnetic reconnection and surface instabilities. We compare the effects obtained for both quasi-perpendicular and quasi-parallel configurations at the bow shock.
• Non-universality of the turbulent spectra at sub-ion scales in the solar wind: dispersive effects versu the Doppler shift
  
  • Sahraoui Fouad
  , 2017.