Investigation of parameters and uninterrupted service of a generator of gas-discharge plasma based on a nonsustained hot-cathode arc discharge in gas

International Congress on Energy Fluxes and Radiation Effects

Borisov, D.P.^1 ; Korotaev, A.D.^1 ; Kuznetsov, V.M.^1 ; Chulkov, E.V.^1

Tomsk State University, Tomsk

634050, Russia^1

关键词: Cathode filaments;    Discharge currents;    Electrode systems;    Experimental investigations;    Gas-discharge plasmas;    Long term service;    Plasma generation;    Plasma generator;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012001/pdf
DOI  :  10.1088/1742-6596/552/1/012001

来源: IOP

【 摘 要 】

The design of an electrode system and the characteristics of a gas-discharge plasma source (generator) based on an arc discharge in gas sustained by thermionic emission are presented. The results of an experimental investigation of the service life of a thermionic (hot) cathode of the plasma generator are reported as a function of the discharge current and voltage and the cathode filament power. It is shown that an increase in the burning voltage from 28 to 60 V considerably reduces the service life of the hot cathode, while the discharge current and the cathode filament power exert a less critical effect on its lifetime. The conditions necessary for achieving long-term service life parameters and high efficiency of plasma generation are found out.