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Title: Reverse battery model for anodic arc discharges near atmospheric pressure

Abstract

In this study, the macroscopic electrical parameters of anodic arc discharges performed with solid carbon and molybdenum anodes are described in terms of an equivalent circuit. The proposed 1D model shows that the plasma volume behaves as a dissipative medium combined with self-generated voltage from the plasma sheaths. We test this model by fitting virtual circuits of resistors and batteries to the measured voltage–current (V–I) characteristics representative of atmospheric arc processes (300 and 500 Torr He), resulting in the identification of two phenomena relevant for arc technology. First, steady DC arc experiments show that a minimal arc voltage (V ≈ 20–30 V) or threshold voltage is necessary to keep the plasma arc on. Second, we prove that pulsed arc discharges excited with rectangular current waveforms (1–5 Hz) are never extinguished but remain ignited during the inactive time of the pulse as long as the aforementioned threshold voltage is maintained. In summary, an atmospheric anodic arc discharge with solid electrodes consumes electrical power as a voltage source opposed to the external voltage supply together with a resistor that accounts for the plasma impedance. This approach permits us to estimate basic plasma parameters from simple electrical diagnostics, as well as to predictmore » how power consumption is distributed within an anodic arc and to understand dynamics of arc plasmas excited by periodic signals.« less

Authors:
ORCiD logo [1];  [1];  [2];  [1]
  1. George Washington Univ., Washington, DC (United States)
  2. Tech-X Corporation, Boulder, CO (United States)
Publication Date:
Research Org.:
Tech-X Corporation, Boulder, CO (United States); George Washington Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
OSTI Identifier:
1595718
Grant/Contract Number:  
SC0015767; 1747760
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. D, Applied Physics
Additional Journal Information:
Journal Volume: 52; Journal Issue: 48; Journal ID: ISSN 0022-3727
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; anodic arc discharge; circuit model; atmospheric plasma; pulsed waveform; voltage–current curve

Citation Formats

Corbella, Carles, Portal, Sabine, Kundrapu, Madhusudhan N., and Keidar, Michael. Reverse battery model for anodic arc discharges near atmospheric pressure. United States: N. p., 2019. Web. https://doi.org/10.1088/1361-6463/ab3c71.
Corbella, Carles, Portal, Sabine, Kundrapu, Madhusudhan N., & Keidar, Michael. Reverse battery model for anodic arc discharges near atmospheric pressure. United States. https://doi.org/10.1088/1361-6463/ab3c71
Corbella, Carles, Portal, Sabine, Kundrapu, Madhusudhan N., and Keidar, Michael. Thu . "Reverse battery model for anodic arc discharges near atmospheric pressure". United States. https://doi.org/10.1088/1361-6463/ab3c71. https://www.osti.gov/servlets/purl/1595718.
@article{osti_1595718,
title = {Reverse battery model for anodic arc discharges near atmospheric pressure},
author = {Corbella, Carles and Portal, Sabine and Kundrapu, Madhusudhan N. and Keidar, Michael},
abstractNote = {In this study, the macroscopic electrical parameters of anodic arc discharges performed with solid carbon and molybdenum anodes are described in terms of an equivalent circuit. The proposed 1D model shows that the plasma volume behaves as a dissipative medium combined with self-generated voltage from the plasma sheaths. We test this model by fitting virtual circuits of resistors and batteries to the measured voltage–current (V–I) characteristics representative of atmospheric arc processes (300 and 500 Torr He), resulting in the identification of two phenomena relevant for arc technology. First, steady DC arc experiments show that a minimal arc voltage (V ≈ 20–30 V) or threshold voltage is necessary to keep the plasma arc on. Second, we prove that pulsed arc discharges excited with rectangular current waveforms (1–5 Hz) are never extinguished but remain ignited during the inactive time of the pulse as long as the aforementioned threshold voltage is maintained. In summary, an atmospheric anodic arc discharge with solid electrodes consumes electrical power as a voltage source opposed to the external voltage supply together with a resistor that accounts for the plasma impedance. This approach permits us to estimate basic plasma parameters from simple electrical diagnostics, as well as to predict how power consumption is distributed within an anodic arc and to understand dynamics of arc plasmas excited by periodic signals.},
doi = {10.1088/1361-6463/ab3c71},
journal = {Journal of Physics. D, Applied Physics},
number = 48,
volume = 52,
place = {United States},
year = {2019},
month = {9}
}

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Works referenced in this record:

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    Works referencing / citing this record:

    Few-layer flakes of Molybdenum Disulphide produced by anodic arc discharge in pulsed mode
    journal, December 2019

    • Corbella, Carles; Portal, Sabine; Saadi, M. A. S. R.
    • Plasma Research Express, Vol. 1, Issue 4
    • DOI: 10.1088/2516-1067/ab612b