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The standard deviation σt of a phase delay with respect to a fixed voltage level during the voltage pulse rise time in a nanosecond pulsed Gunn oscillator was measured. A method of measuring the pulse current of the Gunn diode inside the resonator chamber was proposed. The standard deviation σδt of a phase difference for two Gunn oscillators being electrodynamically decoupled and connected in parallel...
Recent studies of the generation of GW-level nanosecond microwave pulses in extended BWO-type slow-wave structures have been showed an opportunity for stabilization of the RF field phase. Decline in the dependence of the output microwave power on the electron energy in this operation mode allows reaching radiation peak power spread not exceeding voltage variation on a vacuum diode. Superradiative...
Two versions of modernized experimental setup (i.e., nonstationary relativistic X-band BWO) were used for the generation of subnanoseeond-width, gigawatt-range pulses of microwave superradiation (SR).
Radiation with output power up to 100 MW at wavelength 8 mm, at gain 44 dB and efficiency 11% was obtained in TWT with a relativistic electron beam. In a sectioned generator BWO-twistron, output power was 500 MW at wavelength 10 mm at efficiency 20%.
The experimental data to create relativistic HF-oscillators with the repetition rate up to 103 pps is given. The radiation in the 0.8–3 cm wavelength band with pulse intensity 108–109 W is paid particular attention to. Studied are the relativistic BWO and orotron. The experiments were based on specially designed high-current repetitively-pulsed accelerators with high stability of electron beam parameters.
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