NDLI: Plasma Characteristics Due to Helium and Oxygen Mixing in Argon-Based Atmospheric Plasmas

Content Provider	IEEE Xplore Digital Library
Author	Choe, W. Moon, S.Y. Han, J.W. Kim, D.B. Lee, J.K.
Copyright Year	2005
Description	Author affiliation: Korea Adv. Inst. of Sci. & Technol., Daejeon (Choe, W.; Moon, S.Y.; Han, J.W.; Kim, D.B.; Lee, J.K.)
Abstract	Summary form only given. Argon, helium, and oxygen gases are frequently used as a supply gas for generating stable plasmas and/or for aiding industrial applications of atmospheric plasmas. Since each gas demonstrates its own unique characteristics, choice of the gas may be important for a particular process due to the merits and drawbacks for the application. In this paper, results are presented first about the plasma characteristics based on the pure argon or helium plasmas produced in the ambient air, and then change of the characteristics brought about by mixing of He and $O_{2}$ gases as an additive gas to the Ar plasmas. Electrical and optical spectroscopic diagnostics show the variation of plasma characteristics such as breakdown voltage, I-V curve, rotation temperature, and spatial uniformity of the plasma. In the case of 10 slm flow rate of Ar and He, respectively, both breakdown voltage $(V_{b})$ and rotational temperature $(T_{rot})$ significantly decreased from 430 V to 300 V and from 470 K to 360 K. On the other hand, in the case of $O_{2}$ (10 sccm) mixing in Ar (10 slm), $V_{b}$ and $T_{rot}$ increased from 435 V to 450 V and from 490 K to 570 K. These changes can be explained by understanding their gas characteristics. In addition, increase of the additive gas amount resulted in deterioration of the spatial uniformity of the plasma in all cases. The experimental results illustrate that there exists a gas mixing ratio for optimum plasma condition, and it suggests that control of the atmospheric plasma characteristics can be possible to some extent by gas mixing for particular applications
Sponsorship	Plasma Sci. Appl. Comm. IEEE Nucl. Plasma Sci. Soc.
Starting Page	231
Ending Page	231
File Size	986076
Page Count	1
File Format	PDF
ISBN	0780393007
ISSN	07309244
DOI	10.1109/PLASMA.2005.359291
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma properties Helium Oxygen Plasma applications Plasma stability Argon Plasma diagnostics Plasma temperature Gases Gas industry
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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