Simulation of the helical slow-wave structure of a high-power traveling-wave tube

Simulation of the output characteristics of high-power helical traveling-wave tubes

“…Study of the dispersion characteristics [3] demon strated good agreement between the values of the slowing factor calculated using the dispersion relation and the 3D electrodynamic simulation and the exper imental data. At the same time, the experimental ver ification of values of the SWS coupling resistance and the radius of the electron flow is a complex problem that requires special equipment.…”

“…The numerical simulation yielded the distributions of the power level at the fun damental and double frequencies of the input signal, gain factor, harmonics of the electron beam, phase tra jectories of large particles, and the spectrum of veloci ties along the device length. Frequency dependences of the slowing factor and coupling resistance are cal culated by means of solution of the dispersion relation [3,4]. The program also allows using the dispersion characteristics obtained in a stricter electrodynamic calculation or in the experiment.…”

“…In this study, we outline the technique for the numerical simulation of the interaction space of heli cal TWTs with the use of previously developed meth ods for calculation and experimental determination of the parameters of SWSs and electron beams [1][2][3]6]. This technique became the basis of the algorithm of the developed program.…”