PLAS@PAR scientific day - OCTOBER 5, 2020

Location: Conference Center at Sorbonne Université (Pierre et Marie Campus, Tower 44 - first floor - ROOM 108) & via ZOOM.


  • 09:00 : Martin Lemoine, IAP - Plasma physics in the high-energy multi-messenger Universe
  • 09:35 : Iyas Ismail, LCPMR - MOSARIX: a high resolution high efficiency moveable X-ray spectrometer project in the tender x-ray region (2-10 keV)
  • 10:10 : Nicolas Aunai, LPP - Parallel hybrid code with adaptive mesh refinement
  • 10:45 : Pause
  • 11:00 : Laurence Rezeau, PLAS@PAR, Quelques nouvelles institutionnelles
  • 11:35 : Sophie Musset, LESIA, Solar Orbiter - Objectifs scientifiques et premières observations
  • 12:10 : Jean Porto, ONERA - Electromagnetic PIC Simulation of an ECR Plasma Thruster with Magnetic Nozzle
  • 12:45 : Pause & session poster
    • V. Bommier, LESIA, Solar photosphere magnetization 
    • L. Hadid, LPP, Polarization electrostatic field in the presence of negatively charged nm grains: implications for dust confinement near Saturn’s F ring 
    • S. AL Qeeq, LPP, Analysis of energy conversion processes at kinetic scales associated with a series of dipolarization fronts observed by MMS during a substorm
    • P. Indelicato, LKB, Transition energies, widths and intensity ratios of core-excited lithiumlike sulfur and argon using an electron-cyclotron-resonance ion source plasma
  • 14:00 : Ronan Modolo, LATMOS - Modélisation des réponses des magnétosphères planétaires lors des tempêtes solaires, R. Modolo, F. Leblanc , D. Fontaine, et al.
  • 14:35 : Farzi Arefi, LISE - Traitement de surface des polymères par procédés plasma pour les applications biomédicales
  • 15:10 : Lina Hadid, LPP - L’ionosphère de Saturne mesurée par la sonde de Langmuir durant le "Grand Finale" de la mission Cassini
  • 15:45 : Pause
  • 16:00 : Franck Delahaye, LERMA - New opacities for Astrophysical Applications
  • 16:35 : Anthony Mercuri, LULI - Electron positron pair production in collisions of gamma photons and high intensity vortex beams

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PLAS@PAR scientific day 2020

January 13, 2020

CONFERENCE CENTER (Pierre et Marie Campus, Tower 44 - first floor - ROOM 108)


  • 09:30 - 10:00: Chantal Stehlé, Alain Dubois and Philippe Savoini, PLAS@PAR activity report
  • 10:00 - 10:20: Nicolas Sisourat, Modeling iodine plasma for electric propulsion
  • 10:20 - 10:40: Michael Grech, Laser-plasma interaction: from new light and particle sources to laboratory astrophysics
  • 10:40 - 10:50: Break
  • 10:50 - 11:10: Carine Briand, from space to laboratory plasmas (Title to be confirmed)
  • 11:10 - 11:30: Thierry Dufour, Plasma for medicine (Title to be confirmed)
  • 11:30 - 11:50: Emily Lamour and Sébastien Steydli, FISIC: from desorption yield measurement to low energy ion detection
  • 11:50 - 12:10: Debek Radoslaw, Controlled surface discharges for the miniaturization of plasma-catalytic reactors
  • 12:10 - 12:30: Christophe Blondel, Magnetic-field enhanced photodetachment for neutral beam injectors
  • 12:30 - 12:50: Concluding remarks 
  • 12:50 - 14:00: Posters & buffet 
    • V. Bommier, Solar photosphere magnetization
    • L. Tchang-Brillet, Progress on Experimental and Theoretical Studies of Heavy Element Ion Spectra
    • J.P. Booth, Kinetics of active species in an oxygen DC discharge
    • M. Berthomier, Innovative plasma spectrometers for space research
    • L. Hadid, Polarization electrostatic field in the presence of negatively charges grains: implications for dust levitation near Saturn's F ring
  • 14:00: Research Federation's General meeting, called by Laurence Rezeau:
    • Introduction by the board of trustees
    • General information about the Federation
    • Presentation of the laboratories
    • First discussions on the work's organization and the orientations
  • 16:00: Coffee break




PLAS@PAR scientific day 2019

February 14th, 2019

CONFERENCE CENTER (Tower 44 - first floor - ROOM 108 - Pierre et Marie Campus) 


Provisional program:

09h00 Welcome & Coffee 
09h30  PLAS@PAR Scientific Day – Introduction // E. Kierlik, Director of Sorbonne University Physics Department & C. Stehlé, Director of Labex PLAS@PAR
10h00  Z. Meliani (LUTH)Relativistic flows and shocks in astrophysics
10h20 – J. Palaudoux (LCPMR), High Resolution Auger/PhotoElectron Coincidence Spectroscopy
10H40 C. Honoré (LPP), Observation of instabilities inside Torix, a magnetized toric plasma

