Regular Article - Plasma Physics
Effective ionization coefficients for low current dc discharges in alcohol vapours at low pressure
Institute of Physics, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia
2 School of Engineering, Ulster University, BT37 0QB, Jordanstown, Co. Antrim, UK
3 Serbian Academy for Sciences and Arts, Knez Mihailova 35, 11001, Belgrade, Serbia
Accepted: 26 March 2021
Published online: 29 June 2021
This paper presents results for effective ionisation coefficients (, N—gas density) obtained from the breakdown voltage and emission profile measurements in low-pressure dc discharges in vapours of alcohols: methanol, ethanol, isopropanol, and n-butanol. Our results for are determined from the axial emission profiles in low-current Townsend discharge and lay in the interval of reduced electric field E/N (E—electric field, N—gas density), from 1 kTd to 8.8 kTd. We also give a comparison of our experimental results with those from the available literature. Our data cover the high E/N range of the standard operating conditions and in the region where other data are available we have a good agreement.
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