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Determination of electron density in a wall stabilized Ar-CO\({\mathsf{_2}}\) thermal plasma

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Abstract.

The electron density is measured in an argon-CO2 thermal plasma by optical emission spectroscopy. Electron density is deduced from the Stark broadening of the argon line and hydrogen (H\(_{\alpha}\)) line. Different theories are used and compared. The effect of CO2 molecule upon this plasma is studied as a function of the Ar-CO2 mixture composition and discharge current. The electron density is ranging from 3 x 1021 m-3 to 5.6 x 1022 m-3. The influence of the arc confinement is studied and the electron density gradients are evaluated. Departure from local thermal equilibrium is also discussed.

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Authors and Affiliations

  1. Laboratoire Arc Électrique et Plasmas Thermiques, Université Blaise Pascal, 24 avenue des Landais, 63177, Aubière Cedex, France

    S. Brugeat

  2. Département Mesures Physiques, IUT d’Aubière, Université d’Auvergne, 24 avenue des Landais, 63172, Aubière Cedex, France

    H. Coitout

Authors
  1. S. Brugeat
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  2. H. Coitout
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Correspondence to H. Coitout.

Additional information

Received: 5 September 2003, Published online: 21 October 2003

PACS:

52.70.Kz Optical (ultraviolet, visible, infrared) measurements - 52.80.Mg Arcs; sparks; lightning; atmospheric electricity

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Brugeat, S., Coitout, H. Determination of electron density in a wall stabilized Ar-CO\({\mathsf{_2}}\) thermal plasma. Eur. Phys. J. D 28, 101–107 (2004). https://doi.org/10.1140/epjd/e2003-00290-6

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  • DOI: https://doi.org/10.1140/epjd/e2003-00290-6

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