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In order to improve the efficiency and obtain high output power with pure mode, 3-D particle-in-cell simulations are made on a novel coaxial triode vircator. Simulation results show that due to the appearance of the additional cylindrical cathode rod along the centerline, pure TM01 mode can be obtained in the output region. Simulation results also show that high-efficiency and pure TM01 mode output...
In this study, we focused on the dc-rf efficiency and back-bombardment of a 2.45 GHz oven magnetron. We conducted 3D particle-in-cell (PIC) simulations for estimating the dc-rf efficiency and the back-bombardment quantitatively. The back-bombardment causes short lifetime by deteriorating the cathode. In addition, the increase of back-bombardment reduces dc-rf efficiency. We compared two types of filament...
A 1-THz backward wave oscillator was designed and simulated. The introduction of the double corrugation rectangular waveguide SWS permits an effective interaction with cylindrical electron beams. The advantages of the backward wave operation permit remarkable performance up to 6 mW output power, in compact and realizable way, with a beam current density compatible with carbon nanotube cold cathode.
The characteristics of a submillimetric-wave cold-cathode magnetron oscillator (SubMMO) operating on the first positive spatial π-mode oscillation harmonic are analytically modeled using the drift-orbital resonances and 3-D simulation. The results of this procedure are presented in the short report below. The distinguishing features of the nonlinear dynamics of electron-wave interaction between synchronous...
3D electromagnetic simulation is used to study generator on a virtual cathode with feedback (FB). Implementation of FB through the input cavity in a double-stream mode provides premodulation of an electron beam that magnifies the overall performance of the device. The electromagnetic FB between input and output cavities provides changing of the intensity and frequency structure of oscillations of...
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