Plasma and Fusion Research

Volume 3, 007 (2008)

Rapid Communications

Effect of Micro Hydrodynamic Flow in Microgap Discharge at Atmospheric Pressure
Seiji MUKAIGAWA, Kota NAWA, Hiroshi ITO, Koichi TAKAKI and Tamiya FUJIWARA
Department of Electrical and Electronic Engineering, Iwate University, Morioka 020-8551, Japan
(Received 30 November 2007 / Accepted 26 December 2007 / Published 6 February 2008)

Abstract

The effect of gas flow on the characteristics of a microgap discharge was investigated experimentally. In a gap length of 0.7 mm, the spatial structure and spectrum of light emitted from the discharges in helium gas were observed to be changed with the gas flow velocity. The transition of the discharge from a transversally uniform structure to a silent discharge structure in a high flow velocity region is found to be caused by air contamination in the gas flow channel. The edge effect on the transition is confirmed from the light emission pattern of the discharge.

Keywords

micro plasma, dielectric barrier discharge, gas flow, discharge transition

DOI: 10.1585/pfr.3.007

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This paper may be cited as follows:

Seiji MUKAIGAWA, Kota NAWA, Hiroshi ITO, Koichi TAKAKI and Tamiya FUJIWARA, Plasma Fusion Res. 3, 007 (2008).