The LXCat project: Electron scattering cross sections and swarm parameters for low temperature plasma modeling

Pancheshnyi, Sergey; Biagi, S.; Bordage, Marie‐Claude; Hagelaar, Gerjan; Morgan, W. L.; Phelps, A. V.; Pitchford, L. C.

doi:10.1016/j.chemphys.2011.04.020

Cited by 264 publications

(243 citation statements)

References 37 publications

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“…The cross sections and threshold energies used for these reactions are adopted from the Refs. [41][42][43][44] and downloaded from LXCat database [45].…”

Section: Simulation Methodsmentioning

confidence: 99%

“…The cross sections for all reactions are adopted from Refs. [41][42][43][44], and are downloaded from the LXCat database [45]. On the other hand, both the excitation and ionization rates for the O 2 component show discontinuous distributions on the bead surfaces, except for the top surface of central bead 4, as shown in Figure 5b1-b2.…”

Section: Effect Of Driving Voltagementioning

confidence: 99%

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Mode Transition of Filaments in Packed-Bed Dielectric Barrier Discharges

et al. 2018

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Abstract:We investigated the mode transition from volume to surface discharge in a packed bed dielectric barrier discharge reactor by a two-dimensional particle-in-cell/Monte Carlo collision method. The calculations are performed at atmospheric pressure for various driving voltages and for gas mixtures with different N 2 and O 2 compositions. Our results reveal that both a change of the driving voltage and gas mixture can induce mode transition. Upon increasing voltage, a mode transition from hybrid (volume+surface) discharge to pure surface discharge occurs, because the charged species can escape much more easily to the beads and charge the bead surface due to the strong electric field at high driving voltage. This significant surface charging will further enhance the tangential component of the electric field along the dielectric bead surface, yielding surface ionization waves (SIWs). The SIWs will give rise to a high concentration of reactive species on the surface, and thus possibly enhance the surface activity of the beads, which might be of interest for plasma catalysis. Indeed, electron impact excitation and ionization mainly take place near the bead surface. In addition, the propagation speed of SIWs becomes faster with increasing N 2 content in the gas mixture, and slower with increasing O 2 content, due to the loss of electrons by attachment to O 2 molecules. Indeed, the negative O − 2 ion density produced by electron impact attachment is much higher than the electron and positive O + 2 ion density. The different ionization rates between N 2 and O 2 gases will create different amounts of electrons and ions on the dielectric bead surface, which might also have effects in plasma catalysis.

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“…The cross sections and threshold energies used for these reactions are adopted from the Refs. [41][42][43][44] and downloaded from LXCat database [45].…”

Section: Simulation Methodsmentioning

confidence: 99%

Section: Effect Of Driving Voltagementioning

confidence: 99%

Mode Transition of Filaments in Packed-Bed Dielectric Barrier Discharges

et al. 2018

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“…"LXCat uses the key words "elastic" and "momentum" to refer to "elastic momentum transfer" and "effective momentum transfer" cross sections, respectively. A better choice of keywords would be "elastic" and "effective", and we (comment: Pancheshnyi et al) intend to phase in this change" [17].…”

Section: Cross Sectionsmentioning

confidence: 99%

“…The main challenge is to collect, compare and share the cross section data and decide which data set to use for a certain species. This procedure has been greatly simplified by the open-access Plasma Data Exchange Project LXCat [17], which provides in addition to cross section data also transport parameters and reaction rates as a function of the reduced electric field E/N, which is the ratio of the electric field strength to the gas particle number density.…”

Section: Introductionmentioning

confidence: 99%

METHES: A Monte Carlo collision code for the simulation of electron transport in low temperature plasmas

Rabie

Franck

2016

Computer Physics Communications

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“…These coefficients are obtained by suitable averaging over the electron energy distribution function (EEDF) computed using the freeware Boltzmann solver BOLSIGþ 40 with a cross-section set of 38 states presented in Ref. 26 and extracted from LXCAT, 41,42 and including electron-electron collisions. For all conditions, the excitation frequency remains smaller than the electron momentum transfer frequency.…”

Section: B Reactions Rate Coefficients and Transport Parametersmentioning

confidence: 99%

Electron confinement and heating in microwave-sustained argon microplasmas

Hoskinson

Gregório

Parsons

et al. 2015

Journal of Applied Physics

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We systematically measure and model the behavior of argon microplasmas sustained by a broad range of microwave frequencies. The plasma behavior exhibits two distinct regimes. Up to a transition frequency of approximately 4 GHz, the electron density, directly measured by Stark broadening, increases rapidly with rising frequency. Above the transition frequency, the density remains approximately constant near 5 × 1020 m–3. The electrode voltage falls with rising frequency across both regimes, reaching approximately 5 V at the highest tested frequency. A fluid model of the plasma indicates that the falling electrode voltage reduces the electron temperature and significantly improves particle confinement, which in turn increases the plasma density. Particles are primarily lost to the electrodes at lower frequencies, but dissociative recombination becomes dominant as particle confinement improves. Recombination events produce excited argon atoms which are efficiently re-ionized, resulting in relatively constant ionization rates despite the falling electron temperature. The fast rates of recombination are the result of high densities of electrons and molecular ions in argon microplasmas.

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The LXCat project: Electron scattering cross sections and swarm parameters for low temperature plasma modeling

Cited by 264 publications

References 37 publications

Mode Transition of Filaments in Packed-Bed Dielectric Barrier Discharges

Mode Transition of Filaments in Packed-Bed Dielectric Barrier Discharges

METHES: A Monte Carlo collision code for the simulation of electron transport in low temperature plasmas

Electron confinement and heating in microwave-sustained argon microplasmas

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