“VIVA- I”, versatile inductive voltage adder for high-voltage pulse-power generation

Versatile inductive voltage adder system, “VIVA-I”, with high potential gradient has been successfully developed. It has been designed to produce output pulse of 4 MV, 60 ns by adding 2 MV pulses in 2-stages of induction cells, where amorphous cores are installed. Within ~40 % of full charge voltage, pulse-power characteristics of Marx generator, pulse-forming line (PFL) , transmission line, and induction cells were tested for three types of load; open circuit, dummy load of CuSO₄ resistor, and electron diode. In open circuit test, ~2.0 MV of output voltage was obtained with good reproducebility. Dependence of output voltage on diode impedance was evaluated by using a dummy load, and good agreement was obtained with that expected. An E-beam diode was operated successfully, and 18 kA of beam current was obtained.