Abstract
A theory of relativistic traveling wave tube with magnetized thermal plasma-filled corrugated waveguide with annular electron beam is given. The dispersion relation is obtained by linear fluid theory. The characteristic of the dispersion relation is obtained by numerical solutions. The effect of plasma density, corrugated period, waveguide radius and plasma thermal effect on the dispersion relation and growth rate are analyzed. Some useful results are given.
Highlights
Relativistic traveling wave tube (RTWT) is an important high-power microwave (HPM) apparatus which has been developed in the past 20 years [1–3]
The dispersion relation is obtained by linear fluid theory
In TWT, sinusoidal corrugated slow wave structure (SWS) is used to reduce the phase velocity of the electromagnetic wave to synchronize it with the electron beam velocity, so that a strong interaction between the two can take place [10, 11]
Summary
Relativistic traveling wave tube (RTWT) is an important high-power microwave (HPM) apparatus which has been developed in the past 20 years [1–3]. The plasma injection to TWT has been studied recently which can increase the growth rate and improve the quality of transmission of electron beam. We investigate the effect of thermal plasma and electron beam on the growth rate [12–17]. An analytical and numerical study is made on the dispersion properties of a cylindrical waveguide filled with plasma. A RTWT with magnetized thermal plasmafilled corrugated waveguide with annular electron beam is studied. The dispersion relation of corrugated waveguide is derived from a solution of the field equations. The dispersion characteristics of the RTWT are analyzed in detail in different cases of various geometric parameters of slow-wave structure. 2, the physical model of the RTWT filled with thermal plasma is established in an infinite longitudinal magnetic field.
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