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In order to study the nonlinear beam-wave interaction for sheet beam klystrons more efficiently, a calculation code of SBK2D based on a 2D rod shaped macro-particle model is developed and used to simulate and analyze a high power W-band sheet beam klystron with 8 multiple gap barbell cavities. More than 50kW high frequency output with the efficiency of 20% and gain of 38 dB are observed, and the results...
Pseudospark electron beams of micro-sizes have been measured recently and their application to millimeter-wave and terahertz radiation generation is being investigated. A three cavity 94 GHz klystron using a micro-sized beam has been designed and simulated and is currently being constructed.
It is important to keep the frequency of higher-frequency operating mode twice or triple as large as that of the lower-frequency operating mode in the dual-frequency operation terahertz coaxial gyrotron with two electron beams. From the practical point of view, the effects of a possible tilted or shifted inner rod of a coaxial gyrotron cavity on the ohmic loss distribution, the resonant frequency,...
Using a cavity based on a periodic-surface-lattice (PSL) the concept of a high-power, 200GHz Cherenkov source is developed. If the PSL satisfies certain defined conditions single mode operation is observed.
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