Siemens Aktiengesellschaft

Wilhelm Bibracher

Wolf Wiehler

Franz Gross

Eugen Achter

Josef Hauser

Gerit Boehme

An electron beam catcher for velocity modulated electron tubes which is formed as a two multi-stage collector comprising a plurality of catcher electrodes 1 and 2 surrounding the electron beam and mounted so that one follows the other in the direction of the electron beam axis and the catcher electrodes are electrically insulated from each other and are surrounded by a metallic outer envelope 3. A plurality of semicylindrical insulating parts 4 and 4' extended in the axial direction and are mounted between the catcher electrodes 1 and 2 and the outer metallic cover or vacuum envelope 3 which is heated to cause it to expand and is then shrunk onto the insulator parts 4 and 4' such that the oblong insulator parts 4 and 4' are pressed against the catcher electrodes 1 and 2 and are tightly held by the metallic outer vacuum envelope 3. The electron catcher 15 particularly useful in high powered travelling wave tubes.

Electron beam catcher for velocity modulated electron tubes

A gas-tight, high-frequency permeable window arrangement is provided between the input and output sides of a coaxial line, particularly for traveling wave tubes. The dielectric losses, particularly given high-performance tubes, are held so low that too high a thermal load and, thus, a fracture or, respectively, loss of seal of the window arrangement is avoided. For this purpose, a ceramic hollow cylinder is provided between the coaxial line of the input side and the coaxial line of the output side, the ceramic hollow cylinders surrounding the inner conductor of the coaxial line of the input side in the area of its transition to the coaxial line of the output side as a continuation of the outer conductor of the coaxial line of the input side.

Gas-tight-high-frequency permeable window arrangement in a coaxial line,

An electron beam collector for transit time tubes, in particular traveling wave tubes, includes a plurality of metallic electrodes which surround the electron beam and which are spaced from one another by insulating bodies. The spacing components are firmly and preferably directly connected to the electrodes which they serve to space. The electrodes are, in each case, embraced by a sleeve which has a thermal coefficient expansion that is small in comparison to the electrodes and matched to that of the spacing components.

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Otterloh, Germany

Wilhelm Bibracher