Speaker
Description
The RF gridded cathode is one of the key components of the FCCee RF power source called Tristron. It enables generation of the bunched electron beams with application of RF oscillation in the cathode-grid gap. This approach allows a compact tube architecture and provides high RF power production efficiency in combination with a special tristron RF circuit. The emitted, intercepted, and transmitted beam currents are governed by the applied RF grid voltage, providing additional degrees of freedom for controlling the bunch formation. For continuous-wave Tristron operation at 0.5MW RF power level in L-band, particular attention should be paid to several critical design aspects, including beam–grid interception, beam optics design, thermomechanical effects and stress. These factors strongly influence the operational stability, device lifetime, and overall performance of the Tristron. Current status of the RF gridded cathode design for the Tristron will be reported.
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