Siemens Aktiengesellschaft

Clemens Fiebiger

Thomas Redel

Erhard Schmidt

Roland Schmidt

Manfred Apel

Björn Österreicher

Wolfgang Hennig

The present embodiments relate to a beam head including a vacuum housing, in which an electron source is arranged. The beam head also includes a beam finger that is connected to the vacuum housing and has an outlet window at a distal end. The beam head includes a transformer housing, in which a transformer connected to the electron source is arranged. The transformer housing is arranged directly on the vacuum housing.

Beam head

In a method for manufacturing a glow cathode for an electron tube, a layer of an alloy, such as iridium-lanthanum (Ir.sub.2 La), is produced on a substrate by coating the substrate, such as in a number of layers, with the components of the alloy by deposition from the vapor phase, such that the components of the alloy are present in the stoichiometrically correct ratio on the substrate, and in that the substrate is heated for a time duration adequate for alloy formation to a temperature that is lower than the melting temperature of the phase of the alloy having the lowest melting point.

Method for manufacturing a glow cathode for an electron tube

In an ultrasound transducer arrangement having an electroacoustic transducer part, at least one acoustic matching layer is allocated to the transducer part. The acoustic matching layer is composed of an electrically conductive skeleton having interspaces connected to one another. The skeleton is constructed of particles connected to one another. The size of the particles is smaller than the wavelength of an acoustic wave in a matching layer, as a result of which no significant scattering of the wave occurs in the matching layer. The interspaces are filled with a curable casting compound.

Ultrasound transducer arrangement having an acoustic matching layer

An electron emitter for an x-ray tube is formed by a geometrical member that is completely filled with electron-emitting material. This emitter can be excited to emit electrons over its entire side facing toward the anode. The electron-emitting material is composed of a mixture of conductive metal powder and a non-conductive powder or a ceramic material. A uniform distribution of the electrons in the focal spot of the anode is obtained in substantially all expected operating conditions of an x-ray tube, so that the x-radiation generated in the focal spot is correspondingly uniform. Further, the electron emitter can be manufactured in a simple manner.

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Erlangen, Germany

Clemens Fiebiger