11H00  V. Piepiora (ENERGO),  ENERGO s tart-up

11h20 – Coffee break

11h40  S. Bolanos (LULI/LPP), Study of magnetic reconnection dynamics using laser-produced B fields in plasmas
12h00 – J-B. Layly (ONERA), Contacts subject to high currents: Fundamental processes and application to the interaction of lightning with aeronautical assemblies
12h20 – J-L. Bobin (LULI), 1969, a landmark experiment in laser fusion
12h30 – F. Borde (Groupe scolaire Fénelon Sainte-Marie La Plaine Monceau), Parler des plasmas aux collégiens ? Quelques enjeux pédagogiques

12h40 – Lunch and vote for PLAS@PAR 2019 photo-video competition & Poster session

Provisional poster list:

  • D. Schury (INSP): The low energy beamline of the FISIC experiment: purification and charge state analysis - Read more
  • V. Andraud (ONERA): Étude expérimentale du déplacement de l’arc électrique lors du foudroiement d’un aéronef - Read more
  • J.C. Porto Hernandez (ONERA): Kinetic Simulation of a Magnetized Plasma in an ECR Thruster - Read more
  • J. Capitaine (LPP/LERMA): Title TBC
  • V. Bommier (LESIA): Would the Sun's surface be negatively charged ? - Read more
  • F. Magalhaes (LESIA): Saturn's UV aurorae as seen from Cassini: building a high level database
  • V. Cayatte (LUTH):  Semi-analytic model of MHD flows with plasma injection and energetic exchange around Kerr black holes
  • L. Tchang-Brillet (LERMA): Laboratory VUV Spectra of Heavy Element Ions. Examples. - Read more
  • G. Gauthier (LPP): Turbulence and microprocesses in inhomogeneous solar wind plasmas. - Read more
  • M. Menu (LPP/LERMA):  Astrophysical dynamos
  • T. Dufour (LPP): Plasma medicine: treatment of cholangiocarcinom
  • M. de Anda Villa (INSP): Ultrafast structural dynamics of metals probed by photoemission electron spectroscopy
  • A. Marret (LERMA): On the saturation of the non-resonant streaming instability
  • S. Marini (LULI): Surface plasma waves in ultra-relativistic regime - Read more
  • A. Alvarez Laguna (LPP): Numerical strategies for the fluid simulation of low-temperature plasmas - Read more
  • M. Berthomier (LPP): 3D Electron spectrometers
  • N. Aunai (LPP), A. Ciardi (LERMA), R. Smets (LPP): Parallel Hybrid code with Adaptive mesh REfinement
  • T.L. Chng (LPP): Electric Field Measurements in Plasmas Using Second Harmonic Plasmas
  •  M. Mikhail (IJLRA): Plasma Catalytic Hybrid Process for CO2 methanation
  • K. Barczynski (LESIA): The dynamics of the solar ares: the evolution of electric current in the ux rope footpoints - Read more
  • K. Oubrerie (LOA): Axiparabola: a long focal depth, high resolution mirror for broadband high intensity lasers - Read more
  •  J. Barbosa Martins (LCPMR): Excited Electronic States in Thiophene and Thiolane using Resonant Auger Spectroscopy - Read more
  •  C. Moissard  (LPP): Power and anisotropy of magnetic fluctuations in the sheaths of magnetic clouds
  •  I. Orel (LPP): Understanding Fast Ionization Waves in Nanosecond Discharges: E-field measurements
  •  O. Guaitella  (LPP): Measurement ofelectric field components in dielectric targets exposed to atmospheric pressure plasma jets
  •  L. Matteini (LESIA): What is the link between low magnetic field compression and the 1/f range of turbulent spectra in the fast solar wind?

14h00 – J. Fuchs (LULI), Nucleosynthesis of very heavy elements using a new generation of ultra-intense lasers
14h20  J. Faure (LOA), Electron acceleration using single-cycle light pulses
14h40 J. Pulpytel (LISE), Surface treatments and functional coatings deposited by atmospheric cold plasma

15h00  D. Schury (INSP), FISIC – Atomic Physics of Fast Ion-Slow Ion Collisions
15h20  S. Marini (LULI), Plasmonics in ultra-relativistic regime
15h40 – Coffee break 

16h00  T. Marchenko (LCPMR), Very efficient ionisation mechanisms with XFEL pulses
16h20 J. Vaquero (LPP), Cold atmospheric plasmas applied to the treatment of cholangiocarcinomas
16h40 M. Campos Pinto (LJLL), Denoising of particle codes with local optimization methods
K. Barczynski (LESIA),  Flare reconnection-driven magnetic field and Lorentz force variations at the Sun's surface

17h20 S. Colombo (LERMA),  Radiation magnetohydrodynamic models and spectral signatures of plasma flows accreting onto young stellar objects
L. Rezeau (PLAS@PAR/LPP), The plasma physics community in Paris in 2020?

