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Study of A Nitrogen D.C. Plasma Torch at Different Pressures Using Optical and Thermal Diagnostics

  • J. M. Léger
  • J. F. Coudert
  • A. Grimaud
  • P. Fauchais
Conference paper

Abstract

This paper is devoted to the characterization of electrical arid thermal parameters of a d.c. plasma torch and the temperature measurements of the plasma jet at a pressure of 32.8 kPa, the working gas being nitrogen.

The optical diagnostic has been performed using emission spectroscopy measurements through the study of atomic lines of nitrogen or of the 0-0 band of the first negative system of N2+ with the help of a 2D Optical Multichannel Analyser (OMA) for signal detection. The spectroscopic measurements show non-equilibrium effects with significant differences between rotational, population and excitation temperatures. These differences are related to the measured steep electron density gradients.

Keywords

Nozzle Exit Plasma Torch Rotational Temperature Atomic Line Excitation Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Bibliographie

  1. /1/.
    P. Fauchais, J.F. Coudert, A. Vardelle, M. Vardelle, Diagnostics in Thermal Plasma Processing p. 349 in Plasma Diagnostics (Pub.) Academic Press (1989).Google Scholar
  2. /2/.
    J.F. Coudert, Ph. Roumilhac, A. Grimaud, P. Fauchais, ISPC9 Proceedings, (ed.) Prof. R. d’Aggostino, Univ. de Bari, Italie.Google Scholar
  3. /3/.
    E.L. Kosarev E. Pantos J. Phys. E. Sci. Instrum. Vol. 16, (1983)Google Scholar
  4. /4/.
    J.F. Coudert, P. Fauchais, ISPC7, Eindhoven, July 1985, Paper number P-9-5.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • J. M. Léger
    • 1
  • J. F. Coudert
    • 1
  • A. Grimaud
    • 1
  • P. Fauchais
    • 1
  1. 1.Laboratoire Céramiques Nouvelles URAUniversity of LimogesFrance

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