Gyrotron generation of broadband chaotic radiation under overlapping of high- and low-frequency resonances
- Authors: Rozental’ R.M.1, Ginzburg N.S.1, Sergeev A.S.1, Zotova I.V.1, Fedotov A.E.1, Tarakanov V.P.2,3
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Affiliations:
- Institute of Applied Physics
- National Research Nuclear University MEPhI
- Joint Institute for High Temperatures
- Issue: Vol 62, No 10 (2017)
- Pages: 1562-1568
- Section: Radiophysics
- URL: https://journals.rcsi.science/1063-7842/article/view/200152
- DOI: https://doi.org/10.1134/S106378421710019X
- ID: 200152
Cite item
Abstract
Significant (up to 10%) broadening of the band of noise-like radiation in gyrotrons is possible due to specific tuning of gyrofrequency relative to the critical frequency of the working mode when the high- and low-frequency cyclotron resonances are substantially separated at the given translation and transverse velocities of electrons. The generation bands at the resonances are overlapped under operation above the threshold. The analysis with allowance for finiteness of the electron transit time in the interaction space and, hence, different slopes of the dispersion characteristics of electron beam and wave is critically important for correct investigation of the generation regimes in the framework of the average approach. The results are verified using direct 3D particle-in-cell simulation of the chaotic generation regimes of the gyrotron generation in the 8-mm-wavelength range.
About the authors
R. M. Rozental’
Institute of Applied Physics
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
N. S. Ginzburg
Institute of Applied Physics
Author for correspondence.
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
A. S. Sergeev
Institute of Applied Physics
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
I. V. Zotova
Institute of Applied Physics
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
A. E. Fedotov
Institute of Applied Physics
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
V. P. Tarakanov
National Research Nuclear University MEPhI; Joint Institute for High Temperatures
Email: ginzburg@appl.sci-nnov.ru
Russian Federation, Moscow, 115409; Moscow, 125412