Abstract:
An x-ray laminography imaging system that utilizes a nonplanar anode target to enable objects that are oblique to the direction of projection of electron beams onto the target to be precisely imaged. Because many objects that laminography techniques are used to inspect are oblique or have portions that are oblique, the nonplanar anode target of the present invention enables enables spot patterns to be traced that are parallel to the plane of the object, regardless of whether it is oblique or orthogonal.
Abstract:
The invention relates to a device for generating X-rays (31). The device has a source (5) for emitting electrons (27) accommodated in a vacuum space (3). The X-rays are emitted by a liquid metal as a result of the incidence of the electrons. The liquid metal flows through a constriction (13) where the electrons emitted by the source impinge upon the liquid metal. The constriction is bounded by a thin window (23), which is made from a material which is transparent to electrons and X-rays and which separates the liquid metal in the constriction from the vacuum space, and by a wall (25) opposite to the window. According to the invention, the wall (25) has a profile (p) which matches a profile (p′) which the window (23) has, during operation, as a result of a deformation of the window caused by a pressure of the liquid metal in the constriction (13). Thus, it is achieved that the constriction has a predetermined intended cross-sectional area, and a decrease of the flow velocity and an accompanying excessive increase of the pressure at the location of the deformation of the window are prevented.
Abstract:
An x-ray tube has a stationary vacuum housing, in which are arranged an electron-emitting cathode and a ring anode with an impact surface on which the electron beam, accelerated by an electrical field, is incident, as well as a deflection system to focus and deflect the electron beam. The ray exit window of the x-ray tube is round, lies in the plane perpendicular to the central axis of the x-ray tube, and terminates one side at the vacuum housing. The impact surface of the ring anode is beveled and is aligned to the ray exit window. A diaphragm is provided in front of the ray exit window that defines a circular opening for the x-ray radiation. The ring anode is surrounded by an annular anode cooling arrangement.
Abstract:
An anode assembly having multiple target electrodes is disclosed. Each target electrode produces an x-ray fan beam for radiographic data acquisition. The target electrodes are designed to sequentially generate an x-ray fan beam and therefore operate at a proportional duty cycle per scan. Power output capabilities of the anode assembly is increased without an increase in the size or thermal overloading of the anode assembly.
Abstract:
An x-ray target assembly including a housing having a recess, a cooling fluid contained within the recess and an x-ray target attached to the housing, wherein the x-ray target does not directly contact the cooling fluid.
Abstract:
A metal x-ray device component is provided that includes a high emissivity inorganically bonded ceramic coating that can be applied with minimal surface preparation and that provides good resistance to corrosion and oxidation of substrates in high temperature, vacuum environments. The coating has good dielectric properties, is stable in the high temperature, vacuum environment characteristic of x-ray devices, and provides effective and reliable performance over a wide range of operating temperatures.
Abstract:
An X-ray tube 1 comprises of a valve 10 joined to an envelope main body 4 at one end side thereof and having an inner cylinder portion 10a extending inwardly at the other end side thereof, a metal tube 11 having an extension portion 11a abutting against the inner cylinder portion 10a on the outer periphery of one end side thereof and projecting to the outside of the valve 10 through the inner cylinder portion 10a at the other end side thereof, and a target supporter 12 supporting a target T at the one end side thereof and inserted into the metal tube 11 at the other side thereof. The inner cylinder portion 10a of the valve 10 and the extension portion 11a of the metal tube 11 are fuse-bonded to each other, and the target supporter 12 is welded to the end portion of the metal tube 11 projecting from the valve 10.
Abstract:
The invention relates to an x-ray anode and a process for its manufacture. The x-ray anode is characterized in that the anode material is embodied as a layer on a diamond window. The x-ray anode is preferably used with x-ray units which require as selective as possible x-radiation production to achieve as high as possible radiation intensity. Use in x-ray microscopes in which a high radiation intensity guarantees the highest resolutions is particularly preferred.
Abstract:
An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device.
Abstract translation:x射线产生装置包括至少部分地由具有至少4A / cm 2的发射电子密度的纳米结构材料形成的场致发射阴极。 由于容易聚焦冷阴极发射电子并显着降低阳极的加热,因此实现了高能量转换效率和紧凑设计。 此外,通过在阴极和栅极或阳极之间脉冲电场并将电子束聚焦在不同的阳极材料处,可以从单个器件产生具有变化能量的脉冲X射线辐射。
Abstract:
An x-ray transmission target assembly is disclosed. According to an aspect of the invention, an x-ray target assembly comprises an x-ray generating layer, a thermal buffer, and a support, wherein the thermal buffer is disposed between the x-ray generating layer and support. Another aspect of the invention is directed to a novel material for use as an x-ray generating layer in an x-ray target assembly.