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Título del libro: 16th Latin American Workshop On Plasma Physics, Lawpp 2017 - Conference Proceedings
Título del capítulo: Study of an atmospheric-pressure discharge in air

Autores UNAM:
FERMIN CASTILLO MEJIA; OSVALDO FLORES CEDILLO; BERNARDO FABIAN CAMPILLO ILLANES; HORACIO MARTINEZ VALENCIA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2019
Palabras clave:

Atmospheric pressure; Cathodes; Discharge (fluid mechanics); Electric corona; Emission spectroscopy; Infrared devices; Light emission; Needles; Optical emission spectroscopy; Plasmas; Spectrometers; Atmospheric pressure discharge; corona; Corona discharges; Excited species; Metal cathodes; Needle electrodes; Optical emission spectroscopies (OES); Plasma discharge; Electric discharges


Resumen:

The characterization of has been active region of the corona discharge, it is critical and important for several applications. In this work, it investigated an air discharge at atmospheric pressure between a needle electrode and a flat metal cathode, as well as between a needle electrode and a cathode immersed in water. The voltage and current of the plasma discharge were analyzed; the power used was of 14 kW. The air discharge was analyzed by optical emission spectroscopy (OES), using a spectrometer (Model HR2000CG-UV-NIR). The optical emission spectroscopy were measured in the UV-visible-NIR wavelength range between 200 nm and 1100 nm, in order to identify the excited species formed in a corona air discharge. The species observed were: NO transitions A 2 ? ? X 2 ? at 222.2, 272.2 nm; NH transition, A 3 ? ? X 3 S at 336.1 nm; N 2 + transitions B 2 S u ? X 2 S g at 391.4, 423.7, 427.8 and 495.73 nm; N 2 + at 567.95 and 593.17 nm; O at 777.1, S44.6 and S69.56 nm; H2O at 618.8 and 657.8 nm The electron temperature (Te) and electron density (ne) were evaluated using the Boltzmann and Saha equations, they were found to be 7.07 eV and 2.43 x1015cm-3 respectively. © 2017 IEEE.


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