Measuring of high current channel parameters in high pressure gas by combined using of magnetic probe and high speed streak photography

31st International Conference on Equations of State for Matter

Bogomaz, A.A.^1 ; Pinchuk, M.E.^1,2 ; Budin, A.V.^1 ; Leks, A.G.^1 ; Leont'Ev, V.V.^1 ; Pozubenkov, A.A.^1 ; Kurakina, N.K.^1,2

Institute for Electrophysics and Electrical Power, Russian Academy of Sciences, Dvortsovaya Naberezhnaya 18, Saint-Petersburg

191186, Russia^1

Peter the Great Saint-Petersburg Polytechnic University, Polytechnicheskaya 29, Saint-Petersburg

195251, Russia^2

关键词: Channel diameters;    Channel parameter;    Current amplitude;    Current rise rates;    Discharge channel;    Equilibrium state;    High pressure gas;    Initial pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012186/pdf
DOI  :  10.1088/1742-6596/774/1/012186

来源: IOP

【 摘 要 】

Experimental results for discharge in hydrogen with current amplitude up to 1 MA, current rise rate of ∼ 1010A/s, and at initial pressure up to 30 MPa are presented. A series of channel contractions was observed at a current rise stage. Estimation of plasma channel parameters was made for equilibrium state at the channel diameter oscillations. The speed of the discharge channel contraction was determined by the specially developed magnetic- probe technique. Comparison of these magnetic probe measurements with high-speed optical photostreaks was carried out.