High-Voltage and High-PRF FID Pulse Generators

Abstract

Several types of pulse generators with amplitude from 200 to 10 kV, rise time from 200 to 50 ps, pulse duration from several nanoseconds to 100 ps have been developed. At amplitude of 100–200 kV maximum pulse repetition frequency (PRF) in continuous operation can reach 2–5 kHz. Testing of such pulse generators has been performed, and the tests have shown that total efficiency can reach more than 60% at pulse duration of 1–2 ns. Tests have also revealed that electric strength of connectors and transmitting cables rapidly decrease at pulse repetition frequency of 1 kHz and higher. At an amplitude of 10 kV, a rise time of about 100 ps, a pulse duration of 0.5 ns, and an operating frequency of 200 kHz in continuous mode have been reached. The jitter of the delay time between an external triggering pulse and the output high-voltage pulse from the generator is about 10–20 ps. A new type of pulser, which forms voltage pulses with amplitude of 5–10 kV, rise time of 0.5–1 ns, pulse duration of 1–2 ns, operating at pulse repetition rate of 3–6 MHz, has been developed.