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Title: Investigation of the short argon arc with hot anode. II. Analytical model

Abstract

A short atmospheric pressure argon arc is studied numerically and analytically. In a short arc with an inter-electrode gap of several millimeters, non-equilibrium effects in plasma play an important role in operation of the arc. High anode temperature leads to electron emission and intensive radiation from its surface. A complete, self-consistent analytical model of the whole arc comprising of models for near-electrode regions, arc column, and a model of heat transfer in cylindrical electrodes was developed. The model predicts the width of non-equilibrium layers and arc column, voltages and plasma profiles in these regions, and heat and ion fluxes to the electrodes. Parametric studies of the arc have been performed for a range of the arc current densities, inter-electrode gap widths, and gas pressures. The model was validated against experimental data and verified by comparison with numerical solution. In conclusion, good agreement between the analytical model and simulations and reasonable agreement with experimental data were obtained.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Keiser Univ., Fort Lauderdale, FL (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1419799
Alternate Identifier(s):
OSTI ID: 1417714
Grant/Contract Number:
AC02-09CH11466
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Khrabry, A., Kaganovich, I. D., Nemchinsky, V., and Khodak, A. Investigation of the short argon arc with hot anode. II. Analytical model. United States: N. p., 2018. Web. doi:10.1063/1.5007084.
Khrabry, A., Kaganovich, I. D., Nemchinsky, V., & Khodak, A. Investigation of the short argon arc with hot anode. II. Analytical model. United States. doi:10.1063/1.5007084.
Khrabry, A., Kaganovich, I. D., Nemchinsky, V., and Khodak, A. Mon . "Investigation of the short argon arc with hot anode. II. Analytical model". United States. doi:10.1063/1.5007084.
@article{osti_1419799,
title = {Investigation of the short argon arc with hot anode. II. Analytical model},
author = {Khrabry, A. and Kaganovich, I. D. and Nemchinsky, V. and Khodak, A.},
abstractNote = {A short atmospheric pressure argon arc is studied numerically and analytically. In a short arc with an inter-electrode gap of several millimeters, non-equilibrium effects in plasma play an important role in operation of the arc. High anode temperature leads to electron emission and intensive radiation from its surface. A complete, self-consistent analytical model of the whole arc comprising of models for near-electrode regions, arc column, and a model of heat transfer in cylindrical electrodes was developed. The model predicts the width of non-equilibrium layers and arc column, voltages and plasma profiles in these regions, and heat and ion fluxes to the electrodes. Parametric studies of the arc have been performed for a range of the arc current densities, inter-electrode gap widths, and gas pressures. The model was validated against experimental data and verified by comparison with numerical solution. In conclusion, good agreement between the analytical model and simulations and reasonable agreement with experimental data were obtained.},
doi = {10.1063/1.5007084},
journal = {Physics of Plasmas},
number = 1,
volume = 25,
place = {United States},
year = {Mon Jan 22 00:00:00 EST 2018},
month = {Mon Jan 22 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on January 22, 2019
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