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Title:
In-situ diagnostics of hydrocarbon dusty plasmas using quantum cascade laser absorption spectroscopy and mass spectrometry
Authors:
Ouaras, K.; Delacqua, L. Colina; Lombardi, G.; Röpcke, J.; Wartel, M.; Bonnin, X.; Redolfi, M.; Hassouni, K.; Hassouni
Affiliation:
AA(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AB(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AC(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AD(INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany), AE(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AF(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AG(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AH(LSPM-CNRS, Université Paris 13, Sorbonne Paris Cité, 99 av. Jean-Baptiste Clément, 93430 Villetaneuse, France), AI()
Publication:
Journal of Plasma Physics, Volume 80, Issue 6, pp. 833-841
Publication Date:
12/2014
Origin:
CUP
Abstract Copyright:
(c) 2014: Copyright © Cambridge University Press 2014
DOI:
10.1017/S0022377814000361
Bibliographic Code:
2014JPlPh..80..833O

Abstract

The formation of carbon nanoparticles in low pressure magnetized H2/CH4 and H2/C2H2 plasmas is investigated using infrared quantum cascade laser absorption, mass spectrometry, and electrostatic probe measurements. Results showed that dust formation is correlated to the presence of a significant amount of large positively charged hydrocarbon ions. Large negative ions or neutral hydrocarbon were not observed. These results, along with a qualitative comparison of diffusion and reaction characteristic, suggest that a positive ion may contribute to the growth of nanoparticles in hydrocarbon magnetized plasmas.
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