Electron energy distribution function in decaying nitrogen plasmas

Abstract

The electron energy distribution function (EEDF) in decaying nitrogen plasmas is investigated numerically. The comparison of the calculated and experimentally measured EEDF allows a correction to be made to the cross sectional magnitude for electron scattering from vibrationally excited molecules. The influence of electron-electron (e-e) collisions on the EEDF is investigated. It is shown that e-e collisions may have a strong influence on the EEDF in decaying plasmas even at very low degrees of ionization (2*10-6).

LXCat: an Open‐Access, Web‐Based Platform for Data Needed for Modeling Low Temperature Plasmas

“…Rather, it is specific to the treatment used in ''EEDF'' which describes the multiple excitation/deexcitation processes in electron collisions with molecules having a thermal rotational distribution. A compact form of the collision operator for these conditions was derived in references, [108,109] and a similar expression was recently derived by Ridenti et al [79] Similarly, the rotational cross sections in the ''EEDF'' data bank for H 2 , N 2 , and CO (soon to be available through LXCat) should only be used when rotational processes are treated in the same way as in the ''EEDF'' package. See the Technical Note by AP Napartovich et al on the LXCat site http://www.…”

Non-equilibrium vibrational and electron energy distributions functions in atmospheric nitrogen ns pulsed discharges and μs post-discharges: the role of electron molecule vibrational excitation scaling-laws

“…Similarly, the scant experimental information on eedf emphasizes the post-discharge regime. Different sets of cross sections as well as different forms of non-equilibrium vibrational distributions were used by Dyatko et al [27,28] to reproduce experimental vibrational temperatures in low pressure nitrogen afterglows. More recently Dyatko et al have developed a complete plasma kinetic model determining the cross sections for electronic excitation for v > 0 shifting the known cross sections for the ground vibrational level and making use of Franck Condon factors [29].…”

Bistable solutions for the electron energy distribution function in electron swarms in xenon: a comparison between the results of first-principles particle simulations and conventional Boltzmann equation analysis

“…As a rule (BOLSIG+ [30], EEDF [31,32]), it is neglected assuming that ν ν ≪ , the time derivative in equation (7) …”

“…The steady-state equation is solved by an iteration method similar to that in [32,33]. The initial ε ( ) f 0 is assumed to be the Maxwellian with a given electron temperature T e0 .…”