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https://hdl.handle.net/1822/20724
Título: | Capacitively coupled rf coupled plasmas in N2-H2 mixtures |
Autor(es): | Mahjoub, A. Gouveia, A. Carrasco, N. Pintassilgo, C. D. Marques, L. Ramos, Marta M. D. Alves, L. L. Cernogora, G. |
Data: | Jul-2012 |
Editora: | European Physical Society |
Resumo(s): | This paper studies the modifications induced in low-pressure radio-frequency (rf) capacitively coupled nitrogen plasmas, by the addition of a few amount of hydrogen (up to 5%). The work is an intermediate step towards the study of N2-CH4 plasmas, for the simulation of the ionospheric chemistry of Saturn's satellite Titan. The plasmas are studied using both experiments and simulations. The experimental setup is a parallel-plate reactor (driven at 13.56 MHz frequency), surrounded by a cylindrical metallic grid to confine the discharge [1]. Electrical diagnostics allow measuring: (i) the electron density, by using a resonant cavity method; (ii) the effective rf power coupled to the plasma, by using the subtractive method [2]. Optical emission spectroscopy diagnostics are used to study the evolution, with the working conditions, of: (i) the First Negative System with the N2+ band; (ii) the atomic hydrogen Hβ line at 486.1 nm; (iii) the atomic argon line at 811.5 nm. Simulations use a hybrid code that couples a 2D (r, z) time-dependent fluid-type module, describing the transport of the charged particles, to a very complete 0D kinetic module, for the nitrogen-hydrogen mixture. Results reveal that the electron density increases with the amount of injected H2, at constant coupled power. References [1] G. Alcouffe et al, Plasma Sources Sci. Technol. 19, 015008 (2010) [2] L.L. Alves et al, Plasma Sources Sci. Technol. (submitted, 2012) |
Tipo: | Resumo em ata de conferência |
URI: | https://hdl.handle.net/1822/20724 |
Versão da editora: | http://ocs.ciemat.es/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FCT - Comunicações/Communications (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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C178-2012.pdf.pdf | EPS2012a | 182,03 kB | Adobe PDF | Ver/Abrir |