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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:58 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Properties of a radiofrequency plasma jet discharge operated at low and atmospheric pressure
Authors:
M Teodorescu(1), E R Ionita(1), M Bazavan(2) , G. Dinescu(1)
Affiliation:
1. National Institute for Laser, Plasma and Radiation Physics, Magurele, PO Box Mg36, Bucharest, 077125 Romania
2. Physics Department, University of Bucharest, Magurele, 077125 Bucharest, Romania
E-mail
maximilian.teodorescu@infim.ro
Keywords:
bare electrode discharge, atmospheric pressure plasma, plasma jet
Abstract:
The present work describes the behavior of a radiofrequency plasma jet in Argon during continuous pressure increase from low to atmospheric pressure. The discharge is composed of two regions: an interelectrodic region situated between the powered electrode and the nozzle, and an outer region, expanding through the nozzle as a plasma jet.
The evolution of the discharge was studied by means of photographic, spectral and electrical measurements, all of which proved to be correlated at some level [1]. Varying the pressure from 10 mbar to atmospheric, different operating domains are observed, which produce modifications seen in both the electrical measurements and in the visual aspect of the discharge.
The results point out to a regime change of the jet discharge in a region between low pressure and atmospheric pressure, occurring in the interval 700-800 mbar.
From experimental spectra the rotational and electron temperature were extracted. They proved the continuous non-thermal operation of the plasma jet discharge for the entire pressure range.
References:
M. Teodorescu, M. Bazavan, E. R. Ionita and G. Dinescu, Characterization of an argon radiofrequency plasma jet discharge continuously passing from low to atmospheric pressure, Plasma Sources Sci. Technol. 21 (2012) 055010.
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