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SPECTRAL CHARACTERISTICS OF A RADIOFREQUENCY NITROGEN PLASMA JET CONTINUOUSLY PASSING FROM LOW TO ATMOSPHERIC PRESSURE

G. Dinescu1,* , S. Vizireanu1, C. Petcu1, B. Mitu1, M. Bazavan2, I. Iova2

Affiliation

  1. National Institute for Laser, Plasma and Radiation Physics, PO Box- MG 36, Bucharest, Romania
  2. Department of Physics, University of Bucharest, Magurele, Romania

Abstract

We report and discuss the characteristics of the optical emission of a radiofrequency (13.56 MHz) expanding plasma generated in nitrogen in a double chamber configuration, when the discharge passes continuously from the low pressure (10-1 mbar) to the high pressure region (760 mbar), at constant gas mass flow. The pressure increase leads to a sudden change in plasma aspect, occurring at intermediate pressure of 200-400 torr. The plasma temperature estimation from spectral measurements indicates that the change in the aspect is accompanied by a sudden decrease of the plasma temperature..

Keywords

Radiofrequency discharges, Atmospheric pressure plasmas, Plasma sources, Nitrogen discharges.

Submitted at: Feb. 17, 2005
Accepted at: Sept. 22, 2005

Citation

G. Dinescu, S. Vizireanu, C. Petcu, B. Mitu, M. Bazavan, I. Iova, SPECTRAL CHARACTERISTICS OF A RADIOFREQUENCY NITROGEN PLASMA JET CONTINUOUSLY PASSING FROM LOW TO ATMOSPHERIC PRESSURE, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 5, pp. 2477-2480 (2005)