Abstract:
A rotating anode X-ray tube which comprises an anode facing a cathode hermetically secured to one end of an evacuated envelope, and wherein the anode has a rotary anode target fixed to a rotary shaft. The rotary anode target includes an electron-impact layer having a plane bombarded by electrons emitted from the cathode and a target base on which the electron-impact layer is laminated and the electron-impact layer and target base are joined together on a pair of horizontal faying surfaces substantially perpendicular to the axis of the rotary shaft.
Abstract:
An X-ray generating tube is disclosed, which tube is especially suitable for use in a computerised tomographic apparatus in which a spread of x-radiation is required to shift rapidly relative to the body of a patient under examination. The tube contains a rotating anode which is either reciprocated to-and-fro along the axis of rotation thereof or contains a shaped profile which scans along said axis.
Abstract:
A rotating anode target for X-ray tubes comprising a substrate disc provided with an annular marginal portion having opposed bevel surfaces convergent toward an outer peripheral edge of the disc, one of the surfaces being coated with a layer of X-ray emissive material which extends around the peripheral edge and terminates in an annular feathered edge merging with the opposed bevel surface of the disc.
Abstract:
An X-ray tube includes a rotary anode structure having a rotary target. The target includes an electron receiving layer made of a tungsten based alloy and a substrate made of a molybdenum based alloy containing titanium and/or zirconium in an amount of 0.5 to 2.0% by weight.
Abstract:
A rotary anode of an X-ray tube delivers X-rays from at least the surface struck by electrons and consisting mostly of molybdenum. According to the present invention this surface consists to at least 90 percent of molybdenum and up to 10 percent hafnium.
Abstract:
An X-ray apparatus has an X-ray tube situated in a cover screening the rays. The effective focal point of the X-ray tube is located behind a ray transmitting opening in the cover,-the ray outlet window,-upon a thin layer of difficultly fusible material which itself is carried by an anode body made of ray transmitting material. The present invention is particularly characterized in that this layer is constructed as the ray transmitting anode in that at least parts of its upper surface and of its lower surface lying upon the transmitting supporting material of the anode, are directed toward the ray outlet window and in that the thickness of the layer at least approximately corresponds to the depth of penetration of electrons into the material of the layer at the expected highest acceleration voltage.
Abstract:
A rotating-anode X-ray tube wherein the anode target has a first focal plane made of tungsten and a second focal plane made of molybdenum, rhodium, silver or palladium, there are disposed opposite to said first and second focal planes first and second cathodes in such a manner that each cathode impinges electrons on the corresponding focal plane, the voltage to be impressed on these cathodes can be varied by an external means, and there can be obtained, as required, a hard X-ray from the first focal plane or a soft X-ray from the second focal plane.