High-voltage discharge in supersonic jet of plumbum vapor

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Amirov, R.Kh.^1 ; Antonov, N.N.^1 ; Liziakin, G.D.^1 ; Polistchook, V.P.^1 ; Samoylov, I.S.^1 ; Usmanov, R.A.^1 ; Yartsev, I.M.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Discharge gaps;    High-voltage discharges;    Plasma parameter;    Power sources;    Saturated vapor pressure;    Supersonic jets;    Vacuum arcs;    Vacuum discharge;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012165/pdf
DOI  :  10.1088/1742-6596/653/1/012165

来源: IOP

【 摘 要 】

During study of vacuum discharge in plumbum evaporating from molybdenum crucible in identical geometry of discharge gap and the same crucible temperature existence of two different discharge forms were observed. These two forms are vacuum arc with current above 10 A and voltage about 15 V and high-voltage discharge with current about 10 mA and voltage of 340 V. Plumbum was placed in heat-isolated crucible (cathode). Electron-beam heater was situated under the crucible. At the temperature of 1.25 kK that corresponds to plumbum saturated vapor pressure about 0.1 kPa voltage from power source (380 V, 200 A) was applied to anode and high-voltage discharge initiated with characteristics mentioned above. After a few seconds this discharge could turn into arc or could exist hundreds of seconds until total plumbum evaporation. Glow of discharge could take the form of a cone, harness or plasma bunch that hanged at the appreciable distance from the electrodes. The estimations of plasma parameters are presented.