Theoretical model and optimum design of picosecond pulse generator

To generate 200~500 kV, 1~10 kA picosecond(ps) pulses with 100~500 ps duration, a theoretical model of ps pulse generator has been suggested. The extreme value method has been proposed for the choice of the operation state with the highest gain coefficients, and the derived ps pulse forming line(PFL) achieved normalized gain coefficients of output voltage, energy and power, respectively, of 90%, 70% and 85%. Finally, the impedance ratio of ns PFL to ps PFL was optimized to shorten the loading time of the 500 kV high voltage on the ps-PFL. At the ratio of impedances 1.63, the gains of the output voltage, energy and power reach 94%, 72% and 89% at the time of 4 ps-PFL pulse-widthes, and 99%, 53% and 97% at the 6 ps-PFL pulse widthes, respectively.