18h00 – Cocktail and results of photo-video competition at Tour Zamansky, Panoramic room 2400


Affiche JSCQ emailing



PLAS@PAR scientific day 2018

February 9th, 2018

CONFERENCE CENTER (Tower 44 - first floor - ROOM 108 - Pierre et Marie Campus) 


09h30 – Welcome & Coffee 
10h00  PLAS@PAR Scientific Day – Introduction // C. Stehlé, Director of PLAS@PAR
10h10 – V. Guerra (IPFN), Plasma Physics research at IPFN / IST Lisbon – Overview
10h40 A. Alexandrova (LPP), Magnetic reconnection in the near-Earth space plasma, from ion to electron scales
11H00 - D. Kuzzay (LESIA), Energy transfers in solar wind turbulence

11h20 – Coffee break

11h40 – A. Dubois (LCPMR), Modeling electronic processes in atomic and molecular collisions
12h00 P.Q. Elias (ONERA), Uncommon non-intrusive diagnostic techniques for electric thrusters
12h20 P. Frey (ISCD), Research and technology transfer at ISCD & Carnot SMILES – Overview

12h50 – Lunch and vote for PLAS@PAR 2018 photo-video competition & Poster session

  • L. Tchang-Brillet, LERMA :  Spectres d’émission de lanthanides ionisés dans l’ultraviolet du vide. Exemple : Eu IV
  • V. Bommier, LESIA : Divergence du champ magnétique dans la photosphère solaire
  • A. Chatterjee, LPP : TDC
  • F. Niel, LULI : From quantum to classical modelling of radiation reaction: a focus on stochasticity effects
  • S. Marini, LULI : Single electron dynamics in a Hall thruster electromagnetic field profile
  • E. Slikboer, LPP : Electric field measurements in dielectric targets under exposure of non thermal plasma jets using Mueller Polarimetry
  • M. Hofmans, LPP : Influence of a target on the electric field profile in a kHz atmospheric pressure plasma jet
  • A.S. Morillo-Candas, LPP : O atom kinetics in CO2 plasmas
  • M. De Anda Villa, INSP : Development of an XUV beamline for femtosecond time-resolved photoelectron spectroscopy
  • A. Kumar, S. Steydli, INSP : Latest advancements in the Fast Ion-Slow Ion collision project
  • M. Alicherif, SU - G. Gauthier, SU -  Q. Nouailhetas, SU -  A. Roussin, SU -  L. Teixeira, SU -  A. Thirouard, SU - D. Tordeuxet, SU - C. Prigent, SU/INSP : Études autour de la physique des plasmas à l’aide des décharges luminescentes
  • F. Judée, S. Simon, C. Bailly, T. Dufour, LPP : Investigating the plasma-activation of water to tailor short/long lifetime radicals for agriculture issues
  • S. Colombo, LERMA : Effects of intense flaring activities on the accretion disk of a classical T Tauri star
  • B. Tabone, LERMA : MHD disk wind with ALMA: the HH212 test case
  • B. Wurmser, LCPMR : Photoemission delays in 2D model molecules

14h30 – C. Couffy (Centre Pompidou) & X. Fresquet (PLAS@PAR), Arts and Plasma science: an experience of ionized matter - Information
15h00 – A. Bourdon (LPP), Why always more efficient and accurate methods to solve Poisson’s equation are needed for electrostatic PIC and fluid plasma simulations?
15h20 – M. Grech (LULI), SMILEI, overview and new challenges

15h40 – M. Khalal (LCPMR), Multiple Auger Decay of the Potassium 2p Holes and its Satellites
16h00 – Coffee break 

16h20 – C. Spielmann (GSI/Jena) – Plasma Physics research at GSI/Jena – Overview
16h50 – M. Menu (LPP/LERMA), Rotating turbulent dynamos
17h10 – E. Lamour (INSP), FISIC project – Overview and challenges
17h30 – D. Vernhet (PLAS@PAR), PLAS@PAR – Agenda for 2018 and discussion on possible future evolution

18h00 – Cocktail and results of photo-video competition


Flyer journee scientifique Page 1


PLAS@PAR scientific day 2017

January 26th, 2017

Jussieu Campus - Lecture Hall Durand - Esclangon building

Full program (PDF)


09h30 – Welcome and coffee

10h00  PLAS@PAR Scientific Day – Introduction 

V. Atger (Sorbonne Universities) – C. Stehlé (PLAS@PAR) - downloadable PDF


Morning session – Chair: D. Vernhet (INSP)

10h30 – R. Taieb (LCPMR), Harmonic generation and Wigner function: diagnosis for ionization dynamics.

10h50 –  A. Puglisi (LCPMR), Ab-initio spectroscopic study of silicon hydride molecular ions

11h10 – L. Nicolas (LPP/LERMA), Effects of collisions on streaming instability downloadable PDF

11h30 – Coffee break

11h50 – S. Rassou (ONERA), Numerical modeling of a glow discharge through a supersonic bow shock in air - downloadable PDF

12h10 –  A. Gibson (LPP), Hybrid simulations of plasmas in molecular gases: experimental validation and quantification of unknowns

12h30 – PLAS@PAR’s 2017 agenda – general update & discussion

C. Stehlé & D. Vernhet (PLAS@PAR)

13h00 – Lunch and vote for PLAS@PAR 2017 photo/video competition
Poster session

  • J.B. LAYLY,  ONERA: Micro-discharges in confined media: fundamental processes  and application to lightning and interaction with matter
  • A. ROUSSEAU, LPP: Indoor air purification and atmospheric chemistry using Cold Plasmas
  • J. GUYOT, LERMA: Implementation of a PIC module for the 3D MHD code GORGON
  • A. BIANCALANI, Max-Planck Institute for Plasma Physics, Garching: Gyrokinetic investigation of Alfven instabilities & geodesic acoustic modes in tokamaks.
  • M. LABEYE, LCPMR: Gaussian continuum basis function for calculating High Harmonic Generation spectra.
  • M. KHALAK, LCPMR: Experimental investigation of 4d-15p-1 core-valence double photoionization in Xenon
  • R.L. SINGH, LERMA: Collision of two radiative shocks at the PALS laser facility


