400-kV Trigatrons for High-Power Low-Inductance Pulse Generators

摘要

A series of four-channel trigatrons operating at a voltage of up to 400 kV and a current of 280 kA per channel have been developed and tested. The control electrode is coaxially arranged in a hole of the main (positive) high-voltage electrode. This design ensures a small spread (jitter) of the operation delay time (Δt{sub}d < 1 ns) for the discharge gap filled with elegas (SF{sub}6). The electric strength of lateral surfaces of the device body is increased without using dielectric fluids. The service life of switches is increased by using tubular metal (steel) screens in the working volume. For the parallel operation of trigatrons, the Δt{sub}d value is also below 1 ns, but it sharply increases if the gap between the main electrodes exceeds 11-12 mm.