Publications

2019

(invité) Plasmas sources of Mercury’s magnetosphere
- Delcourt Dominique
, 2019.
Cross-field transport in a weakly magnetized, weakly ionized ICP
- Lucken Romain
- Bourdon Anne
- Chabert Pascal
, 2019.
Characterization of a kHz atmospheric pressure plasma jet: measurements of the electric field, electron properties and other plasma parameters
- Hofmans Marlous
- Guaitella Olivier
- Sobota Ana
, 2019.
Atmospheric pressure plasma jets applied to cancerology: correlating electrical configuration with in vivo toxicity and therapeutic efficiency
- Judée Florian
- Vaquero J
- Guégan S.
- Fouassier L
- Dufour Thierry
Journal of Physics D: Applied Physics, IOP Publishing, 2019, 52 (24), pp.245201. Two atmospheric pressure plasma jet (APPJ) devices-a plasma gun and a plasma Tesla jet-are compared in terms of safety and therapeutic efficiency to reduce the tumor volume progression of cholangiocarcinoma, i.e. a rare and very aggressive cancer emerging in biliary tree. For this, a three steps methodology is carried out. First, the two APPJ have been benchmarked in regard to their electrical and physico-chemical properties while interacting with material targets: dielectric plate, liquid sample, metal plate and an equivalent electrical circuit of human body. The propagation properties of the ionization wave interacting with these targets are discussed, in particular the profile of the related pulsed atmospheric plasma streams. In a second step, a dermal toxicity survey is performed so as to define an experimental operating window where plasma parameters can be changed without damaging healthy skin of mice during their exposure to plasma and without inducing any electrical hazards (burnings, ventricular fibrillation). Optimal conditions are identified discarding the conditions where slight alterations may be evidenced by histology (e.g. prenecrotic aspect of keratinocytes, alterations in the collagen structure). Hence, for the two APPJ plasma parameters these conditions are as follow: duty cycle = 14%, repetition frequency = 30 kHz, magnitude = 7 kV, gap = 10 mm and exposure time = 1 min. In a third step, the two plasma jets are utilized on cholangiocarcinoma xenograft tumor model developed in immunodeficient mice. The two devices are safe and a significant therapeutic efficiency is demonstrated with the plasma Tesla. In conclusion, we have developed a safe cold atmospheric plasma device with antitumoral properties in preclinical model of cholangiocarcinoma, opening the path for new anticancer treatment opportunities. (10.1088/1361-6463/ab0fbb)
DOI : 10.1088/1361-6463/ab0fbb
Treatment of carcinomas using atmospheric pressure plasma jets: from targets to in vivo models to investigate innocuity and therapeutic efficiency
- Judée Florian
- Vaquero J
- Fouassier L
- Dufour Thierry
, 2019. Atmospheric pressure plasma jets (APPJ) are investigated as an efficient approach to induce antitumor effects of cancerous tissues without inducing any damage (e.g. dessication, burnings). For this, a two-steps methodology has been developed where first APPJ are calibrated and characterized on targets mimicking electrical properties of living organisms (mice, human body) and second where they are applied on murine models to demonstrate their innocuity and therapeutic efficiency.
Analysis of homogenous nanosecond discharge at moderate pressure: dissociation of oxygen for plasma assisted detonation
- Cherif M Ali
- Vidal P
- Starikovskaia Svetlana M
, 2019. The present study is a preliminary step toward producing a non-equilibrium plasma capable of enhancing deflagration and detonation processes. Experiments show that single shot nanosecond discharges can produce an homogeneous plasma in O2:Ar:Air mixtures. The measurement of the deposited energy was used as an input to ZDplaskin calculation of the O/O2 dissociation ratio. The result indicates that these ratio are very small compared with those that are achived by shock processes in non-dissociated mixtures.
Kinetics of active species in a DC discharge by synchrotron VUV absorption
- Booth Jean-Paul
- Chatterjee Abhyuday
- Guaitella Olivier
- Sousa João Santos
- de Oliveira N.
- Nahon Laurent
- Lopaev Dmitry
- Zyryanov Sergey
- Rakhimova Tatyana
, 2019.
Oxygen 3P atom and O- ion density and atomic temperature in O2 DC discharge obtained by Cavity Ringdown spectroscopy
- Chatterjee Abhyuday
- Booth Jean-Paul
- Guaitella Olivier
- Drag Cyril
- Manfred Katherine
- Ricthie Grant
, 2019.
Axial electric field component in a fast ionization wave in nanosecond pulsed nitrogen discharge at 20-100 mbar
- Chng Tat Loon
- Orel Inna
- Starikovskaia Svetlana
- Adamovich I.V.
, 2019. The axial electric field component in a fast ionization wave in ns tube discharge in N2 at 20-100 mbar is measured by ps second harmonic generation with the temporal and spatial resolution of 200 ps and 0.5 mm respectively. From absolute calibration by current shunts, the peak axial electric field, 8-11 kV/cm, shows a weak dependence on pressure, with the peak reduced electric field ≈2000 Td at 20 mbar. For the same voltage conditions, pressure reduction from 100 to 20 mbar steepens the wave front from 3.0 ns to 1.0 ns FWHM.
