| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem wherein effect of efficiency improvement of a microwave tube that is enhanced by making the electric potential of a collector lower than that of an interaction part, is limited due to existence of some electrons that are pulled back to the interaction part caused by potential difference between the collector and the interaction part. SOLUTION: A collector structure is composed of the interaction part 5 having electron beam passing hole 8 installed at the center, the collector electrode 1 installed at the extension part of the tube axis of the electron passing hole 8 that collects (recovers) the electrons from the interaction part 5, and an insulation support column 3 that supports the outer wall of this collector electrode 1 and that of the interaction part 5. In the structure, a part of the outer wall of the collector electrode 1 in the vicinity of the tube axis where the electron beam passes through is protruded, while the outer wall of the interaction part 5 is recessed in the periphery opposed to this protrusion part 2, so that a part of the electrons from the interaction part 5 is made to be captured by the protrusion part 2 of the collector electrode 1. COPYRIGHT: (C)2005,JPO&NCIPI
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