New utilization of compact Tesla transformer for multi-channel triggering of Field distortion spark gap switch

Summary form only given as follows. In very high current applications (many hundreds of kA), Multi-channel triggering is critical for reduction of switch inductance, increasing high peak current switching capability and switch life time. For this, applying a high voltage pulse as quickly as possible to trigger the electrode in order of kV/nS is necessary. We utilized a pulse generator based on a pulsed resonant Tesla transformer. A 30 kV output voltage, 50 Omega impedance, 20 mJ energy nanosecond rise time pulse has been achieved. The ANSYS finite element package has been used for static analysis of the electric field distribution in the dielectric medium in the transformer to ensure that there is no corona discharge. Also this analysis has been used for prediction of primary and secondary inductance and investigation of the variation of the output voltage. The PFL line is established as a coaxial internal structure into the transformer. A self-breakdown peaking gas spark gap switch has been used to discharge PFL energy into the transmission line. A multi-channel spark between trigger electrode and cathode main electrode has been obtained. The output voltage has been measured with a high frequency capacitive divider probe which has good agreement with the analysis.