Publications

2013

• The influence of the characteristic size of electropositive and electronegative plasmas with a localized magnetic field
  
  • Bredin Jérôme
  • Chabert Pascal
  • Aanesland Ane
  , 2013.
• Thin Film Deposition with Tailored Voltage Waveforms: Material Questions and Practical Answers
  
  • Johnson E.V.
  • Bruneau Bastien
  • Delattre Pierre-Alexandre
  • Lafleur Trevor
  • Booth Jean-Paul
  , 2013.
• Status on the Project of Laser Based Production, Acceleration and Neutralization of High Power Neutral (H or D) Beam for Demo Application
  
  • Moustaizis Stavros
  • Auvray Philippe
  • Larour Jean
  • Perrakis C.
  • Ducret J.-E.
  , 2013. communication orale
• Origin of extracted H- ions at different plasma grid bias in caesiated ion sources
  
  • Bacal M.
  • Mcadams R.
  • Surrey E.
  , 2013.
• Generation of High Pulsed magnetic field using low inductance switches
  
  • Auvray Philippe
  • Larour Jean
  • Moustaizis Stavros
  , 2013. On présente plusieurs dispositifs de production de courants intenses (jusqu'à 900 kA sous 30 kV) pour magnétiser des volumes d'interaction laser-matière de quelques cm3 pendant environ 1 µs. L'accent est mis sur la réalisation de deux types d'éclateur à très faible inductance et sur la connexion à une chambre à vide.
• Numerical Evaluation of the Role of Reflectors to Maximize the Power Efficiency of an Axial Vircator (keynote)
  
  • Champeaux Stéphanie
  • Gouard Philippe
  • Cousin Richard
  • Larour Jean
  , 2013, pp.4A-High Power Microwaves I. Keynote speech on HPM. The effects of introducing one or more reflectors inside an axial Vircator are analyzed using CST-Particle Studio (TM) PIC simulation. The power conversion efficiency is shown to be enhanced from 1% to 13% at 3 GHz. The optimum output power is obtained with three reflectors. Abstract disponible sur http://www.ivec2013.org/ Texte de 2 pages sur clé USB distribué aux participants mais non public.
• Propagation of Plasmas in Liquids
  
  • Rousseau Antoine
  , 2013.
• Guiding of meter scale AC discharges by laser filamentation in air
  
  • Houard Aurélien
  • Brelet Yohann
  • Point G.
  • Carbonnel Jérôme
  • André Y-B.
  • Prade Bernard S.
  • Arantchouk Léonid
  • Mysyrowicz André
  , 2013. We report experiments of laser-guided discharges obtained in air with high voltage bursts delivered by a compact Tesla coil. Characteristics of the guided discharges are studied for electrode gaps ranging from 30 to 170 cm.
• Plasma column from laser filamentation in air as a virtual radio-frequency antenna
  
  • Point G.
  • Brelet Yohann
  • Houard Aurélien
  • Carbonnel Jérôme
  • Arantchouk Léonid
  • Prade Bernard S.
  • André Y-B.
  • Mysyrowicz André
  , 2013. We demonstrate the use of a plasma column created by femtosecond filamentation and heated by means of a high-voltage discharge communication orale CD-10.1
• Dynamics of Cl<SUB>2</SUB> inductively-coupled plasmas: Role of electronic and vibrational excitation
  
  • Booth Jean-Paul
  • Sirse Nishant
  • Chabert Pascal
  • Indelicato P.
  • Surzhykov A.
  • Kushner M.J.
  , 2013.
• Development of plasma and beam diagnostics for the PEGASES thruster experiment
  
  • Rafalskyi D.V.
  • Aanesland Ane
  , 2013.
• A simple high-voltage high current spark gap with subnanosecond jitter triggered by femtosecond laser filamentation
  
  • Arantchouk Léonid
  • Houard Aurélien
  • Brelet Yohann
  • Carbonnel Jérôme
  • Larour Jean
  • André Yves-Bernard
  • Mysyrowicz André
  Applied Physics Letters, American Institute of Physics, 2013, 102 (16), pp.162502. We describe a simple, sturdy, and reliable spark gap operating with air at atmospheric pressure and able to switch currents in excess of 10 kA with sub-nanosecond jitter. The spark gap is remotely triggered by a femtosecond laser filament. (10.1063/1.4802927)
  DOI : 10.1063/1.4802927
• Observation of a poloidal asymmetry of fluctuation perpendicular velocity measured by Doppler backscattering on Tore Supra plasmas
  
