| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000361845 |
| ISSN: | 0103-9733 |
| Autores: | Bredice, F1 Borges, F.O2 Di Rocco, H.O3 Mercado, R.S4 Villagrán Muñiz, M5 Palleschi, V6 |
| Instituciones: | 1Centro de Investigaciones Opticas, La Plata, Buenos Aires. Argentina 2Universidade Federal Fluminense, Instituto de Fisica, Niteroi, Rio de Janeiro. Brasil 3Universidad Nacional del Centro, Instituto de Física Arroyo Seco, Tandil, Buenos Aires. Argentina 4Universidad del Atlántico, Grupo de Espectroscopia Optica de Emisión y Láser, Barranquilla, Atlántico. Colombia 5Universidad Nacional Autónoma de México, Centro de Ciencias Aplicadas y Desarrollo Tecnológico, México, Distrito Federal. México 6Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici, Pisa, Toscana. Italia |
| Año: | 2013 |
| Periodo: | Ago |
| Volumen: | 43 |
| Número: | 4 |
| Paginación: | 239-246 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | We present a method to estimate the temperature of transient plasmas and their degree of departure from local thermodynamic equilibrium conditions. Our method is based on application of the Saha–Boltzmann equations on the temporal variation of the intensity of the spectral lines of the plasma, under the assumption that the plasmas at the different times when the spectra were obtained are in local thermodynamic equilibrium. The method requires no knowledge of the spectral efficiency of the spectrometer/detector, transition probabilities of the considered lines, or degeneracies of the upper and lower levels. Provided that the conditions of optically thin, homogeneous plasma in local thermodynamic equilibrium are satisfied, the accuracy of the procedure is limited only by the precision with which the line intensities and densities can be determined at two different temperatures. The procedure generates an equation describing the temporal evolution of the electron number density of transient plasmas under local thermodynamic equilibrium conditions. The method is applied to the analysis of two laser-induced breakdown spectra of cadmium at different temperatures |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Teoría cinética y plasmas, Láser de plasma, Temperatura de electrones, Densidad de electrones |
| Keyword: | Physics and astronomy, Kinetic theory and plasma, Laser plasma, Electron temperature, Electron density |
| Texto completo: | Texto completo (Ver HTML) |