Afternoon session – Chair: C. Stehlé (LERMA)

14h30 – B. Honnorat (LPP), Non thermal plasma for medical applications  

14h50 –  O. Guaitella (LPP), Dynamics of the vibrational excitation in a pulsed CO2 glow discharge

15h10 –  V. Bommier (LESIA), Solar magnetic fields and plasma physics (from measurements) downloadable PDF

15h30 – S. Hess (ONERA Toulouse), Plasma-surface interactions in space - SPIS software

15h50 – M. Lemoine (IAP), Collisionless shock waves in the (very) high energy Universe downloadable PDF

16h10 – Coffee break

16h30 –  S. Cabrit (LERMA), Shocks and molecules in protostellar jets: models vs observationsdownloadable PDF

16h50 –    A. Sgattoni (LULI), Plasma instabilities and radio emissions in the solar wind downloadable PDF

17h10 –    PLAS@PAR’s future – general update & discussion

C. Riconda (LULI) & C. Briand (LESIA) downloadable PDF

17h30 – Cocktail and results of photo/video competition


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PLAS@PAR scientific day 2016

January 22nd 2016
Charpak / LPNHE Lecture Hall – Jussieu Campus
4, Place Jussieu – 75005 Paris


09h30 – Welcome and coffee
Charpak / LPNHE lecture hall

Morning session – Chair: Carine Briand
Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique

10h00  PLAS@PAR Scientific Day – Introduction
Direction du Labex PLAS@PAR

10h15 – York Plasma Institute: general overview of Plasma Physics in the University of York and YPI-LPP collaborative projects
Howard Wilson, York Plasma Institute

10h50 – PHARE: PLAS@PAR’s new hybrid code
Andrea Ciardi, Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères

11h00 – Charge-conserving schemes of conforming and DG type for Maxwell and PIC
Martin Campos-Pinto, Laboratoire Jacques-Louis Lions

11h20 – Coffee break

11h40 Flare particle escape in 3D solar eruptive events
Sophie Masson, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique

12h00 – Origin of the accelerated particles observed in the upstream of the Earth’s Bow shock: contribution of 2D full-particle simulations
Philippe Savoini, Laboratoire de Physique des Plasmas

12h20 – PLAS@PAR’s future – general discussion
Direction du Labex PLAS@PAR

13h00 – Lunch and vote for PLAS@PAR 2016 photo competition

Poster session
INSP – Tower 22-23, 3rd floor, room 317


Alessandro Biancalani, Max-Planck Institute for Plasma Physics, Gyrokinetic PIC simulations of energetic-particle-driven instabilities in tokamak plasmas
Simon Bolanos, LULI, Amplification of short laser pulses by Stimulated Brillouin Backscattering
Florian Condamine, LULI, M-shell resolved high-resolution X-ray spectroscopic study of transient matter evolution: study of hot electrons in kJ-laser produced plasmas
Patrick Da Costa, Magdalena Nizio, Rafik Benrabbah, IJLRA, Hybrid plasma catalytic methanation of CO2 at low temperature
Marie-Christine Firpo, LPP, Role of magnetic field chaos and electric field during magnetic reconnection in tokamaks
Bruno Honnorat, LPP, Diagnostics for plasma medicine
Zixian Jia, LPP, In-situ and real-time monitoring of atmospheric pollutant oxidation on a catalytic surface under plasma exposure
Anna Levy, ISNP, Time-resolved studies of the gold solid-liquid phase transition at the femtosecond timescale
Sonny Lion, LESIA, Involvement of phase coherence in solar wind turbulence
Nicolas Sisourat, LCPMR, Electronic processes in keV Li3+ - ground and excited hydrogen collisions : atomic data for plasma diagnosis
Guilhem Revet, LULI, Laboratory modeling of magnetized accretion dynamics

Afternoon session – Chair: Emily Lamour
Institut des NanoSciences de Paris

14h30 – Radiative shock experiments on the Orion laser
Francisco Suzuki-Vidal, Imperial College

14h50 Heliospheric plasmas: recent and expected contributions of LOFAR et NenuFAR
Philippe Zarka, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique

15h10 – Weibel Instability in magnetised plasma, application to astrophysics & laser-plasma interaction
Anna Grassi, Laboratoire pour l’Utilisation des Lasers Intenses

15h30 – PLAS@PAR new generation X-ray spectrometer
Iyas Ismail, Laboratoire de Chimie Physique-Matière et Rayonnement

15h50 – Simulation of lightning stroke at Onera
Fabien Tholin, Office National d'Etudes et de Recherches Aérospatiales

16h10 – Coffee break

16h30  Alternate acceleration of positive and negative ions for application in space propulsion
Pascaline Grondein, Laboratoire de Physique des Plasmas

