Preprint Article Version 1 This version is not peer-reviewed

Triple Langmuir Probe for Diagnosis of Plasma Produced by Dielectric Barrier Discharge of Parallel Plates in Atmospheric Pressure

Version 1 : Received: 26 January 2019 / Approved: 31 January 2019 / Online: 31 January 2019 (07:36:09 CET)

How to cite: Alves de Souza, I.; Freire de Medeiros Neto, J.; Karla Paixão Silveira, A.; Henrique de carvalho Costa, T.; Pantaleon Matamoros, E.; Cequeira Feitor, M.; Ribeiro Magalhães Sousa, R. Triple Langmuir Probe for Diagnosis of Plasma Produced by Dielectric Barrier Discharge of Parallel Plates in Atmospheric Pressure. Preprints 2019, 2019010323 (doi: 10.20944/preprints201901.0323.v1). Alves de Souza, I.; Freire de Medeiros Neto, J.; Karla Paixão Silveira, A.; Henrique de carvalho Costa, T.; Pantaleon Matamoros, E.; Cequeira Feitor, M.; Ribeiro Magalhães Sousa, R. Triple Langmuir Probe for Diagnosis of Plasma Produced by Dielectric Barrier Discharge of Parallel Plates in Atmospheric Pressure. Preprints 2019, 2019010323 (doi: 10.20944/preprints201901.0323.v1).

Abstract

This work aimed to characterize a DBD plasma equipment through optical and electrical measurements, seeking to obtain a greater knowledge of the plasma production process and how it behaves through the adopted parameters, such as frequency and voltage applied between electrodes, at a fixed distance of 1.7 mm. In order to measure them, three different characterization techniques were applied. The first method was the Lissajous figures, a technique quite effective for a complete electrical characterization of DBD equipment. The second technique used was the Optical Emission Spectroscopy, a tool used for the diagnosis of plasma, being it possible to identify the excited species produced in filamentary and diffuse discharge in the plasma. And finally, the triple Langmuir probe technique was used to obtain the electron temperature and electron density. Based on this study, it was possible to identify the equipment efficiency in different regimes. The electron temperature measurement for both systems analyzed were 27.96 eV and 20.69 eV to the filamentary and diffuse regimes, respectively. The density of electrons number to these regimes were 1.09 × 1021 m−3 and 1.56 × 1021 m−3.

Subject Areas

optical emission spectroscopy; Lissajous figures; triple Langmuir probe

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