Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-17T19:44:36.000Z Has data issue: false hasContentIssue false
  • English
  • Français

A study of physical processes in microplasma capillary discharges

Published online by Cambridge University Press:  28 October 2011

N. Denisova ,
E. Bogans ,
G. Revalde  and
Ja. Skudra
N. Denisova*
Affiliation:
Institute of Theoretical and Applied Mechanics, Institutskaya Str. 4/1, Novosibirsk, Russian Federation
E. Bogans
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raina Blvd. 19, Riga, Latvia
G. Revalde
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raina Blvd. 19, Riga, Latvia
Ja. Skudra
Affiliation:
Institute of Atomic Physics and Spectroscopy, University of Latvia, Raina Blvd. 19, Riga, Latvia
*
ae-mail: nvdenisova2011@mail.ru
Get access

Abstract

We continue the research of low-pressure capillary discharge lamps of 500 μm in radius in Ar/Hg, Kr/Hg and Xe/Hg mixtures. In the previous paper, an experimental approach which combines the optical emission spectroscopy (OES) and tomographic methods was developed to study the capillary discharge. The present work is focused on interpretation of the tomographic reconstruction results for understanding the physical processes occurring in a capillary plasma. Analyzing the results of reconstruction, it was concluded that the radial profiles of Ar, Kr and Xe emission coefficients are in a good agreement with the Schottky theory. According to the Schottky model, ionization processes in plasma are balanced by electrons and ions transfer to the wall due to ambipolar diffusion. Using the Schottky model, the electron temperature in an Ar/Hg capillary lamp was estimated. The value of the temperature was higher in comparison with that in a large-scale Ar/Hg discharge. A simplified model describing the excited atomic states kinetics is analyzed. This model agrees with all radial profiles of emission coefficients, obtained by using a tomography approach, except one for mercury line of 546.07 nm in the Ar/Hg capillary lamp. We suppose that the simplified model did not include the processes which were important for the mercury population balance in Ar/Hg mixture. It was proposed that the transfer of high-excited mercury atoms may play an appreciable role in the Ar/Hg capillary discharge.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 56 , Issue 2: Topical Issue: 18th International Colloquium on Plasma Processes (CIP 2011) , November 2011 , 24003
Copyright
© EDP Sciences, 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Iza, F., Kim, G.J., Lee, J.K., Walsh, J.L., Zhang, Y.T., Kong, M.G., Plasma Process. Polym. 5, 322 (2008)CrossRef
Becker, K.H., Kersten, H., Hopwood, J., Lopez, J.L., Eur. Phys. J. D 60, 437 (2010)CrossRef
Bogans, E., Revalde, G., Skudra, A., Sholupov, S., Svagere, A., in Proc. of 11th Int. Symp. on the Science and Technology of Light Sources (LS-11), Shanghai, China, 2007, p. 615
Denisova, N., Gavare, Z., Revalde, G., Skudra, Ja., Veilande, R., J. Phys. D: Appl. Phys. 44, 155201 (2011)CrossRef
Denisova, N., IEEE Trans. Plasma Sci. 37, 502 (2009)CrossRef
Schottky, W., Z. Phys. 25, 342 (1924)
Vainstein, L.A., Sobelman, I.I., Yukov, E.A., Excitation of Atoms and Broadening of Spectral Lines (Nauka, Moscow, 1979), p. 319 [in Russian]Google Scholar
Denisova, N., Revalde, G., Skudra, A., Zissis, G., Zorina, N., J. Phys. D: Appl. Phys. 38, 3275 (2005)CrossRef
Uvarov, F.A., Fabrikant, V.A., Opt. Spectrosc. XVIII, 323 (1965)