16h50  CAP4CARE
Thierry Dufour, Laboratoire de Physique des Plasmas

17h10 – Day’s conclusion and PLAS@PAR 2016 schedule
Direction du Labex PLAS@PAR

17h30 – Cocktail and results of PLAS@PAR 2016 photo competition

Zamansky Tower – Great Hall – 24th floor



PHARE: PLAS@PAR’s new hybrid code
Andrea Ciardi, Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères
Laboratory and astrophysical plasma phenomena usually involve processes spanning over a huge range of physical and temporal scales. Many physical formalisms can be applied, such as fluid dynamics for large scale descriptions only, down to full particle (ions and electrons) codes, well suited to microphysics processes. Hybrid codes consider ions as particles and electrons as a fluid, and are well suited to covering meso-scale processes.
The aim of the PHARE project is to develop a new-generation, three-dimensional, adaptive-mesh hybrid code. In this talk we will present a general outline of the project and its organisation.

Charge-conserving schemes of conforming and DG type for Maxwell and PIC
Martin Campos-Pinto, Laboratoire Jacques-Louis Lions
In this talk we describe a unified approach to design numerical schemes of Finite-Element and Discontinuous Galerkin type with long-time stability properties for the time-dependent Maxwell and Maxwell-Vlasov systems.
Considering first the Maxwell equations alone, we identify an abstract compatibility criterion that allows to approximate the current source in such a way that a proper version of the Gauss laws is preserved. This property is then extended to the case where the current source is provided by a particle method, by means of a structure-preserving (charge-conserving) deposition scheme.
Applying this strategy, we will present new schemes of DG and DG-PIC type that are spectrally correct and charge-conserving, but do not require divergence cleaning algorithms or numerical dissipation.

Flare particle escape in 3D solar eruptive events
Sophie Masson, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
During solar eruptions, particles can be accelerated to relativistic energies. Those energetic particles can escape from the Sun, propagate in the interplanetary medium and sometimes are detected in-situ at Earth. Those solar particle events (SEPs) are among the most important, but least understood forms of space weather, which can be especially hazardous to deep-space astronauts. These SEPs are generally believed to be produced by the flare reconnection that is the primary driver of solar eruptive events (SEE). A key point is that in the standard SEE model, the particles should remain trapped in the coronal flare loops and in the ejected plasmoid, the CME. A fundamental question to understand the origin and the evolution of solar energetic particles the SEP is: How do solar energetic particles escape the Sun?
We developed a 3D model of a solar eruptive event that may lead to injection of energetic particles onto open interplanetary magnetic flux tubes. We performed high-resolution 3D MHD numerical simulations with the Adaptively Refined MHD Solver (ARMS). Our results demonstrate that the model does lead to the effective escape of energetic particles accelerated at the flare reconnection site. The release onto open field lines of energetic particles originating in the low corona is the bridge connecting the acceleration to the interplanetary propagation and is, therefore, the key to reconciling remote and in-situ observations of energetic particles.
We show how the complex interactions between the flare and breakout reconnection reproduces all the main observational features of SEEs and SEPs. We discuss the implications of our results for CME/flare models and for observations.

Origin of the accelerated particles observed in the upstream of the Earth’s Bow shock: contribution of 2D full-particle simulations
Philippe Savoini, Laboratoire de Physique des Plasmas
The ion foreshock located upstream of the Earth's shock wave is populated with ions having interacted with the shock, and then, reflected back with an high energy gain. Spacecrafts have clearly established the existence of two distinct populations in the quasi-perpendicular shock region (i.e. for 45° ≤ Bn ≤ 90°, where Bn is the angle between the shock normal and the upstream magnetic field): (i) field-aligned ion beams or « FAB » characterized by a gyrotropic distribution, and (ii) gyro-phase bunched ions or « GPB » characterized by a NON gyrotropic distribution.
One important unresolved problem is the exact origin of the particles contributing to these two populations. To our knowledge, it was the first time that full-particle simulations have been performed including self-consistently the shock front curvature and nonstationarity, and the time-of-flight effects.
Our analysis evidences that these two backstreaming populations may be reflected by the front itself and can be differentiated both in terms of interaction time and trajectory within the shock front. In particular, simulations evidence that "GPB" population is characterized by a short interaction time (Tinter = 1 to 2 tci) while the "FAB" population corresponds to a much larger time range (from 1 tci to 10 tci), where tci is the upstream ion gyroperiod.
Present individual ion trajectories evidence that "FAB" population are injected mainly along the shock front whereas the "GPB" population goes deeper into the shock front. Such differences explain why the "FAB" population loses their gyro-phase coherency and become gyrotropic which is not the case for the "GPB". This important result was not expected and greatly simplifies the question of their origin.

