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A single-section slow-wave structure for a W-band folded-waveguide traveling-wave tube with operating bandwidth of around 4% was designed for delivering the output power of 50 W at the operating voltage of 13.5 kV and operating beam current of 80 mA. The design was carried out using analytical formulations and 3D electromagnetic simulations. The beam-wave interaction analysis was carried out using...
This paper describes usefulness of timedomain method (TDR) for optimization of couplers of TWT. Initially the method is used for a coaxial transmission line having four sections. Due to the transitions between the sections there exist some reflections. By knowing exact position of reflections one can optimize for better VSWR by introducing compensating steps. This method has been extended for the...
This paper describes the simulation of an axi-symmetric 2-stage depressed collector including the effects of secondary electrons using a 2D FDM based code and compares its efficacy against experimental results and 3D simulation using CST Particle Studio. The paper also demonstrates the 3D simulation of a tilted electric field (TEF) collector using CST Studio for arresting the secondary electron back-migration.
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