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Title: Effects of discharge voltage waveform on the discharge characteristics in a helium atmospheric plasma jet

Abstract

We present here an analysis of the discharge characteristics of a He plasma jet operating under three different types of applied voltage waveform: (a) a μs-pulse voltage waveform with a slow voltage rise time, (b) ns-pulse, and (c) rectangular voltage waveforms with fast voltage rise time. Optical emission measurements show that the application of a voltage with a fast voltage rise time induces rapid discharge growth and, consequently, produces an abundance of energetic electrons, which in turn leads to high optical emission from the O atoms. We also estimate the optical emission efficiency of the O atom (η{sub o}), which corresponds roughly to the production efficiency of the reactive O species. η{sub o} increases with increasing applied voltage, and the highest value of η{sub o} is obtained in the shortest pulse discharge, which was ignited by a ns-pulse voltage waveform with a fast voltage rise time and short pulse width.

Authors:
; ;  [1]
  1. Joining and Welding Research Institute, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
Publication Date:
OSTI Identifier:
22402862
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; EFFICIENCY; ELECTRIC DISCHARGES; ELECTROMAGNETIC PULSES; HELIUM; PHOTON EMISSION; PLASMA JETS; PLASMA POTENTIAL; PULSE RISE TIME; TAIL ELECTRONS; WAVE FORMS

Citation Formats

Uchida, Giichiro, Takenaka, Kosuke, and Setsuhara, Yuichi. Effects of discharge voltage waveform on the discharge characteristics in a helium atmospheric plasma jet. United States: N. p., 2015. Web. doi:10.1063/1.4918546.
Uchida, Giichiro, Takenaka, Kosuke, & Setsuhara, Yuichi. Effects of discharge voltage waveform on the discharge characteristics in a helium atmospheric plasma jet. United States. https://doi.org/10.1063/1.4918546
Uchida, Giichiro, Takenaka, Kosuke, and Setsuhara, Yuichi. 2015. "Effects of discharge voltage waveform on the discharge characteristics in a helium atmospheric plasma jet". United States. https://doi.org/10.1063/1.4918546.
@article{osti_22402862,
title = {Effects of discharge voltage waveform on the discharge characteristics in a helium atmospheric plasma jet},
author = {Uchida, Giichiro and Takenaka, Kosuke and Setsuhara, Yuichi},
abstractNote = {We present here an analysis of the discharge characteristics of a He plasma jet operating under three different types of applied voltage waveform: (a) a μs-pulse voltage waveform with a slow voltage rise time, (b) ns-pulse, and (c) rectangular voltage waveforms with fast voltage rise time. Optical emission measurements show that the application of a voltage with a fast voltage rise time induces rapid discharge growth and, consequently, produces an abundance of energetic electrons, which in turn leads to high optical emission from the O atoms. We also estimate the optical emission efficiency of the O atom (η{sub o}), which corresponds roughly to the production efficiency of the reactive O species. η{sub o} increases with increasing applied voltage, and the highest value of η{sub o} is obtained in the shortest pulse discharge, which was ignited by a ns-pulse voltage waveform with a fast voltage rise time and short pulse width.},
doi = {10.1063/1.4918546},
url = {https://www.osti.gov/biblio/22402862}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 15,
volume = 117,
place = {United States},
year = {Tue Apr 21 00:00:00 EDT 2015},
month = {Tue Apr 21 00:00:00 EDT 2015}
}