Optical diagnostics of decay processes of Ar/SF6 gas blast arcs confined by a nozzle
1 : Kyushu University
2 : Kanazawa University
3 : Tokyo Denki university
4 : Toshiba corporation
* : Corresponding author
Spatiotemporal evolutions of the electron density (ne) were measured in decaying SF6 gas-blast arc discharges formed with a long gap (50 mm) in a confined nozzle using laser Thomson scattering. Pure Ar gas and an 80%Ar/20%SF6 mixture gas were used as the arc quenching media at atmospheric pressure. After reducing the current to zero, both the measured ne and arc radius in the Ar/SF6 gas arc clearly decayed more rapidly than in the pure Ar gas arc.
