Electroexplosive foil 500 kV current opening switch characteristics research

The increase of explosive magnetic generator power may be achieved by selecting construction of foil opening switch (FOS), having extended break surface. In this work, the results of FOS models tests are presented, which were powered from a capacitor bank with the energy of 225 kJ and output voltage of 100 kV. The time (T/4) of opening switch powering was 4 /spl mu/sec. In inductive load L=0.9*10/sup -6/ H connected through a spark gap parallel to the opening switch, the impulse of current derivative with amplitude of /spl sim/0.6 10/sup 9/ A/sec was received. Amplitude of voltage pulse on the FOS model was 550 kV, pulse duration at semiheight was /spl sim/0.5 /spl mu/sec. Electric strength to electroexplosion products of copper foil was 9.2 kV/cm. Empirical dependence of copper specific resistance upon the specific energy is experimentally obtained and it may be used for engineer computations for estimation and prediction of copper conductors electroexplosion processes. FOS models tests results demonstrated principal possibility of current opening switch construction, which is able to operate with EMG at stored energy of more than 90 MJ and intended for obtaining powers more than 2/spl middot/10/sup 13/ W.