Study of the Nonlinear Dynamics of a Traveling-Wave-Tube Oscillator with Delayed Feedback

Details Study of the Nonlinear Dynamics of a Traveling-Wave-Tube Oscillator with Delayed Feedback Study of the Nonlinear Dynamics of a Traveling-Wave-Tube Oscillator with Delayed Feedback

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004r%26qe...47..116r&link_type=abstract

Radiophysics and Quantum Electronics, vol. 47, issue 2, pp. 116-128

Physics

7

Scientific paper

We present the results of numerical simulations of the nonlinear dynamics of a traveling-wave-tube (TWT) oscillator with delayed feedback. Basic properties of stationary single-frequency oscillation regimes are considered, and the onset of self-modulation is studied in detail. Various route-to-chaos scenarios corresponding to successively increasing values of the beam current are simulated numerically. It is shown that the basic scenario is a quasi-periodic route to chaos, while the beam deceleration in strongly nonlinear regimes causes transitions via intermittency to regimes based on modes with higher frequencies. Competition between these two scenarios leads to a complex picture of regular and chaotic self-modulation regimes in the parameter space. Such a behavior is typical of distributed electron-wave self-excited oscillators with delayed feedback.

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