The B-Spline R-Matrix Method for Electron and Photon Collisions With Atoms and Ions

Zatsarinny, Oleg; Bartschat, Klaus

doi:10.1142/9789812772442_0030

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“…Furthermore, it considers energetically higher states than the 1s and 2p excited states as one lumped state Ar * [hl] with a statistical weight of 289. The statistical weight of the lumped state Ar * [hl] is determined taking into account all levels higher than the 2p levels for which electron-collision cross section data are available from the study of Zatsarinny et al [43,44].…”

Section: Description Of the Rkmmentioning

confidence: 99%

“…To determine the rate coefficients for elastic electron collisions and electron-impact excitation processes up to around 200 eV and 300 eV of the kinetic electron energy U kin , respectively, the collision cross sections reported in [43,44] were utilised. For higher U kin , the cross sections were mostly determined following Bethe approximation [47], except for elastic collisions and excitation processes of ground state argon atoms, where the data from [46] was considered.…”

Section: Description Of the Rkmmentioning

confidence: 99%

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Extended reaction kinetics model for non-thermal argon plasmas and its test against experimental data

Stankov

Becker²,

Hoder³

et al. 2022

Plasma Sources Sci. Technol.

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An extended reaction kinetics model (RKM) suitable for the analysis of weakly ionised, non-thermal argon plasmas with gas temperatures around 300K at sub-atmospheric and atmospheric pressures is presented. It considers 23 different species including electrons as well as the ground state atom, an atomic and molecular ion, four excited molecular states, and 15 excited atomic states of argon, where all individual 1s and 2p states (in Paschen notation) are included as a separate species. This 23-species RKM involves 409 collision processes and radiative transitions and recent electron collision cross section data. It is evaluated by means of results of time- and space-dependent fluid modelling of argon discharges and their comparison with measured data for two different dielectric barrier discharge configurations as well as a micro-scaled atmospheric-pressure plasma jet setup. The results are also compared with those obtained by use of a previously established 15-species RKM involving only the two lumped 2p states 2p10...5 and 2p'4...1. It is found that the 23-species RKM shows generally better agreement with experimental data and provides more options for direct comparison with measurements than the frequently used 15-species RKM.

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Section: Description Of the Rkmmentioning

confidence: 99%