Core structure and secondary breakdown of an exploding wire in the current-pause regime  

作　　者：V.M.Romanova A.R.Mingaleev A.E.Ter-Oganesyan T.A.Shelkovenko G.V.Ivanenkov S.A.Pikuz 

机构地区：[1]P.N.Lebedev Physical Institute of the Russian Academy of Sciences,53,Leninskiy pr.,119991,Moscow,Russia

出　　处：《Matter and Radiation at Extremes》2019年第2期43-51,共9页极端条件下的物质与辐射（英文）

基　　金：This work was supported in part by the NNSA Stewardship Sciences Academic Programs through DOE Cooperative Agreement DE-NA0001836.

摘　　要：The results of experiments with rapidly exploding thin conductors inthe current-pause regime are presented.Copper wires 25mmin diameter and 12 mm in length serve as loads for a GVP pulsed generator based on a low-inductance capacitor.The generator produces current pulses of up to 10 kA with dI/dt up to 50 A/ns.A 100–800-ns current-pause regime is obtained for charging voltages of 10–15 kV.The discharge channel structure is studied by shadow photography using 0.53-mm,10-ns second-harmonic pulses from aNd31:YAG laser.In the experiments,three types of secondary breakdown are observed,with different symmetry types,different current-pause durations,and different dependences on the energy deposited into the wire during its resistive heating.All of these breakdown types develop inside a tubular core that is produced in the current-pause stage and that remains almost undamaged by the breakdown.

关 键 词：BREAKDOWN REGIME structure 

分 类 号：TN2[电子电信—物理电子学]