  • Storelli A.
  • Hennequin Pascale
  • Vermare Laure
  • Gürcan Özgür D.
  • Tore Supra Team
  , 2013 (oral).
• The optimized steerable W-band Doppler reflectometer on ASDEX Upgrade: possibilities and issues
  
  • Happel T.
  • Conway G. D.
  • Hennequin Pascale
  • Honoré Cyrille
  • Giacalone J-C.
  • Simon P.
  • Stroth U.
  • Vermare Laure
  • Asdex Upgrade Team The
  , 2013 (http://www.lptp.polytechnique.fr/News/11/Workshop/papers/Happel_IRW11-paper.pdf).
• Doppler backscattering measurements on TCV
  
  • Vermare Laure
  • Coda S.
  • Hennequin Pascale
  • de Meijere K.
  • Honoré Cyrille
  • Giacalone J-C.
  • Tcv Team
  , 2013 (oral).
• Spatial propagation of turbulence and formation of mesoscopic structures in GK simulations
  
  • Dif-Pradalier Guilhem
  • Ghendrih Ph.
  • Diamond P.H.
  • Garbet X.
  • Grandgirard V.
  • Palermo F.
  • Sarazin Y.
  • Strugarek Antoine
  • Abitboul J.
  • Gürcan Özgür D.
  • Hennequin Pascale
  • Morel Pierre
  • Vermare Laure
  , 2013 (http://ttf2013.ucsd.edu/TTF_Meeting/Home.html).
• Damping of Geodesic Acoustic Modes.
  
  • Vermare Laure
  • Hennequin Pascale
  • Gürcan Özgür D.
  • Morel Pierre
  • Tore Supra Team
  , 2013 (oral).
• Geodesic acoustic modes:ffsimultaneous observation of density,ff magnetic-field, and flow componentsff in the TCV tokamak
  
  • Coda S.
  • de Meijere K.
  • Huang Z.
  • Vermare Laure
  • Vernay T.
  • Vuille V.
  • Brunner Stephan
  • Dominski J.
  • Hennequin Pascale
  • Krämer-Flecken A.
  • Merlo G.
  • Porte L.
  , 2013 (oral).
• Eleven years of Cluster observations of whistler-mode chorus
  
  • Santolík O.
  • Macusova E.
  • Kolmasova Ivana
  • Cornilleau-Wehrlin Nicole
  • Pickett J. S.
  , 2013, 15, pp.EGU2013-10234. Electromagnetic emissions of whistler-mode chorus carry enough power to increase electron fluxes in the outer Van Allen radiation belt at time scales on the order of one day. However, the ability of these waves to efficiently interact with relativistic electrons is controlled by the wave propagation directions and time-frequency structure. Eleven years of measurements of the STAFF-SA and WBD instruments onboard the Cluster spacecraft are systematically analyzed in order to determine the probability density functions of propagation directions of chorus as a function of geomagnetic latitude, magnetic local time, L* parameter, and frequency. A large database of banded whistler-mode emissions and time-frequency structured chorus has been used for this analysis. This work has received EU support through the FP7-Space grant agreement no 284520 for the MAARBLE collaborative research project.
• Analysis of amplitudes of equatorial noise emissions and their variation with L, MLT and magnetic activity
  
  • Hrbackova Z.
  • Santolík O.
  • Cornilleau-Wehrlin Nicole
  , 2013, 15, pp.EGU2013-10281. Wave-particle interactions are an important mechanism of energy exchange in the outer Van Allen radiation belt. These interactions can cause an increase or decrease of relativistic electron flux. The equatorial noise (EN) emissions (also called fast magnetosonic waves) are electromagnetic waves which could be effective in producing MeV electrons. EN emissions propagate predominantly within 10° of the geomagnetic equator at L shells from 1 to 10. Their frequency range is between the local proton cyclotron frequency and the lower hybrid resonance. We use a data set measured by the STAFF-SA instruments onboard four Cluster spacecraft from January 2001 to December 2010. We have compiled the list of the time intervals of the observed EN emissions during the investigated time period. For each interval we have computed an intensity profile of the wave magnetic field as a function of frequency. The frequency band is then determined by an automatic procedure and the measured power spectral densities are reliably transformed into wave amplitudes. The results are shown as a function of the McIlwain's parameter, magnetic local time and magnetic activity - Kp and Dst indexes. This work has received EU support through the FP7-Space grant agreement n 284520 for the MAARBLE collaborative research project.
• Case study of an atypical magnetopause crossing
  
