Novel configuration linear transformer driver with multistages in series sharing common cavity shell

Abstract

Fast Linear Transformer Drivers (FLTD) can directly produce high-power pulse with peak voltage up to tens of megavolt, peak current up to tens of mega ampere, and rise time 70-200 ns, which are widely used in Z-pinch ICF (Inertial Confinement Fusion)/ IFE (Inertial Fusion Energy), X ray radiography, high power laser and high power microwave, and so on. With the development of high power FLTD drivers for Z-pinch ICF/IFE, it is resolved immediately that hundreds of thousands of high power gas switches should be triggered with accurate sequences. A creative topologic FLTD structure with multistages in series sharing induction cavity shell is presented and a novel trigger method achieving nearly ideal IVA triggering sequence is put forward, by which only one trigger pulse is imported to the novel FLTD cavity shell based on an unclosed cores brick and azimutal line in cavities realizing the gas switches triggering in synchronization. The circuit model and three-dimension electromagnetic model of the new structure of three-stage series FLTD sharing induction cavity shell are developed. The simulating results of the equivalent circuits and electromagnetic models demonstrate that the novel configuration FLTDs have the same output parameters and performances as the traditional FLTDs, and validate the possibility and practicability of the novel configuration FLTDs. Based on the novel configuration FLTD and the triggering method, it is hopeful to resolve the huge challenges and difficulties that high power FLTD drivers for Z-pinch ICF/IFE would have too much import triggering and charging cables and the serious requirements for acute triggering sequences of large-scale gas switches.