Effect of triggering sequences on output parameters of linear transformer driver

Ultrahigh pulsed power with short rise time has been needed in many applications. For single linear transformer driver(LTD) module with sixty cavities connected in series, this paper has explored the effect of the cavity-triggering sequences on the output current parameters of the LTD module and discussed the possibility to optimize the output parameters of single LTD module through adjusting the triggering time of each cavity. The results indicate that the current shapes of single LTD module could be adjusted effectively through adjusting the cavity triggering sequence. And the output current will have shorter risetime and higher peak if the switches in each cavity are closed after the arrival of the electromagnetic pulses from its neighbor immediately upstream. With the insulation level of present switches used in LTD facilities considered, a pulsed current with the risetime of 12.5 ns reduced by a factor of 4 from 56.50 ns and the peak of 1 340 kA increased by 30% from 1 018 kA could be generated by the LTD module when the cavity-triggering sequence is optimized to make the voltage across the switches before closure increase from DC charging voltage 200 kV to pulse voltage of 400 kV.