Discharge in the saline solutions in a vicinity of the threshold voltages

International Congress on Energy Fluxes and Radiation Effects

Korolev, Y.D.^1,2,3 ; Shemyakin, I.A.^1,2 ; Ivashov, R.V.^1,2 ; Kasyanov, V.S.^1,2 ; Landl, N.V.^1,2 ; Sun, Y.H.^4 ; Shao, T.^4 ; Gao, Y.^4

Institute of High Current Electronics RAS, Tomsk

634055, Russia^1

Tomsk State University, Tomsk

634050, Russia^2

Tomsk Polytechnic University, Tomsk

634050, Russia^3

Institute of Electrical Engineering, Chinese Academy of Science, Beijing

100190, China^4

关键词: Active electrodes;    Coaxial electrodes;    Metal electrodes;    Negative polarity;    Negative voltage;    Positive voltage;    Saline solutions;    Threshold-value;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012005/pdf
DOI  :  10.1088/1742-6596/552/1/012005

来源: IOP

【 摘 要 】

This paper deals with the discharge in saline solution (0.9 % NaCl) in coaxial electrode system at voltages up to several hundred volts. The discharge was powered by bipolar pulsed generator with a pulse repetition rate of 100 kHz and by a generator of negative voltage pulses. At voltages less than a threshold value (less than 300 V)' different types of gas microcavities are formed at the surface of active electrode: the microbubble' the conglomerates of microbubbles (thin gas layers) and a macrobubble with diameter of about 1 mm and less. In a vicinity of threshold voltage the breakdown in the gas cavities occur. For negative polarity at the metal electrode the discharge burns in a form of microsparks of short duration. At positive voltage pulses' the glow-type discharge is sustained in the microcavities.