Abstract
The objectives of the development program to be described are an output power of 100-kw CW at 8 GHz, an efficiency in excess of 30%, and an instantaneous 3-dB bandwidth in excess of 3%. The design chosen was an extended-interaction klystron (EIK) with a three-gap 2π-mode output resonator. A two-gap uncoupled cavity pair was chosen as the penultimate resonator. The cavity pair was utilized to maintain greatest attainable efficiency over the entire bandwidth of the tube. Conventional tunable single-gap resonators were used in the low level buncher portion of the tube.
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