  • Dorville Nicolas
  • Belmont Gérard
  • Rezeau Laurence
  • Grappin Roland
  • Retinò Alessandro
  , 2013, 15, pp.EGU2013-2279.
• Magnetic field and plasma fluctuations in CME-driven sheath regions
  
  • Kilpua E. K. J.
  • Hietala H.
  • Koskinen H.
  • Fontaine Dominique
  • Turc Lucile
  , 2013, 15, pp.2855. Coronal mass ejection (CME)-driven sheath regions exhibit large-amplitude interplanetary magnetic field and dynamic pressure fluctuations, which may enhance the solar wind-magnetosphere coupling and lead to larger geomagnetic activity. The internal structure of CME sheath region is extremely complex as it gradually forms when the CME propagates from the Sun to the orbit of the Earth. In this study we perform a statistical superposed epoch analysis of the magnetic field and dynamic pressure fluctuations in sheath regions observed by the ACE spacecraft near Lagrangian point L1 using the wavelet analysis. In particular, we investigate where in the sheath the fluctuation power is strongest and how its level and distribution within the sheath depends on the CME properties (speed, strength and the closest approach distance from the CME center). We found that there is a sharp decrease in the magnetic field Ultra Low Frequency (2-15 minutes) power between the sheath and the CME leading edge. We suggest that this decrease can be used as a proxy for the CME front boundary.
• Impact of the Earth bow shock crossing on magnetic clouds structure
  
  • Turc Lucile
  • Fontaine Dominique
  • Savoini Philippe
  • Kilpua E. K. J.
  , 2013, 15, pp.4848. In the solar wind, magnetic clouds (MC) display a well-defined magnetic structure. When they reach the vicinity of the Earth, their structure is modified by their interaction with the Earth environment. In this study, we focus on the bow shock crossing of MCs, and more specifically on how it alters their magnetic structure. We compare observations from the Cluster spacecraft in the magnetosheath to ACE magnetic field measurements in the solar wind, in order to highlight the differences before and after the bow shock crossing. We find that the magnetic field amplitude is higher inside the magnetosheath, as expected from the compression behind the shock, but that the magnetic field direction can exhibit different features. It can be similar to the solar wind magnetic field direction, display a phase shift or the smooth rotation can even disappear in the magnetosheath. The correlation between the variation of the magnetic field direction from the solar wind to the magnetosheath and the shock obliquity angle is investigated. Finally, a simple 3D MHD model is developed to describe the interaction of a MC with the bow shock and calculate the magnetic field amplitude and direction inside the magnetosheath. We show several outputs of the model, corresponding to different orientations of the MC axis. We compare these modeled cases to observations. In some cases, the results show that the trends are in qualitative agreement, and other cases are further discussed.
• Evidence of coherent drift-resonant acceleration of radiation belt particles by ULF waves
  
