A 100 GW, 100ps solid-state pulsed power system based on semiconductor opening switch generator and magnetic compression lines.

Abstract

Based on the SOS + MCL approach (SOS-generator with output Semiconductor Opening Switch; MCL-Magnetic Compression Line), a high-power solid-state picosecond system has been developed. The SOS generator forms an initial pulse with a power of 8.5 GW (0.65 MV at a load of 50Ω) and a duration of 7ns, which is fed to the input of a magnetic compressor containing 4 lines MCL1-MCL4 connected in series. Structurally, each MCL is a coaxial line and contains ferrite rings placed on its inner conductor and magnetized by an external longitudinal magnetic field. The lines are filled with transformer oil at excess pressure. Each line compresses the pulse in time and increases its peak power. At the output of the last line, MCL4, the peak power increases to 100 GW (2.2 MV at 48Ω load), and its duration decreases to 100ps. Record high values of rise rates for voltage, current, and power have been achieved. At a 48Ω load, the voltage rise rate reaches 27 MV/ns, and the power rise rate reaches 2 TW/ns. In a line with an impedance of 7Ω, a current pulse with an amplitude of 100kA and a rise rate of 1.18 MA/ns was obtained. It has been established that the duration of the pulse (full width at half maximum) generated in MCLs corresponds to the double transit time of an electromagnetic wave between the electrodes of the line in the transverse direction. Numerical models have been developed to study the operation of MCLs. Using the models, the internal structure of the process of power amplification in the line was studied, and an assessment was made on the influence of the processes of gyromagnetic precession on the operation of the lines.