Collector for a microwave tube and microwave tube comprising such a collector.

摘要

The invention relates to a collector for gathering the electrons of differing velocity of a beam (21), arranged at the output of an interaction space (24). It comprises a depressed enclosure (23) and an expansion chamber (22) interposed between the interaction space (24) and the depressed enclosure (23). The depressed enclosure (23) is bounded upstream by an entrance wall (30). The expansion chamber (22) is bounded upstream by an entrance wall (28) brought to the potential of the interaction space. The entrance wall (28) of the expansion chamber (22) is provided with an orifice (29) of diameter d. The entrance wall (30) of the depressed enclosure (23) is provided with an orifice (27) of diameter D. The diameter D is greater than twice the diameter d. Applications to microwave tubes such as klystrons and travelling-wave tubes. <IMAGE>