Determination of the plasma parameters of a glow discharge in long tubes

8th All-Russian Conference on Low Temperature Plasma in the Processes of Functional Coating Preparation

Kiselev, A.S.^1 ; Kostrin, D.K.^1 ; Lisenkov, A.A.^2 ; Smirnov, E.A.^1

Department of Electronic Instruments and Devices, Saint Petersburg Electrotechnical University LETI, Saint-Petersburg

197376, Russia^1

Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Saint-Petersburg

199178, Russia^2

关键词: Accommodation coefficients;    Balance equations;    Calculated values;    Discharge conditions;    Experimental values;    Multicomponent mixture;    Plasma parameter;    Potential gradients;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/789/1/012027/pdf
DOI  :  10.1088/1742-6596/789/1/012027

来源: IOP

【 摘 要 】

In this work experimental current-voltage characteristics of a glow discharge occurring in long tubes for a wide range of discharge conditions (pressure, diameter of the discharge tube, nature of the gas) were obtained. On the basis of the current-voltage characteristics was calculated the longitudinal potential gradient in the positive column. With the help of the developed computer program was calculated the electron temperature for discharge conditions corresponding to the experiment. The technique is based on the use of the balance equations of ionization in gas discharges occurring in long narrow tubes, and provides the possibility for calculation of the discharge plasma parameters, both in pure gases and in multicomponent mixtures. Based on the experimental values of the longitudinal potential gradient in the positive column and the calculated values of the electron temperature was calculated the dependence of accommodation coefficient for the electrons from the discharge conditions. The compliance between the experimental and reference data was obtained.