Optical diagnostics and numerical modeling of nanosecond capillary pulsed discharge in CO2
- Pokrovskiy Georgy
- Starikovskaia Svetlana
, 2019.
Measurement of electron temperature and electron density in filamentary nanosecond surface dielectric barrier discharge
- Ding Chenyang
- Shcherbanev S.A.
- Starikovskaia Svetlana
, 2019.
Atomic nitrogen production in nanosecond tube discharges
- Orel Inna
- Chng Tat Loon
- Popov N.A.
- Starikovskaia Svetlana
, 2019. Two photon absorption laser-induced fluorescence is used to make measurements of atomic nitrogen density in nanosecond tube discharges under different conditions of specific energy deposition. The data reveals that the atomic nitrogen dissociation fraction is a strong function of this energy loading (measured in electronvolts per molecule or eV/mol), ranging from a few tenths to hundredths of a percent for 10-3 eV/mol to more than 10% for around 2 eV/mol.
Iodine as propellant for electric propulsion: updated global model and comparisons to experiments
- Marmuse Florian
- Lucken Romain
- Drag Cyril
- Booth Jean-Paul
- Bourdon Anne
- Sisourat N.
- Aanesland Ane
- Chabert Pascal
, 2019. Iodine is a promising replacement for xenon as propellant for electric propulsion devices. Cost-effective and dense, it also brings complexity in the modelling - as iodine comes as a molecule - and in the experiments, due to its low vapor pressure and slightly corrosive activity. We present an update of the global model from Grondein et al. [1], adding new reactions and electronegativity effects in the sheaths. The iodine density and temperature are measured in a real system by absorption at 1.315 μm. A CRDS experiment allowing measurements at lower pressure, and spatially resolved Langmuir probe measurements for electron density and temperature are scheduled.
Analysis of homogenous nanosecond discharge at moderate pressure: dissociation of oxygen for plasma assisted detonation
- Ali Cherif Mhedine
- Vidal Pierre
- Starikovskaia Svetlana
, 2019.
Insights into the peculiar field structure of a recent diffuse discharge under extreme voltage conditions by electric field induced second harmonic generation and optical emission spectroscopy
- Brisset A
- Chng Tat Loon
- Starikovskaia Svetlana
- Adamovich I
- Tardiveau P
, 2019. The axial temporal evolution of the electric field of a diffuse nanosecond air discharge is measured with high resolution (<100 ps). This discharge is generated at atmospheric pressure in a pin-to-plane configuration for voltages ranging from 20 to 85 kV The electric field is derived by field induced second harmonic generation. It is shown that for peak voltages above 56 kV, the electric field behind the field front increases with voltage and exceeds the ionization threshold at 85 kV. Results are compared to recent measurements [1].
Two-photon excitation cross-section of Xe revisited
- Drag Cyril
- Alkhoury Jean
- Jannaud Thomas
- Marmuse Florian
- Blondel Christophe
, 2019. Two-photon absorption laser-induced fluorescence (TALIF) is a technique commonly used for density and/or temperature diagnostics, mainly of Oxygen atoms, in flames and plasmas. The quantitative analysis is based on the comparison with the signal obtained, at a similar wavelength, in pure Xenon. The cross-section of Xenon is therefore a key parameter, but has not been confirmed by independent measurements. The present experiment aims to provide a direct measurement of this two-photon cross-section.
Characterization of a kHz atmospheric pressure plasma jet: measurements of the electric field, electron properties and other plasma parameters
- Hofmans Marlous
- Guaitella Olivier
- Sobota Ana
, 2019.
Challenges in the modeling and the simulation of low-temperature plasmas
- Bourdon Anne
, 2019.
Mass Loading the Earth's Dayside Magnetopause Boundary Layer and Its Effect on Magnetic Reconnection
- Fuselier S.
- Trattner K J
- Petrinec S.
- Denton M H
- Toledo-Redondo S.
- André M.
- Aunai Nicolas
- Chappell C R
- Glocer A
- Haaland S.
- Hesse M.
- Kistler L.
- Lavraud B.
- Li W.
- Moore T.
