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In any TWT design, understanding of potential spurious oscillation characteristics is critical to achieve optimal amplifier performance and, more importantly, to avoid the unpleasant surprise of discovering problems after the fact. This paper serves to illustrate these oscillation characteristics and to discuss potential mitigation approaches with special emphasis on serpentine/folded-waveguide TWTs...
A multi-beam monotron oscillator that has four-gap cavity and which is excited in-phase oscillation was numerically investigated. As a result of numerical calculations and optimization the capability obtaining in such device on a frequency 2450 MHz high electron efficiency (60%) was shown.
MILO has been analyzed for its beam wave interaction and the RF released energy has been calculated. The analytical results are obtained, typically, for a S-band MILO, and released RF energy is found as 2.5 Joule at 300 kV applied voltage. The analytical results has also been validated through PIC simulation code MAGIC and found to be in close agreement.
The present report examines both analytically and numerically by using a two-dimensional electromagnetic solver the frequency tuning characteristics and electric-field patterns in a two-celled system consisting of cylindrical cavities coupled by a circular iris. It is shown that the presence of the iris introduces unique features not found in hollow circular cavities, namely, the occurrence of flat...
The two-fold enhancement in the conversion efficiency of a monotron operating in the pi mode-instead of the TM010 mode for which the efficiency is limited to 20 percent-arises from a phase synchronization process due the action of RF electric fields of reversed signs in each partition of the bisected cavity.
In this paper, we present a novel ultra-fast material inspection system for continuously streaming dielectric materials, such as paper, plastic films, non-aqueous liquids etc. The material stream is being passed through a cavity resonator whose electrical parameters are altered by the presence of the material, due to its interaction with the electric field inside the resonator. The latter is employed...
Striations are a common occurrence in plasma science. Striations are a poorly understood but very elegant phenomenon that we observed in a low-pressure RF-driven argon plasma.
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