Mustansiriyah Journal of Pure and Applied Sciences

Optical Diagnostics of Zn foil using Non thermal plasma jets (NTPJ) via high voltage

Raneen Qasem Mohammed1 Baida M. Ahmed2

1,2Department of Physics, College of Science, Mustansiriyah University, Baghdad, Iraq

Keywords: Non thermal plasma jet (NTPJ), OES, High Voltage, Mixture gases (Ar/O),, Zinc plate

Abstract

The plasma is applied on a zinc (Zn) plate using a Non thermal plasma jets (NTPJ) system that applies different high voltage at gas flow mixture (Ar/O) with a ratio of (10/1) constant at (40)l/min and time exposer 15 sec. Investigated were the optical emission spectroscopy (OES) characteristics of the Ar/O plasma on the Zn plate, when ignited at various high voltage (10, 14, and 18 KV). Using a method based on Stark broadening of the line density investigated, it was possible to determine the electron temperature in the range of (1.6-2.9) eV using the Boltzmann method, and the concentration of electrons was determined in the range of (12.3-9.9)x1017cm-3 depending on the amount absorbed by the various voltage. Other characteristics of the plasma's parameters have been determined using the (OES) for Ar/O by choosing the strong intensity spectral line's (frequency , Debye length , and Debye sphere ND) characteristics. The plasma flame's length was also measured using a ruler, it increased from 1 to 3 cm according to increasing voltage.