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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|
|Abstract:||Fourteen ions (Ar+, Ar2+, ArH+, H2O +, H+(H2O), H+(H2O) 2, O+, O2+, OH+, NO+, N2+, N +, Ar2+, N4+) were detected, by mass-resolved ion-energy measurements when the discharge was operated at 50 W and fluxes of 2.5 and 5.0 slm. The crucial role of three molecular ions (Ar2+, ArH+, H2O +) during the radial contraction, from diffuse (r = (750 ± 50) μm) to contracted plasma jet (r = (500 ± 50) μm), and the relationship between power, gas flow and molecular ions production were pointed out. Ion energy distributions for Ar2+, ArH+ and H2O + exhibit their maxima at high-energies due to low-energy threshold for three-body collision reactions. © 2014 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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