Abstract:
A solid X-ray target (100) for generating X-ray radiation is disclosed. The X-ray target comprises at least one material (101) selected from a list including trivalent elements; and at least one material (102) selected from a list including pentavalent elements, wherein a first one of said materials is capable of generating the X-ray radiation upon interaction with an electron beam, and a second one of said materials forms a compound with the first one of said materials. An X-ray source comprising such an X-ray target and an electron source (200) is also disclosed.
Abstract:
Target assembly for an x-ray emission apparatus comprise a vacuum chamber (91) with at least one conductive wall (92). The assembly comprises an insulating element (93) projecting through the conductive wall and high voltage element may extending along the insulating element. The high voltage element may extend from outside the chamber. The high voltage element extends to an end portion of the insulating element furthest from the conductive wall. The assembly comprises an x-ray-generating target arranged at the end portion of the insulating element and electrically connected to the high voltage element. The assembly comprises a suppressive electrode (19). This suppressive electrode is be arranged at the end portion of the insulating element. This suppressive electrode is configured to suppress the acceleration of electrons which are emitted from a junction between the outer surface of the insulating element and an inner surface of the conductive wall towards the outer surface of the insulating element. An x-ray emission apparatus is also disclosed. The x-ray emission apparatus may comprise the target assembly. The apparatus may comprise an electron beam apparatus. The electron beam apparatus may be arranged to accelerate a beam of electrons towards an x-ray-generating target. The x-ray emission apparatus may thereby generate x-ray radiation.
Abstract:
An x-ray collimator comprising: a substrate (10) containing a plurality of holes (30), each hole being frustoconical (40) at one end and tubular (50) at the other end for use in an x-ray imaging system, whereby the x-ray collimator is aligned with a two-dimensional array of x-ray sources (70) and a two-dimensional x-ray sensor (130), whereby x-ray photons from the x-ray sources pass through the collimator holes and emerge as a beam of x-ray photons in a narrow angle cone which pass through the subject (110) being imaged, positioned between the output holes of the collimator and the x-ray sensor.
Abstract:
An apparatus comprises a charged particle beam source and a target (1) for a charged particle beam. The target comprises a concave outer surface which is at least a segment of a cylinder (2) having a periodically structured surface (4). The charged particle beam is directed parallel to the axis of the cylinder (2), with the distance of the charged particle beam from the surface being less than or equal to twice the period of the periodically structured surface (4) in a direction perpendicular to the charged particle beam. The width of the charged particle beam in a direction perpendicular to the charged particle beam and parallel to the outer surface of the target is less than twice the period of the periodically structured surface (4) in a direction perpendicular to the charged particle beam.
Abstract:
In one example embodiment, an anode suitable for use in an x-ray tube includes a hub, a front side, and a target surface disposed on the front side. The hub is configured to attach to a bearing assembly and the front side substantially faces the bearing assembly. The anode further includes a rear side substantially opposite the front side, as well as two or more annular anode fins extending from the rear side. The annular anode fins are positioned radially outward from the hub to an outer periphery of the rear side.
Abstract:
Gegenstand der Erfindung ist eine Röntgenstrahlungsquelle, in der insbesondere monochromatische Röntgenstrahlung erzeugt werden kann. Außerdem betrifft die Erfindung ein Verfahren zum Erzeugen von Röntgenstrahlung sowie eine Verwendung der Röntgenstrahlungsquelle zur Durchleuchtung von Körpern. Erfindungsgemäß ist vorgesehen, dass in einem Gehäuse (19) eine Metallfolie als Target (11) vorgesehen ist, die mit dem Elektronenstrahl (13) beschossen wird. Hierdurch wird diese zur Aussendung monochromatischer Röntgenstrahlung (18) angeregt, wobei sich hierbei das verhältnismäßig dünnwandige Target (11) soweit verändert, dass der bestimmungsgemäße Gebrauch zur Erzeugung monochromatischer Röntgenstrahlung nicht mehr möglich ist. Deswegen ist vorteilhaft vorgesehen, dass sowohl die Erzeugungseinrichtung (26) für den Elektronenstahl geschwenkt werden kann als auch das Target über Rollen (28, 29) gewickelt werden kann.
Abstract:
In a target structure (100) according to the present invention, a target (102) is provided on a central area of an insulating substrate (101), and a first conductive member (103a) for supplying a voltage to the target is provided on a peripheral area of the insulating substrate which is exclusive of an area overlapping the target and is not covered by the target, so that the first conductive member is in contact with and electrically connected to the peripheral portion of the target. Consequently, it is possible to easily form a voltage supply line to the target without preventing diffusion of a heat generated in the target to the substrate and while suppressing emission of an unnecessary X- ray.
Abstract:
Direct write electron-beam-to-x-ray converters are described, which may be programmed to focus x-rays into an arbitrary shape to provide spatial and intensity modulation to irradiate a malady such as a tumor. An integrated structure of the electron beam to x-ray converter comprises a collimating grid containing a target fluid. The collimating grid comprises a plurality of individual cells enclosed in a housing assembly. An electron beam aimed at a selected individual cell of the collimating grid may be converted to an x-ray beam within the target fluid.