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Материал портала ядерных знаний BelNET
статья/документ по запросу ресурса "5397"
Some aspects of numerical investigation of Volume Free Electron Laser nonlinear stage
S.Sytova
2009-06-06
Presentation at the 13th International Conference "Mathematical Modelling and Analysis" MMA2009. May 27–30, 2009, Daugavpils, Latvia
21 P.
The main principle of vacuum electronic devices such as travelling wave tubes (TWT), backward wave tubes (BWT), free electron lasers (FEL) is based on radiation of bunches of charged particles moving over the surface or through the slow-wave system (resonator). Volume Free Electron Lasers (VFEL) are new electronic devices that are more effective on many parameters than other ones.

VFEL operates as follows. An electron beam with electron velocity $u$ passes through a photonic crystal (resonator) of the length $L$. Under diffraction conditions two strong electromagnetic waves can be excited in the resonator. If simultaneously electrons are under synchronism condition, they emit electromagnetic radiation in directions depending on diffraction conditions. None of other electronic devices uses principles of dynamical diffraction of electromagnetic radiation in resonator.

In our previous investigations it is shown that VFEL is a dynamical system with multiple bifurcation points and chaotic dynamics. In this work a conservation law for integro-differential system presented here is obtained. VFEL efficiency analysis is proposed. Some steady-state regimes are investigated analytically and numerically.

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