Diagnostics of Helium-Argon Arc Discharge Plasma Based on Spectral Line Shape Measurements |
| T. Wujec and J. Musiełok Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland |
| Received: October 2, 1998; in final form November 27, 1998 |
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| Electron densities and ion (gas) temperatures on the axis of an arc discharge plasma, produced at atmospheric pressure in a gas mixture of 95% helium and 5% argon, are determined at two arc currents. The evaluation of both main plasma parameters is based on line shape measurements, the ion temperature on the Doppler broadening of selected ArII lines, while the electron density on the Stark broadening of the hydrogen Hβ line which appear in the spectrum due to hydrogen traces in the applied gases. The significance of reliable plasma diagnostics for determination of atomic structure data is discussed. |
| DOI: 10.12693/APhysPolA.95.221 PACS numbers: 32.30.-r, 32.70.-n, 52.25.-b |