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Title: Experiment and modeling of an atmospheric pressure arc in an applied oscillating magnetic field

Abstract

A set of experiments are carried out to measure and understand the response of a free-burning atmospheric pressure carbon arc to applied transverse dc and ac magnetic fields. The arc is found to deflect parabolically for the dc field and assumes a growing sinusoidal structure for the ac field. A simple analytic two-parameter fluid model of the arc dynamics is derived, in which the arc response is governed by the arc jet originating at the cathode, with the applied JxB force balanced by inertia. Time variation of the applied field allows evaluation of the parameters individually. A fit of the model to the experimental data gives a value for the average jet speed an order of magnitude below Maecker's estimate of the maximum jet speed [H. Maecker, Z. Phys. 141, 198 (1955)]. An example industrial application of the model is considered. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1]
  1. Princeton Plasma Physics Lab, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
20216551
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 6; Other Information: PBD: Jun 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; OSCILLATIONS; ELECTRIC FIELDS; ELECTRIC ARCS; CARBON; PLASMA JETS; MATHEMATICAL MODELS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Karasik, Max, Roquemore, A. L., and Zweben, S. J. Experiment and modeling of an atmospheric pressure arc in an applied oscillating magnetic field. United States: N. p., 2000. Web. doi:10.1063/1.874115.
Karasik, Max, Roquemore, A. L., & Zweben, S. J. Experiment and modeling of an atmospheric pressure arc in an applied oscillating magnetic field. United States. doi:10.1063/1.874115.
Karasik, Max, Roquemore, A. L., and Zweben, S. J. Thu . "Experiment and modeling of an atmospheric pressure arc in an applied oscillating magnetic field". United States. doi:10.1063/1.874115.
@article{osti_20216551,
title = {Experiment and modeling of an atmospheric pressure arc in an applied oscillating magnetic field},
author = {Karasik, Max and Roquemore, A. L. and Zweben, S. J.},
abstractNote = {A set of experiments are carried out to measure and understand the response of a free-burning atmospheric pressure carbon arc to applied transverse dc and ac magnetic fields. The arc is found to deflect parabolically for the dc field and assumes a growing sinusoidal structure for the ac field. A simple analytic two-parameter fluid model of the arc dynamics is derived, in which the arc response is governed by the arc jet originating at the cathode, with the applied JxB force balanced by inertia. Time variation of the applied field allows evaluation of the parameters individually. A fit of the model to the experimental data gives a value for the average jet speed an order of magnitude below Maecker's estimate of the maximum jet speed [H. Maecker, Z. Phys. 141, 198 (1955)]. An example industrial application of the model is considered. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874115},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 6,
volume = 7,
place = {United States},
year = {2000},
month = {6}
}