a pulser with solid dielectrics including a pulse compressor and pulse transformer apparatus , which is able to produce short bursts of electrical energy at high voltage utilizing a coaxial structure . both the transformer and the compressor utilize ferromagnetic cores having an inner and an outer diameter , and isolating members of similar geometry . the cores and ceramic members are held in place using conducting plates and bus bars . the overall structure of the compressor and the transformer is built around a central axis .