Abstract

Experimental results for discharge in hydrogen with current amplitude up to 1 MA, current rise rate of ∼ 1010 A/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.

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