Direct current discharge with microparticles: The electrical characteristics and the plasma trap parameters

31st International Conference on Equations of State for Matter

Shumova, V.V.^1 ; Polyakov, D.N.^1 ; Vasilyak, L.M.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^1

关键词: Direct-current discharge;    Discharge characteristics;    Electric field strength;    Electrical characteristic;    Gas-discharge plasmas;    Ion concentrations;    Micron-size particles;    Structure parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012182/pdf
DOI  :  10.1088/1742-6596/774/1/012182

来源: IOP

【 摘 要 】

The electrical characteristics of the positive column of glow discharge were measured and simulated in pure neon and in plasma with micron size particles. The increment of the longitudinal electric field strength caused by the presence of dust structures was measured. Simulation was based on the diffusion-drift model of the positive column of glow discharge. Simulation was carried out using the measured values of dusty structure parameters and discharge characteristics. It was shown, that a dust structure maintained in a dc discharge represents a plasma trap for ions with ion concentrations more than three times higher than in a free discharge. The results can be used to calculate the traps for confinement of ions and dust particles in gas-discharge plasma.