Radiative shock experiments on the Orion laser
Francisco Suzuki-Vidal, Imperial College
The formation of ‘radiative shocks’, shocks in which the structure of the density and temperature is affected by radiation from the shock-heated matter, is ubiquitous in many astrophysical scenarios. They are present, for instance, in Supernovae remnants, accretion disks, and in supersonic jets emanating from young stars. The study of these extreme shocks on laboratory scales has been possible only in recent years due to the development of high-power laser facilities worldwide, which allow producing plasmas with the right physical conditions for radiative shock formation. A series of experiments were recently performed on the large-scale Orion laser (UK), and looked at the formation of radiative shocks in gas-filled targets with a number of plasma diagnostics including optical interferometry and X-ray backlighting. The results show a shock moving at a velocity >60 km/s together with the formation of a ‘radiative precursor’ propagating ahead of the shock. These dynamics are in good agreement with initial 2-D, radiative-hydrodynamics simulations.

Heliospheric plasmas: recent and expected contributions of LOFAR et NenuFAR
Philippe Zarka, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
The giant European radiotelescope LOFAR, in exploitation since december 2012, and its extension NenuFAR presently in construction in Nançay, allow us to address many astrophysical themes. Among them is the study of Solar system plasmas: Solar corona (imagery of types II and III bursts, fine structures, CME), structure of the solar wid (especially via radiosource scintillation measurements), magnetospheric physics (Jupiter: decameter cyclotron and decimeter synchrotron emissions) and extrapolation to exoplanets, planetary lightning (Saturn, Uranus, Mars?, Venus?). These instruments can also be used for studying the terrestrial plasma environment (lightning, sprites and TLEs, wakes of meteors, ionospheric turbulence––density waves, anthropic perturbations, opacity - via radio propagation measurements, and possibly bistatic radar measurements). These low frequency instruments become exploitable by non-experts in radioastronomy, offering thus possibilities of new observations to the French plasmas community. They also pave the way toward space-based or Lunar VLF radio interferometry measurements, that will also have « heliospheric plasmas » scientific objectives.

Weibel Instability in magnetised plasma, application to astrophysics & laser-plasma interaction
Anna Grassi, Laboratoire pour l’Utilisation des Lasers Intenses
Collisionless shocks between energetic outflows in magnetized plasmas are ubiquitous to various astrophysical environments, from active galactic nuclei, pulsar wind nebulae to supernovae remnants. Plasma instabilities - such as the Weibel instability - provide the magnetic turbulence necessary for efficient dissipation and Fermi-type acceleration. Recent developments in laser technology and new platforms to produce high-velocity magnetized plasma flows today offer new opportunities toward the study, in the laboratory, of the processes at hand in various relativistic astrophysics scenarii. These developments must be accompanied by a deeper theoretical understanding of the physics underlying various instabilities in magnetized plasmas, as well as by high-performance computing (HPC) relevant simulations.
In this work, we consider the problem of Weibel instability in the case of two counterstreaming relativistic electron-ion plasma beams, in the presence of an external magnetic field parallel to the plasma flow. We investigate the effects of the magnetic field during the linear phase of growth of the instability and the resulting changes induced in the saturation mechanisms. The analysis is performed by means of both analytic calculations and numerical simulations carried out with the PIC code SMILEI (Simulation of Matter Irradiated by Light at Extreme Intensities) currently under development at LULI (Laboratoire d’Utilisation des Lasers Intenses).

PLAS@PAR new generation X-ray spectrometer
Iyas Ismail, Laboratoire de Chimie Physique-Matière et Rayonnement
Photon, electrons / ions coincidence measurement involving high-resolution X-ray emission in the range of 1.5 to 4 keV is a very powerful approach that would open new horizons not yet explored. At present, this was unachieved because of the efficiencies of current X-ray spectrometers. We present a development under progress of a new X-ray spectrometer, combining high efficiency and high resolution, capable of carrying out different types of multi-coincidence measurements at various large scale facilities. For instance, photon-ion coincidence measurements at XFEL and SPIRAL2, coincidence of electrons and photons produced by high intensity femtosecond laser field or synchrotron radiation. Such characteristics will be achieved by using curved mosaic crystals in conjunction with a new type of time and position resolved MCPs-based X-ray detection system.

Simulation of lightning stroke at Onera
Fabien Tholin, Office National d'Etudes et de Recherches Aérospatiales
Lightning stroke on aircrafts is a burning issue for safety, reliability and maintenance considerations in the aerospace industry. This phenomenon involves many coupled physical processes that make it difficult to estimate the thermal, mechanical and electrical constraints on materials and structures subject to lightning stroke. Among them, magnetohydrodynamics (MHD), radiative transfers, air plasma properties and lightning interaction with materials are of crucial importance. At ONERA, unit FPA is developing different numerical models to simulate lightning interaction with aircrafts. Each model is dedicated to a specific problematic, and differs by the spatial, time, and energy scales of interest.

Alternate acceleration of positive and negative ions for application in space propulsion
Pascaline Grondein, Laboratoire de Physique des Plasmas
In the electric gridded thruster PEGASES, both positive and negative ions are expelled after extraction from an ion-ion plasma. This ion-ion plasma is formed downstream a localized magnetic field placed a few centimeters from the ionization region, trapping and cooling down the electron to allow a better attachment to an electronegative gas. For this thruster concept, iodine has emerged as the most attractive option. Heavy, under diatomic form and therefore good for high thrust, its low ionization threshold and high electronegativity lead to high ion-ion densities and low RF power. After the proof-of-concept of PEGASES using SF6 as propellant, we present experimental results and modelisation data of an iodine plasma studied inside PEGASES thruster.

