Main Article Content
The design of atmospheric plasma jet is basically using the combination of Ar-gas, different Needle diameters size, potential difference and a good dielectric material. In this work, we used Teflon tube as a dielectric material with different needle diameter size to investigate the effect on the plasma discharge. We studied the changes of plasma discharge by observing the discharge lengths ,applied voltage and the spectrum of Ar-gas. We introduced a gas flow rate of 5 L/min and maximum Needle diameter of dielectric material of 2.75 mm. Results showed that the discharge length are capable of reaching 3 cm for large needle while for medium needle the length of plasma jet is 1.75mm and at last for small needle size the plasma jet length is 1 cm and having various excited plasma species shown through optical emission spectrum.