Author_Institution :
Coll. of Opto-Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In this paper, a compact rep-rate GW pulsed power generator is developed. First, its three key subsystems are theoretically analyzed, engineering designed, and experimentally investigated, respectively. The emphases are put on these four problems: the theoretical analysis of the voltage distribution across the conical secondary windings of the high-coupling transformer, the investigation of the high energy storage density dielectric used in the pulse forming line, the choice of the gas flow velocity of the gas blowing system, and theoretical analysis of the passive stability of the pulsed power generator operated in rep-rate mode. Second, the developed pulsed power generator is described in detail. It has a 0.2-m diameter, a 1.0-m length, and a 20- Ω wave impedance. Across a 100- Ω resistive dummy load, it can steadily operate at a 300-kV output voltage in 50-Hz rep-rate and 250 kV in 150 Hz without gas blowing system. The average power is ~ 1 kW. Finally, the pulsed power generator is applied to drive a relativistic backward-wave oscillator, generating a high-power microwave with peak output power of 200 MW and duration (full-width at half-maximum) of 5 ns in 150-Hz rep-rate. These efforts set a good foundation for the development of a compact rep-rate pulsed power generator and show a promising application for the future.
Keywords :
pulse generators; transformers; built-in high-coupling transformer; compact rep-rate GW pulsed generator; conical secondary windings; gas blowing system; gas flow velocity; high energy storage density dielectric; pulse forming line; pulsed power generator passive stability; relativistic backward-wave oscillator; voltage distribution; Capacitors; Generators; Oil insulation; Sparks; Switches; Windings; Dielectric breakdown; power supplies; pulse power systems; pulse transformers; spark gaps;