Thierry Dufour, Laboratoire de Physique des Plasmas
Oral squamous cell carcinomas represent the sixth most frequent cancer worldwide. Despite conventional therapies combining surgery, radiotherapy and chemotherapy, they frequently relapse hence hiring a severe prognosis with an overall survival rate lower than 20% on 10 years. Through a partnership between LPP, LIB and La Pitié Salpêtrière Hospital, the CAP4CARE project aims to engineer two types of innovative plasma-care devices for the specific treatment of these carcinomas. Their action will be evaluated following two experimental approaches: direct contact (where the tumor is exposed to the plasma) and indirect contact (where plasma activates a physiological medium that is subsequently applied on the tumor). In the direct contact approach, the quantification of long lifetime RO(N)S such as ozone and H2O2 will be achieved by absorption spectroscopy. In the indirect contact approach, the plasma-liquid (sub)interface will be studied to understand how it imparts the plasma energy and reactive species to the surrounding liquid. Finally, the influence of plasma will be evaluated in the tumor microenvironment through preclinical therapy model, multi-parametric ultrasonic monitoring of oral tumor and immuno-monitoring.


List of confirmed participants:

Christiane ADAM, ESEP
Alessandro BIANCALANI, Max-Planck-Institut für Plasmaphysik
Frédérique CHARLES, LJLL
Marie-Christine FIRPO, LPP
Sebastien GALTIER, LPP
Zixian JIA, LPP
Magdalena NIZIO, IJLRA
Francisco SUZUKI-VIDAL, Imperial College
Romain VAL, Sorbonne Universités
Howard WILSON, University of York

PLAS@PAR scientific day 2015

Date and place: January 16th, 2015 at amphi Durand, UPMC, espace Esclangon, 4 place Jussieu, 75005 Paris.
The annual meeting of Labex PLAS@PAR community
Competition for the best photo.
One day dedicated to present the main advances realized within PLAS@PAR.
The annual scientific day of PLAS@PAR was held this year on January 16th, 2015.
A large number of representatives of the laboratories participating to the labex gathered to expose their recent results covering many area of the Labex. It was also the occasion to realize the advances of the programs that have been promoted by the Labex via financial supports.
The session started with a talk on the development of plasma thrusters, a topic which is covered by LPP and ONERA, both through theory and experiments with the ultimate goal to achieve a working prototype for spacecraft propulsion.
While space propulsion aims at exploring the space, other topics were presented related to space observations and modelling. The characterization of turbulence cascade in near-Earth space plasmas using Cluster data was presented by LPP, followed by an analysis of the conservation of helicity in magnetized plasmas, both for astrophysical configurations and magnetically confined laboratory plasmas. In this lecture, presented by the LESIA, inverse cascading of helicity in a given system and the tendency to evolve towards low energy states were described and it was shown that the hypothesis of the conservation of magnetic helicity has been verified numerically for different configurations.
Focusing on laboratory plasmas the next topic, presented by the LULI explored theoretically and experimentally the possibility of using a plasma as an amplifying medium of short and intense laser pulses, in the framework of the so-called plasma optics. Appropriate numerical tools have been developed to determine the damage threshold of optical materials, namely a modern and flexible PIC code SMILEI. Likewise, the LJLL presented advanced powerful numerical developments on the solution of a bi-kinetic model, solving together Vlasov, Poisson and Ampère equations, for plasma sheets problems for which the physics is pretty well understood but difficult to handle at the mathematic level.
The morning session was concluded by a presentation, given by the LULI, on laboratory studies using high-power laser for studies of various plasma phenomena of interest for astrophysics such as magnetized plasma jet formation or magnetic reconnection. This talk highlighted the joint effort that combined experimental, theoretical and numerical studies performed by researchers from the LULI, LERMA and LPP.
The afternoon session started with a presentation, given by LPP, on the use of cold atmospheric plasmas as a new anti-cancer therapy, in a joint effort between the G. Roussy Institute and LPP.
It has been followed by presentation, also from LPP, showing how non thermal plasmas can promote CO2 as a raw material for green chemistry; namely by facilitating its dissociation trying to improve the energy efficiency up to a few 10%.
The next topic, presented by INSP, was dedicated to the program on fast ion-slow ion collisions developed within a large international collaboration that involves in particular GSI. This project, which will be set up at SPIRAL2/GANIL (a next generation accelerator built in Caen), aims at determining cross sections of the elementary electronic processes under well-controlled conditions in a collision energy domain that is unknown so far but of relevance for energy transfer in plasmas.
Several new effects in X-ray photoionization dynamics were then illustrated by results obtained during different experimental campaigns on Synchrotron beam lines within an experimental collaboration between LCPMR and Uppsala University.
A review talk from CPhT described the subtleties of ion acceleration in laser produced plasma, and the model of isothermal plasma expansion that is the basis of the so-called target normal sheet acceleration: thanks to this mechanism today laser target interaction is routinely used as a fast ion source.
The afternoon session was concluded by a presentation from ONERA on the code CEDRE, a powerful hydrodynamic code aimed at modelling flows in various conditions that are of interest in energetics.
The program of this scientific day, in its diversity and wealth, has been truly appreciated by the representatives of Plas@Par and the plasma community at large. This type of event fosters scientific exchanges and collaborations within the different Labex research groups and beyond. The results of a photo contest, organized in two categories, theory/simulation or experiment, concluded the day. The two prizes were awarded to the best pictures chosen by the participants of the Plas@Par’s scientific day.

