U.S. Philips Corporation

Rudolf Bachmor

Horst Seifert

Bernd Offerman

A multistage collector for electron-beam tubes, in particular for klystrons, comprising a plurality of electrode rings (7 to 11 ) which are arranged one behind the other in the direction of the electron beam and which are connected to gradually decreasing electric potentials, and comprising insulating ceramic spacer rings (12 to 16) which interconnect adjacent electrode rings (7 to 11) in an electrically insulating vacuum-tight manner. Flashovers between the collector stages are precluded in that radially outwardly extending first ring-shaped metal casings (19, 20), which can be manufactured in a simple manner are soldered in a vacuum-tight manner to the end regions of the spacer rings (12 to 16), and in that second ring-shaped metal casings (21, 22) are soldered in a vacuum-tight manner to the electrode rings (7 to 11), an annular disc area (21a, 22a) of each of said ring-shaped casings engaging an associated annular disc area (19a, 20a) of a first ring-shaped casing (19, 20) and said annular disc areas being welded together in a vacuum-tight manner, so that two welding collars are formed, and in that the ambient air-accessible outer surfaces of the ring-shaped metal casings (19 to 22) and hence the welding collars are covered by an insulating material.

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Quickborn, Germany

Rudolf Bachmor