PROJECT TITLE :
Partially Grounded Depressed Beam Collector
A completely unique depressed beam collector concept is described that can be relevant for klystrons and different linear beam tubes. Along with the standard collector component or elements biased negatively to recover unspent-beam energy, a grounded component is introduced to collect mirrored primary and backsteaming secondary electrons that, on account of transverse deflection, will be prevented from returning toward the cathode. A theoretical and simulation analysis is presented leading to the estimations of efficiency for this configuration, with examples that apply to a recently demonstrated -band multibeam klystron. Efficiencies are predicted to be significantly higher for tubes employing partially grounded depressed collectors (DCs) than for tubes using the conventional DCs.
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