Program: download program

Chantal Stehlé, LERMA : Labex overview (download presentation)

Trevor Lafleur, LPP: The development of cathodeless plasma thrusters for spacecraft propulsion (download presentation)

Shiong Huang, LPP: Characterization of MHD and kinetic turbulence in near-Earth space plasmas using the Cluster data (download presentation)

Etienne Pariat, LESIA: Testing Taylor's hypothesis: how to generally measure the conservation of magnetic helicity?

Marco Chiaramello, LULI: Amplification of short light pulses by parametric instabilities in a plasma (download presentation)

Mehdi Badsi, LJLL: About a bi-kinetic sheath model (download presentation)

Julien Fuchs, LULI: Using high-power laser for plasmas studies and applications: examples of collaborative work within Plas@Par (download presentation)

Ilya Marinov, LPP: Cold atmospheric plasmas as new anti-cancer therapy (download presentation)

Olivier Guaitellia, LPP: How could non thermal plasmas promote CO2 as raw material for green chemistry? (download presentation)

Alexandre Gumberidze, GSI & INSP: Preparations for the FISIC experiment at SPIRAL2 (download presentation)

Maria Novella Piancastelli, University of Uppsala & LCPMR : New effects in x-ray photoionization dynamics (download presentation)

Patrick Mora, CPHT: ion acceleration in laser-produced plasmas (download presentation)

Julien Labaune, ONERA : CEDRE (download presentation)



Winners of the photo competition

In category Experiments & Observation :

2 Julien Jarrige


Julien Jarrige, Research scientist, ONERA,

Atmospheric pressure plasma bullets impacting a dielectric surface






In category Theory & Simulation :

1 Francois RISOUD



François Risoud, LCPMR,

Quantum simulations of the ionization of an atom in a strong laser field : Phase space representation (Wigner function) of the electronic wave packet near the nucleus position, as a function of time.








PLAS@PAR scientific day 2014

Date and place: January 17, 2014 at UPMC, Jussieu 
Scientific day of the PLAS@PAR took place on the 17th of January 2014 in the Durand amphitheater of the Esclangon building at UPMC Jussieu, and brought together about 60 participants, including a significant proportion of young scientists. It concerned mainly progress initiated by the Plas@Par through doctoral and postdoctoral scholarships, or through small equipment financed by the Labex in 2013. 
This day was a reflection of the wide range of subjects involving plasmas developed within the Labex PLAS@PAR. The talks covered both theoretical and experimental activities, going, for example, from the presentation of the fundamental physical processes involved in the multiple photo-ionization encountered in plasma rockets, to charge exchange processes encountered in comets and the solar wind, as well as the spectroscopy of multiply ionized atoms, laser acceleration of particles, turbulence, radiative shocks, the ultra-fast and out of equilibrium creation of Warm Dense Matter, and on the creation of jets. All of these subjects open doors to new technological developments, or to simulation techniques.
This day also highlighted collaborations, both within the Labex and more generally at the national and international level, as for example through the participation of certain groups to the Laserlab-Europe collaboration, or through the presentations given by the invited scientists from the Tsukuba «Photon Factory» in Japan and from the University of Pisa in Italy.
Finally, at the end of this day, the two winners of the photographic competition to illustrate plasmas were awarded an ipad; the competition was a great success, with over 33 first class pictures, the photo can be seen on the Photo Gallery.


Kenji Ito, Photon Factory, Japon : «Single-photon multiple-ionization of atoms and molecules by multi-electron coincidence spectroscopy.» Download presentation
Ane Aanesland, LPP: «The physics of the PEGASES gridded ion-ion thruster and the implications of Plas@Par».
Lydia Tchang-Brillet, LERMA: «Emission spectra of moderately charged tungsten ions and of the neighboring isoelectronic ionsDownload presentation.
Andrea Macchi, CNR/INO, Univ. di Pisa: «High intensity laser-grating interactions: a step towards relativistic plasmonics» Download presentation
Nicolas Sisourat, LCPMR: «On simulating collisions between solar-wind ions and molecules from solar-system bodies»
Fouad Sahraoui, LPP: «Turbulence and heating at kinetic scales in the solar wind.»
Laurent Ibgui, LERMA: «New insights into laboratory radiative shock properties from three-dimensional radiative transfer.» 
Félix Cannat, ONERA: «Electromagnetic Wave Propagation in a Coaxial ECR Thruster.»
Ronan Modolo, LATMOS: «X-ray emission from Mars due to Solar Wind charge exchange reactions»
Anna Levy, INSP : «Generation and investigation of ultrafast and out-of-equilibrium heating of matter.» Download presentation
Jacobo Varela Rodriguez, LESIA: «Simulations of natural and industrial plasma»
Olivier Guaitella, LPP: «Atmospheric pressure plasma interacting with dielectric surfaces: the example of plasmas jets»