Effects of H2 on Ar plasma jet: From filamentary to diffuse discharge mode

摘要: Atmospheric-pressure plasma jets have recently attracted significant interest for its widespread applications in many fields from medicine to nanotechnology, yet the issue of controlling stability Ar remains a major challenge. In this paper, when 3% or more H2 is added working gas Ar, it found that transits filamentary mode diffuse mode. addition, electric characteristics and dynamics plasmas are studied. It peak current flowing through ground electrode filament about 0.5 A, which much higher than 0.05 A Furthermore, similar with those reported, 100 shots integrated photographs on dynamic discharge taken, reveal plume propagation appears like “plasma bullet.” On other hand, single shot show bullet” actually composed several interacting streamers. Detailed analysis shows slow ionization responsible generation filamentary-to-diffuse transition.