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Pitchford L.C.,Toulouse 1 University Capitole | Alves L.L.,University of Lisbon | Bartschat K.,Drake University | Biagi S.F.,University of Liverpool | And 9 more authors.
Journal of Physics D: Applied Physics | Year: 2013

This paper describes work done in the context of the Gaseous Electronics Conference (GEC) Plasma Data Exchange Project (PDEP) as discussed in the preface to this cluster issue. The purposes of this paper and its companion papers are to compare sets of cross sections for electron scattering from ground-state noble gas atoms in the energy range from thermal to about 1 keV and to comment on their applicability for plasma modelling. To these ends, we present in this paper intercomparisons of the nine independently derived sets of cross sections for electron scattering from ground-state argon atoms that have been posted in databases on the LXCat open-access website (www.lxcat.laplace.univ-tlse.fr). We show electron transport, excitation and ionization coefficients (swarm parameters) calculated using these cross section data in Boltzmann solvers and we compare calculated values with measurements. For the most part, the cross section sets have been compiled by co-authors on this paper and appendices giving details about how the various cross sections datasets were compiled have been written by the individual co-authors. Additional appendices discuss our criteria for selection of experimental data to be included in the comparisons and give a brief overview of the methods used here for solving the Boltzmann equation. © 2013 IOP Publishing Ltd. Source


Bordage M.C.,Toulouse 1 University Capitole | Biagi S.F.,University of Liverpool | Alves L.L.,University of Lisbon | Bartschat K.,Drake University | And 6 more authors.
Journal of Physics D: Applied Physics | Year: 2013

This paper, the third in a series of three, describes work carried in the context of Plasma Data Exchange Project of the Gaseous Electronics Conference (PDEP-GEC) to compare electron collision cross-sections sets from ground-state, noble gases atoms and to check their consistency with measured swarm parameters. Such consistency is a minimum requirement if the cross-section data are to be used for modelling low-temperature plasmas. In this paper, we present intercomparisons of the independently compiled sets of electron cross-sections from ground-state, neutral Kr and Xe atoms presently available on the LXCat open-access website (www.lxcat.laplace.univ-tlse.fr). Swarm parameters (reduced mobility, characteristic energy, reduced longitudinal diffusion coefficient, reduced ionization coefficient) calculated in a Boltzmann solver or Monte Carlo simulation using these cross-sections sets are compared with experimental data, also available online on the LXCat site. © 2013 IOP Publishing Ltd. Source


Alves L.L.,University of Lisbon | Bartschat K.,Drake University | Biagi S.F.,University of Liverpool | Bordage M.C.,Toulouse 1 University Capitole | And 8 more authors.
Journal of Physics D: Applied Physics | Year: 2013

This paper is the second of a series of four reports, describing work carried in 2011 in the context of the Plasma Data Exchange Project with the Gaseous Electronics Conference, devoted to intercomparisons between different sets of electron-neutral scattering cross sections from ground-state noble gas atoms, in the energy range from thermal to about 1 keV. The present work compares cross section sets for helium and neon, determined independently, which are available on the open access LXCat website (www.lxcat.laplace.univ-tlse.fr/ ). The cross sections are used as input data in an electron Boltzmann solver or in Monte Carlo simulations, to calculate different swarm parameters (transport parameters and rate coefficients). The calculated quantities are compared with measurements to assess the quality of the cross sections in providing data for modelling low-temperature plasmas or analysing experiments. The paper includes several appendices prepared by co-authors to the work, presenting details on how the various cross section datasets were compiled or evaluated. © 2013 IOP Publishing Ltd. Source


Morgan W.L.,Kinema Research and Software | Rosocha L.A.,LCC
International Journal of Plasma Environmental Science and Technology | Year: 2013

Our recent experiments and analyses have demonstrated the possibility of producing supercritical water at high temperatures and densities using a short pulse electric surface discharge in saline solutions. The electrical conductivity of an electrolyte is far greater at the liquid surface than is the bulk conductivity. A short pulse (10 s-100 s ns), high voltage and current surface discharge will then ablate liquid layers, much like laser ablation, driving the ablated fluid to super critical temperatures, pressures and densities above the saturation line, as is found with exploding wires in water. We discuss the experiments, theory, and applications herein. Source


Pancheshnyi S.,CNRS LAPLACE Lab | Biagi S.,University of Liverpool | Bordage M.C.,CNRS LAPLACE Lab | Hagelaar G.J.M.,CNRS LAPLACE Lab | And 3 more authors.
Chemical Physics | Year: 2012

LXCat is a dynamic, open-access, website for collecting, displaying, and downloading ELECtron SCATtering cross sections and swarm parameters (mobility, diffusion coefficient, reaction rates, etc.) required for modeling low temperature, non-equilibrium plasmas. Contributors set up individual databases, and the available databases, indicated by the contributor's chosen title, include mainly complete sets of electron-neutral scattering cross sections, although the option for introducing partial sets of cross sections exists. A database for measured swarm parameters is also part of LXCat, and this is a growing activity. On-line tools include options for browsing, plotting, and downloading cross section data. The electron energy distribution functions (edfs) in low temperature plasmas are in general non-Maxwellian, and LXCat provides an option for execution of an on-line Boltzmann equation solver to calculate the edf in homogeneous electric fields. Thus, the user can obtain electron transport and rate coefficients (averages over the edfs) in pure gases or gas mixtures over a range of values of the reduced electric fields strength, E/N, the ratio of the electric field strength to the neutral density, using cross sections from the available databases. New contributors are welcome and anyone wishing to create a database and upload data can request a username and password. LXCat is part of a larger, community-wide effort aimed at collecting, evaluating, and sharing data relevant to modeling low temperature plasmas. To illustrate the utility of LXCat in this context, we compare electron swarm parameters in argon calculated using the different compilations of cross sections presently available on LXCat. These compilations include quite different groupings of excited states, yet lead to swarm parameters in good agreement. LXCat is available at http://www.lxcat.laplace.univ-tlse.fr. © 2011 Elsevier B.V. All rights reserved. Source

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