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Type: Artigo de periódico
Title: The crucial role of molecular ions in the radial contraction of argon microwave-sustained plasma jets at atmospheric pressure
Author: Ridenti, MA
Spyrou, N
Amorim, J
Abstract: Fourteen ions (Ar+, Ar-2(+), ArH+, H2O+, H+(H2O), H+(H2O)(2), O+, O-2(+), OH+, NO+, N-2(+), N+, Ar-2(+), N-4(+)) were detected, by mass-resolved ion-energy measurements when the discharge was operated at 50W and fluxes of 2.5 and 5.0 slm. The crucial role of three molecular ions (Ar-2(+), ArH+, H2O+) during the radial contraction, from diffuse (r = (750 +/- 50) mu m) to contracted plasma jet (r = (500 +/- 50) mu m), and the relationship between power, gas flow and molecular ions production were pointed out. Ion energy distributions for Ar-2(+), ArH+ and H2O+ exhibit their maxima at high-energies due to low-energy threshold for three-body collision reactions. (C) 2014 Elsevier B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.cplett.2014.01.050
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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