Original title: Study of Expanding Thermal Plasma Jet Using Molecular Spectra
Translated title: Studium expandujícího proudu termického plazmatu s využitím molekulových spekter
Authors: Mašláni, Alan ; Sember, Viktor
Document type: Papers
Conference/Event: Symposium on Physics of Switching Arc/16th./, Brno (CZ), 2005-09-05 / 2005-09-09
Year: 2005
Language: eng
Abstract: [eng] [cze]
Thermal plasmas generated by plasma torches are well-known for their high temperatures and high enthalpies. Therefore optical emission spectroscopy is appropriate diagnostic method because of strong emission of radiation corresponding to the visible light. The decay of excited atoms, ions and molecules causes emission of the light at characteristic wavelengths. Except spectral lines of atoms and ions, also some molecular bands can be seen in the spectra of the plasma jet. Especially expanding thermal plasma jet operated under low pressure conditions offers possibility of observing molecular transitions. Pressure lower than atmospheric may cause the presence of supersonic flow and departures from thermodynamic equilibrium. Spectra of OH radical have been investigated using computer code LIFBASE, which contains a lot of data regarding spectra of diatomic molecules. Radial profiles of rotational and vibrational temperatures have been found in several regions of the jet. Práce se zabývá studiem termického plazmatu generovaného v plazmatronech s využitím metod optické emisní spektroskopie. V případě provozu při sníženém tlaku jsme pozorovali spektra molekuly OH, které jsme dále zkoumali s pomocí programu LIFBASE. Určili jsme rotační a vibrační teploty, které do určité míry charakterizují teploty těžkých částic a elektronů, a mají vztah ke stupni termodynamické nerovnováhy v plazmatu.
Keywords: OH radical; optical emission spectroscopy; thermal plasma Jet
Project no.: GD203/03/H140 (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of the XVIth Symposium on Physics of Switching Arc, ISBN 80-214-2931-3

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0110980

Permalink: http://www.nusl.cz/ntk/nusl-31906


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Research > Institutes ASCR > Institute of Plasma Physics
Conference materials > Papers