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We demonstrate that gyrotrons operating in the regime of developed turbulence can sporadically emit “giant” spikes with intensities a factor of 100 ÷ 200 greater than the average radiation power and a factor of 4 ÷ 6 exceeding the power of a driving electron beam. Together with a long-tail pulse-height probability distribution, this allows the interpretation of generated spikes as microwave rogue...
The use of hollow electron beams permits a significant increase in the diameter of the beam tunnel in comparison with the conventional pencil-beam slow-wave electron devices. As a result, the current density and the heating of the microwave structure are decreased, which allows increasing the average radiation power at high frequencies. To demonstrate this capability, two versions of W-band oscillators,...
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