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arXiv · 1705.01796

Generation of rogue waves in gyrotrons operating in the regime of developed turbulence

N. S. Ginzburg·R. M. Rozental·A. S. Sergeev·A. E. Fedotov·I. V. Zotova·V. P. Tarakanov
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Abstract

Within the framework of the average approach and direct 3D PIC (particle-in-cell) simulations we demonstrate that the gyrotrons operating in the regime of developed turbulence can sporadically emit "giant" spikes with intensities a factor of 100-150 greater than the average radiation power and a factor of 6-9 exceeding the power of the driving electron beams. Together with the statistical features such as a long-tail probability distribution, this allows the interpretation of generated spikes as microwave rogue waves. The mechanism of spikes formation is related to the simultaneous cyclotron interaction of a gyrating electron beam with forward and backward waves near the waveguide cutoff frequency as well as with the longitudinal deceleration of electrons.

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N. S. Ginzburg, R. M. Rozental, A. S. Sergeev, A. E. Fedotov, I. V. Zotova, V. P. Tarakanov. 2017-09-19. Generation of rogue waves in gyrotrons operating in the regime of developed turbulence. https://doi.org/10.1103/physrevlett.119.034801

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