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Schematic of a mutually inductively coupled self-switched parallel spark preionizer. The inset shows the conventional operation of the same with an external switch. Here each of the parallel channels is individually ballasted by a ballasting element .
Maximum breakdown voltage for a capacitance value of 200 pF and maximum rise time of the corresponding current pulse that results in simultaneous closure of the parallel gaps as a function of no of mutually coupled turns.
Range of number of turns over which simultaneous closure is obtained for a constant breakdown voltage of as a function of the value of the capacitance for (a) solenoid air cores (b) solenoid ferrite cores.
Maximum tolerable rise time of the current pulse for which simultaneous closure is obtained as a function of the value of the capacitance for both air and ferrite cores.
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