External Transverse Direct Current Magnetic Field Effect On Optical Emission Of a Non-Thermal Atmospheric Pressure Argon Plasma Jet

An experimental study of plasma jet at atmospheric pressure was carried out to examine the influence of external transverse magnetic field on it. A magnetic field was applied to the jet in atmospheric pressure by means of a pair of coils, same Helmholtz coil configuration. It was applied transverse to the jet flow. The strength of the direct current magnetic field was 00.057 Tesla between the two coils in parallel application. It was shown that the plasma gas flow plays the main role in magneto-active collision-dominated plasma. The effect of plasma fluid velocity on the jet emission was discussed, qualitatively. The measurements revealed that the plasma jet irradiance decreases in parallel field. The former was attributed loss of plasma species that reduces the magneto-plasma jet irradiance and in turn shrinks plasma jet number density. As a result, it was concluded that the plasma fluid velocity lead to decrease optical radiation intensity.