Investigating the Impact of Gas type and Gas Flow Rate on Plasma Jet Parameters by Optical Emission Spectroscopy
Abstract
This study describes the creation of jet plasma at atmospheric pressure with a straightforward plasma jet generation system utilizing air, argon, and nitrogen gases. It comprises a 10 kV high-voltage DC apparatus with a 30 W power output. This research primarily aims to examine the effects of varying the gas flow rate and the gas type (argon, nitrogen, or air) on the microscopic non-thermal plasma features by optical emission spectroscopy (OES). The Boltzmann diagram method was employed to calculate the electron temperature (Te), electron density (ne), and further related quantities, along with other plasma properties. At low flow rates, the electron temperature in argon remains almost constant as the electron density increases, irrespective of the gas flow rate. The electron temperature and nitrogen density exhibit more variation with flow rate. The electron temperature in air exhibits considerable fluctuations with varying flow speeds, although the electron density shows very less variation.
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