Calculation of the Effective Ionization Rate in Air by Considering Electron Detachment From Negative Ions

Author

Chachereau, Alise ; Pancheshnyi, S.

Author_Institution

High Voltage Lab., ETH Zurich, Zurich, Switzerland

Volume

42

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

3328

Lastpage

3338

Abstract

The effective Townsend ionization coefficient in dry air at different pressures and temperatures is calculated by considering ionization by direct electron impact, attachment of electrons to molecular oxygen, simplified negative ion kinetics, and detachment of electrons from negative ions in collisions with heavy neutrals. Effect of electron detachment from negative ions created by primary and secondary electron avalanches propagating in a uniform electric field in air at different pressures and temperatures and its contribution into the effective ionization rate are analyzed.

Keywords

Townsend discharge; electron detachment; electron impact ionisation; negative ions; plasma collision processes; plasma pressure; plasma temperature; plasma transport processes; Townsend ionization coefficient; electron detachment; electron impact ionization; heavy neutrals; ionization rate; negative ions; primary electron avalanches; secondary electron avalanches; simplified negative ion kinetics; uniform electric field; Gases; Ionization; Kinetic theory; Mathematical model; Plasma temperature; Temperature measurement; Air; effective ionization rate; electron detachment; electron swarm parameters; ion kinetics;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2014.2354676

Filename

6909074