A method for the construction of a drift shafts roehre with coupled cavities

摘要

13AbstractImprovements in or relating to Coupled Cavity TravellingWave TubesA millimetre coupled cavity travelling wave tubehas each of its slow wave structures formed of at leastone longitudinally extending member having holes madetherethrough by a hobbing process, which holes con-stitute at least in part the cavities of the slowwave structure. In a preferred embodiment a one and oneonly such longitudinally extending member is provided,the holes therein each a whole cavity. The hobbing issuch that a buttress is left outstanding from eachcavity facing surface of a cavity separating wall andthe beam hole is bored axially through said memberfrom end to end through said buttresses. Aftermachining of the cavity coupling holes in the cavityseparating walls (e.g. by spark erosion) the cavitiesare closed by plates brazed to opposite faces ofthe member.