On the influence of metastable states and the behavior of the EEDF in the characterization of the negative glow of a N2-Ar discharge by OES
| Autor: | Vasco Guerra, B.J. Gómez, L Isola, Maia Melina López |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
History
Ar-N2 PLASMA Chemistry Ciencias Físicas Analytical chemistry purl.org/becyt/ford/1.3 [https] OPTICAL EMISSION SPECTROSCOPY NEGATIVE GLOW Computer Science Applications Education Characterization (materials science) purl.org/becyt/ford/1 [https] Astronomía Metastability Negative glow Optical emission spectroscopy Atomic physics CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1088/1742-6596/511/1/012013 |
| Popis: | Optical emission spectroscopy (OES) is an essential diagnostic technique in many plasma systems, such as those used for surface treatments or fabrication of thin films. Despite the simplicity of application of OES, its interpretation is not straightforward. In particular, it requires the use of models, which due to the complexity and variety of discharge conditions, have not yet been fully understood [1]–[3]. In addition, Langmuir probes have been widely used to characterize plasmas. They allow the measurement of several parameters of interest, such as the electron density and temperature, as well as the determination of the electron energy distribution function (EEDF) by numerical derivation of the characteristic V − I [4] or by probe-current modulation [5]. In this work, some second positive system bands in the negative glow of an Ar-N2 plasma at a pressure of 2.5 Torr were investigated both by OES and Langmuir probes, for different mixture concentrations. The main purpose of this study was to verify how metastable states and the behavior of the EEDF may influence the interpretation of OES data Fil: Isola, Lucio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina Fil: López, Maia Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina Fil: Gomez, Bernardo Jose Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina Fil: Guerra, Vasco. Instituto Superior Tecnico; Portugal |
| Databáze: | OpenAIRE |
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