  • Sauvaud J.-A.
  • Walt M.
  • Delcourt Dominique C.
  • Benoist C.
  • Penou E.
  • Chen Y.
  • Russell Christopher T.
  , 2013, 15, pp.EGU2013-1830. Evidence is presented for frequent, coherent and powerful accelerations of radiation belt electrons and protons during magnetic storms. Geomagnetic storms are indeed frequently associated with the formation of well developed, multiple bands of energetic electrons inside the inner radiation belt at L=1.1-1.9 and with prominent similar energy structures of protons inside the slot region at L=2.2-3.5. These structures typically from 100 keV up to the MeV range result from coherent interactions of energetic particles with quasi- monochromatic Ultra Low Frequency waves (ULF). These waves are induced by magnetospheric changes due to the arrival of dense solar material and related nightside injections of particles from the outer magnetosphere that destabilize field lines in the inner magnetosphere down to L=1.1. We show that, at the low altitudes of the Demeter spacecraft, these structures are best seen near the South Atlantic Anomaly because of lowering of the belt particle mirror point. As evidenced from ground measurements, energy bands are associated with quasi-sinusoidal ULF Pc5 and Pc4 waves with periods in the 1000 second range for L = 1.1-1.9 and in the 60 second range for L=2.2-3.5. Numerical simulations of the coherent drift resonance of energetic particles with Ultra Low Frequency waves show how the particles are accelerated and how the observed structures build up. The structures are formed for interaction times of the order of 20-40 minutes. For longer resonance times, particles are accelerated at energies higher than 1.5 MeV while lower energy particles are decelerated.
• Europlanet/IDIS: Combining Diverse Planetary Observations and Models
  
  • Schmidt Walter
  • Capria Maria Teresa
  • Chanteur Gérard
  , 2013, 15, pp.6726. Planetary research involves a diversity of research fields from astrophysics and plasma physics to atmospheric physics, climatology, spectroscopy and surface imaging. Data from all these disciplines are collected from various space-borne platforms or telescopes, supported by modelling teams and laboratory work. In order to interpret one set of data often supporting data from different disciplines and other missions are needed while the scientist does not always have the detailed expertise to access and utilize these observations. The Integrated and Distributed Information System (IDIS) [1], developed in the framework of the Europlanet-RI project, implements a Virtual Observatory approach ([2] and [3]), where different data sets, stored in archives around the world and in different formats, are accessed, re-formatted and combined to meet the user's requirements without the need of familiarizing oneself with the different technical details. While observational astrophysical data from different observatories could already earlier be accessed via Virtual Observatories, this concept is now extended to diverse planetary data and related model data sets, spectral data bases etc. A dedicated XML-based Europlanet Data Model (EPN-DM) [4] was developed based on data models from the planetary science community and the Virtual Observatory approach. A dedicated editor simplifies the registration of new resources. As the EPN-DM is a super-set of existing data models existing archives as well as new spectroscopic or chemical data bases for the interpretation of atmospheric or surface observations, or even modeling facilities at research institutes in Europe or Russia can be easily integrated and accessed via a Table Access Protocol (EPN-TAP) [5] adapted from the corresponding protocol of the International Virtual Observatory Alliance [6] (IVOA-TAP). EPN-TAP allows to search catalogues, retrieve data and make them available through standard IVOA tools if the access to the archive is compatible with IVOA standards. For some major data archives with different standards adaptation tools are available to make the access transparent to the user. EuroPlaNet-IDIS has contributed to the definition of PDAP, the Planetary Data Access Protocol of the International Planetary Data Alliance (IPDA) [7] to access the major planetary data archives of NASA in the USA [8], ESA in Europe [9] and JAXA in Japan [10]. Acknowledgement: Europlanet-RI was funded by the European Commission under the 7th Framework Program, grant 228319 "Capacities Specific Programme" - Research Infrastructures Action. Reference: [1] Details to IDIS and the Europlanet-RI via Web-site: http://www.idis.europlanet-ri.eu/ [2] Demonstrator implementation for Plasma-VO AMDA: http://cdpp-amda.cesr.fr/DDHTML/index.html [3] Demonstrator implementation for the IDIS-VO: http://www.idis-dyn.europlanet-ri.eu/vodev.shtml [4] Europlanet Data Model EPN-DM: http://www.europlanet-idis.fi/documents/public_documents/EPN-DM-v2.0.pdf [5] Europlanet Table Access Protocol EPN-TAP: http://www.europlanet-idis.fi/documents/public_documents/EPN-TAPV₀.26.pdf [6] International Virtual Observatory Alliance IVOA: http://www.ivoa.net [7] International Planetary Data Alliance IPDA: http://planetarydata.org/ [8] NASA's Planetary Data System: http://pds.jpl.nasa.gov/ [9] ESA's Planetary Science Archive PSA: http://www.sciops.esa.int/index.php?project=PSA [10] JAXAs Data Archive and Transmission System DARTS: http://darts.isas.jaxa.jp