Plasma Study on Ionization of Flowing Gases by Direct Current Electric Discharge

Autor:	S. T. Wu, Hugh W. Coleman, Stelu Deaconu
Rok vydání:	2003
Předmět:	Materials science Physics::Plasma Physics Pulsed discharge ionization detector Brush discharge Aerospace Engineering Electric discharge Dielectric barrier discharge Plasma Atomic physics Discharge ionization detector Corona discharge Electric discharge in gases
Zdroj:	AIAA Journal. 41:633-640
ISSN:	1533-385X 0001-1452
DOI:	10.2514/2.2017
Popis:	A new design of a corona/thermionic-arc discharge ionization device was investigated experimentally. The device features a hollow (spiral filament) cathode-plane anode configuration and creates a negative point to plane corona discharge, which ionizes a flowing gas column. Multiple experimental runs have been performed in nitrogen, helium, and argon. The diagnostics of the plasma consisted of electron temperature, electron density, gas pressure, and cathode/gas temperature. The measurements show that the discharge plasma and the plume are in local thermal nonequilibrium, with typical electron temperatures being one order of magnitude higher than the gas temperature. The experimental plasma data and the analysis of the experimental results are presented. The analysis focuses on the comparison of the experimental data with the charge-drift theory of the corona discharge and on identifying the stabilizing factors of the discharge. Finally, an approximate predictive model for the electron density in the plume is proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::54c319c8986b999fd6c083346b2ea0d2 https://doi.org/10.2514/2.2017 Zobrazit plný text záznamu