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Indexed by:期刊论文

Date of Publication:2009-03-16

Journal:APPLIED PHYSICS LETTERS

Included Journals:SCIE、EI、Scopus

Volume:94

Issue:11

ISSN No.:0003-6951

Key Words:argon; discharges (electric); equivalent circuits; plasma diagnostics; plasma production

Abstract:An atmospheric-pressure argon/oxygen needle plasma discharge is generated in a long dielectric tube and investigated with respect to its electrical characteristics and the production of oxygen atom by means of optical actinometry. The length of discharge column depends on the operating frequency and applied voltage of power supply, which is interpreted qualitatively with an equivalent circuit model. Moreover it is found that there exists an optimal value of oxygen concentration in the production of oxygen radicals. At last, the oxygen/argon plasma is employed to modify the interior surface of a fine quartz tube to demonstrate its potential applications.