- Graham D
- Alm L
- Tenfjord P
- Dargent J
- Vines S K
- Nykyri K
- Burch J L
- Strangeway R J
Geophysical Research Letters, American Geophysical Union, 2019, 46 (12), pp.6204-6213. When the interplanetary magnetic field is northward for a period of time, O + from the high-latitude ionosphere escapes along reconnected magnetic field lines into the dayside magnetopause boundary layer. Dual-lobe reconnection closes these field lines, which traps O + and mass loads the boundary layer. This O + is an additional source of magnetospheric plasma that interacts with magnetosheath plasma through magnetic reconnection. This mass loading and interaction is illustrated through analysis of a magnetopause crossing by the Magnetospheric Multiscale spacecraft. While in the O +-rich boundary layer, the interplanetary magnetic field turns southward. As the Magnetospheric Multiscale spacecraft cross the high-shear magnetopause, reconnection signatures are observed. While the reconnection rate is likely reduced by the mass loading, reconnection is not suppressed at the magnetopause. The high-latitude dayside ionosphere is therefore a source of magnetospheric ions that contributes often to transient reduction in the reconnection rate at the dayside magnetopause. (10.1029/2019GL082384)
DOI : 10.1029/2019GL082384
A GPU-enabled implicit Finite Volume solver for the ideal two-fluid plasma model on unstructured grids
- Alonso Asensio Isaac
- Alvarez Laguna Alejandro
- Aissa Mohamed Hassanine
- Poedts Stefaan
- Ozak Nataly
- Lani Andrea
Computer Physics Communications, Elsevier, 2019, 239, pp.16-32. (10.1016/j.cpc.2019.01.019)
DOI : 10.1016/j.cpc.2019.01.019
Impacts of some Solar events on Ionosphere and Earths magnetic field
- Amory-Mazaudier Christine
, 2019.
A Comprehensive Diagnostic Study of a DC Positive Column in O2: a test-bed for models of plasmas in a diatomic gas
- Booth Jean-Paul
, 2019. Despite many decades of study, models of discharges in molecular gases still lack accurate data on many key collisional processes, both in the gas phase and on surfaces, necessary for reliable predictive modeling. Good data is lacking for electron-impact dissociation, surface recombination, reactions with metastables, gas heating mechanisms, energy transfer, and surface thermal accommodation. This is true even for such “simple” and ubiquitous gases as O2 and N2. Diagnostic techniques have advanced significantly, with an emphasis on accurate absolute density measurements, space and time resolution, and energy distribution functions (translational, rotational and vibrational). However, most studies focus on measuring only a few of the modeled parameters for a given system, and often in plasma configurations optimized for applications rather than for model/experiment comparison. Particularly problematic is the presence of large gradients (in temperature, density, composition) as well as poorly-controlled surface conditions. Our approach therefore is to use a well-characterized, stable and uniform discharge chosen to be simple to model, namely a DC positive column in pure O2, and to perform a comprehensive set of measurements of all accessible parameters using multiple (and sometimes overlapping) diagnostics. The model/experiment comparison is therefore highly constrained, allowing the origin of discrepancies to be probed in unprecedented detail. Measurements were made of the absolute densities and kinetics of O2 in the X, a and b states, and O 3P atoms, using a combination of synchrotron vacuum ultraviolet absorption, cavity ringdown spectroscopy and optical emission (visible and infrared). These results show the importance of gas heating and surface reactions, as well as charged and neutral gas phase reactive collisions.
A comprehensive diagnostic study of a DC positive column in O2: a test-bed for models of plasmas in a diatomic gas
- Booth Jean-Paul
- Chatterjee Abhyuday
- Guaitella Olivier
- de Oliveira N.
- Nahon L.
- Lopaev Dmitry
- Zyryanov Sergey
- Voloshin Dmitry
- Rakhimova Tatyana
, 2019.
Vacuum ultraviolet absorption spectroscopy of oxygen discharges
- Booth Jean-Paul
- Chatterjee Abhyuday
- Guaitella Olivier
- de Oliveira N.
- Nahon L.
- Lopaev Dmitry
- Zyruyanov S.
- Rakhimova Tatyana
, 2019. Electrical discharges in oxygen gas are widespread in nature and occur in many plasma applications, including surface treatment and plasma medicine. They are also an ideal archetype for the understanding of molecular plasmas, showing the effects of dissociation/surface recombination, electron attachment, high densities of molecular and atomic metastable states, vibrational excitation and gas heating. Nevertheless, many uncertainties remain about the cross-section and reaction sets, as well as the surface processes, all essential for reliable modelling. We used the unique DESIRS vacuum ultraviolet beamline at synchrotron SOLEIL to perform absorption spectroscopy in the 120-200nm range. Measurements were made in a DC positive column in pure O2. This provides a uniform plasma column with constant reduced field over a wide range of gas pressure and electron density (pressure 0.2-10 Torr, current 5-40 mA), ideal for model validation. The Fourier-Transform branch was used to record absorption spectra with a resolution of 106, giving complete high-resolution spectra of O2 in the X, a and b states. The absorption cross-sections of O2 X and a are known [1] (although the a state absolute cross-section was only measured once in 1973 and at low resolution), allowing absolute densities to be determined. We analysed the complex rotational structure of the (4pπ1Σu b1g ).band at 131.3nm , and derived the first absolute absorption cross-sections using a combination of ab-initio calculations and absolute emission spectrometry, thus allowing the first determination of the absolute density of this state. Using the monochromatic branch of the VUV beamline we performed time-resolved measurements of O2 X and a during full and partial modulation of the discharge current, probing their creation and loss kinetics in the gas phase and on the tube surface. The recovery of the O2 X density in the afterglow shows components with distinct time constants, allowing the O atom and O2 a absolute densities to be calibrated.
Electrodynamics coupling between high and low latitudes recent advances in the framework of ISWI network
- Amory-Mazaudier Christine
, 2019.

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