期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 107, 期 -, 页码 164-169出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2015.03.008
关键词
Plasma spectroscopy; Microwave discharges; Electron density; Atomic spectral lines; Atomic emission spectroscopy
类别
资金
- Fisica de Plasmas: Diagnosis, Modelos y Aplicaciones research group [FQM 136]
We present an alternative optical emission spectroscopy method to measure the plasma electron density from the difference of widths of two Balmer series hydrogen lines (Ha and He), especially convenient for non-thermal plasmas since with this method, there is no need to know either the gas temperature or the van der Waals contribution to the Lorentzian part of the line. In this paper it has been assumed that the part of full width at half maximum due to Stark broadening can be determined with the approximation of Lorentzian line shape. The method has been applied to the determination of the electron density in an argon microwave-induced plasma maintained at atmospheric pressure, and comparison with the results obtained using other diagnostic methods has been done. (C) 2015 Elsevier B.V. All rights reserved.
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