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Fabrication was completed on an X-Band multiple beam klystron (MBK) designed to produce 50 MW of RF power in microsecond pulses. The klystron incorporates a confined flow, multiple beam gun where the cathodes are located relatively far from the device axis. This required unique focusing structures to maintain beam quality. The MBK will be tested at Brookhaven National Laboratories.
Magnetron injection guns (MIGs) are a principle component in gyrotrons and gyroklystrons. The performance of the RF device critically depends on the performance of the MIG that provides the electron beam. Unfortunately, recent measurements indicate that MIGS often generate asymmetrical electron beams that can adversely impact the operation of the RF source. This presentation will describe the measurement...
Recent gyrotron operations indicate that nonuniform cathode emission is prevalent in many, if not most, magnetron injection guns. A nonuniform emission can result in degradation of the RF performance and increase heating in the collector. This paper describes research to improve cathode emission by addressing temperature uniformity and work function issues. A new cathode design is proposed, and a...
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