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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:24 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Study of the Monochromatization effect of Kr-H2 gas mixture plasma in inductive magnetic field
Authors:
Catalina CIOBOTARU, Ion GRUIA
Affiliation:
1)National Institute R&D of Lasers, Plasma and Radiation Physics, Magurele, Romania
2) Faculty of Physics, University of Bucharest, Magurele, Romania
E-mail
ciobotaru_lc@yahoo.com; gruia_ion@yahoo.com
Keywords:
Monochromatization - effect: Krypton-Hydrogen plasma; Magnetic field
Abstract:
The monochromatization effect of visible light (or the M-effect), emitted from electronegative-electropositive gas mixture plasma, pointedly consists in significant reduction the emission spectrum of electropositive gas to one or a few very intense spectral lines in relation to all other ones. The M-effect has a general character, proved by his appearance not only in binary but also in multiple electronegative-electropositive gas mixtures, either in D.C. or A.C. discharges. The paper presents the influence of the application of an inductive magnetic field on the appearance conditions of quasi-monochrome light emitted by a RF low frequency krypton-hydrogen plasma discharge at a total pressure of gaseous mixture about tens of mbar, comparative with the situation when there is no applied magnetic field. The discharge was produced in a quartz tube with 16 mm inner diameter and 20 mm outer diameter respectively, between two identical wolfram-thorium cylinder electrodes of 12mm diameter, spaced at 6mm distance. The experimental discharge device can be pumped down up to a pressure of about 10– 4 mbar and then filled with various gas mixtures of spectral purity. Processing of the experimental data resulted in the obtaining of the plasma emission spectra of krypton mixed with small amount of hydrogen, for different values of the magnetic field and the electrical power dissipated in the discharge.The goal of this article is to elucidate how influences the magnetic field applied in the discharge the monocromatization degree of radiation that is emitted, and subsequent elementary processes occurring in plasma of krypton-hydrogen mixture.
References:
[1] Surdu-Bob CC, Musa G, J. of Physics D-Applied Physics, 41(17) 2008 2.104- 2108
[2] L.C.Ciobotaru, I.Gruia, Proceedings of the Romanian Academy Series A - Mathematics Physics Technical Sciences Information Science, 17(4) 2016 314-321
[3] I.Gruia, L.C.Ciobotaru, Romanian Reports in Physics, 69(2) 2017 409
Acknowledgement:
The authors thank the leadership of the Faculty of Physics in Bucharest that facilitated and supported the study.
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