ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

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Linear theory of multisection broadband twt with inhomogeneous helix slow wave structure

We present the mathematical models, computer code and numerical analysis for modeling linear operation regimes of broadband helix travelling­wave tube (TWT) with the inhomogeneous slow wave structure along the interaction space. One­dimensional model of the interaction of the forward and reflected electromagnetic waves with an electron beam in a inhomogeneous section of the slow wave structure was researched. The calculation method of the linear gain and self­excitation conditions of multisection TWT was suggested.

Study of discrete electron-wave interaction in the passband and stopband of slow-wave systems

This article contains analysis of properties discrete electron-wave interaction in resonance slow-wave system (SWS). Equations of interaction are written in matrix form. Eigenvalues of transfer matrix with electron beam de?ne spread constant of four electron waves. Features of electron waves in SWS with «smooth» energy stream and in SWS with «winding» ?ow are examined. Simulation is performed and ampli?cation of multisection TWT with passband and stopband sections of SWS is found. Field distribution along stopband section is found.