Abstract:
The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
Abstract:
The present disclosure relates to the production and use of a multi-layer X-ray source target. In certain implementations, layers of X-ray generating material may be interleaved with thermally conductive layers. To prevent delamination of the layers, various mechanical, chemical, and structural approaches are related, including approaches for reducing the internal stress associated with the deposited layers and for increasing binding strength between layers.
Abstract:
X-ray sources and production of X-rays, in particular, producing monochromatic x-rays is provided. More specifically, a method for producing X-rays and the use of the X-ray source for x-raying bodies (for example human bodies). An aerogel, for example in the form of a rod, may be provided in a housing as a target. Said target may be bombarded with an electron beam, the aerogel being vaporized due to the extreme low density and the high energy. As a result, the target is guided by means of a roller such that an unused target for producing, in particular, the monochromatic X-rays, is always available.
Abstract:
An anode with a linear main direction of extent for an x-ray device, has an anode body and a focal track layer, which is connected to the anode body in a material-bonding manner on a focal track layer volume portion of the anode body. At least one cooling channel for the cooling of the anode body and the focal track layer is arranged in the interior of the anode body and at least the focal track layer volume portion is formed of a material with at least a basic matrix of refractory metal. The focal track layer volume portion extends as far as to the cooling channel.
Abstract:
The present invention provides a transmission type radiation generating target which can suppress the exfoliation or the crack of a target layer in an interface between a supporting substrate and the target layer, even when the density of incident electrons has been enhanced or the potential of the target has been enhanced. The transmission type radiation generating target includes a supporting substrate, and a target layer which is arranged on the supporting substrate and generates radiation in response to irradiation with an electron beam, wherein the target layer has an opening through which the supporting substrate is exposed, and the opening overlaps with a position at which the density of the irradiation with the electron beam is maximum.
Abstract:
The present invention refers to hybrid anode disk structures for use in X-ray tubes of the rotary anode type and is concerned more particularly with a novel light weight anode disk structure (RA) which comprises an adhesion promoting protective silicon carbide (SiC) interlayer (SCI) deposited onto a rotary X-ray tube's anode target (AT), wherein the latter may e.g. be made of a carbon-carbon composite substrate (SUB′). Moreover, a manufacturing method for robustly attaching a coating layer (CL) consisting of a high-Z material (e.g. a layer made of a tungsten-rhenium alloy) on the surface of said anode target is provided, whereupon according to said method it may be foreseen to apply a refractory metal overcoating layer (RML), such as given e.g. by a tantalum (Ta), hafnium (Hf), vanadium (V) or rhenium (Re) layer, to the silicon carbide interlayer (SCI) prior to the deposition of the tungsten-rhenium alloy. The invention thus leverages the tendency for cracking of the silicon carbide coated carbon composite substrate (SUB′) during thermal cycling and enhances adhesion of the silicon carbide/refractory metal interlayers to the carbon-carbon composite substrate (SUB′) and focal track coating layer (CL) by an interlocking mechanism. Key aspects of the proposed invention are: a) controlled formation of coating cracks (SC) in the silicon carbide layer (SCI) and b) conformal filling of SiC crack openings with a refractory metal.
Abstract:
Stationary x-ray target assemblies manufactured using a metal deposition process to form one or more metal layers of the target. In particular, the metal deposition process is used to form an x-ray target metal layer and/or a stress buffer zone on an x-ray target substrate. The stress buffer zone improves material properties of the metals and/or the bonding between the x-ray target metal layer and the substrate. Improved bonding between the x-ray target metal layer and the substrate also improves the heat dissipation properties of the stationary x-ray target assembly.
Abstract:
The x-ray target assemblies have an oxide dispersion strengthened (ODS) refractory metal alloy substrate that is bonded to a carbon-containing heat sink. The x-ray target assemblies have excellent bonding between the substrate and the heat sink. The improved bonding is achieved by placing an oxide-free barrier layer between the ODS metal substrate and the heat sink. The oxide-free barrier layer minimizes or eliminates chemical reactions that would otherwise be possible between the dispersed oxides and the carbon-based heat sink during the manufacturing process. Preventing these undesired reactions while manufacturing the x-ray target assembly yields a device with improved bonding between the heat sink and the substrate, compared to devices manufactured without the barrier layer.
Abstract:
The present invention provides an electrode, typically an anode, for use in an x-ray generating apparatus comprising an electron source. The electrode comprises a housing, a diamond member mounted to the housing, and a target located on the diamond member, which target in use is bombarded with electrons from the electron source so as to generate x-rays. A bonding layer is located between the housing the diamond member, which bonding layer comprises an alloy having a solidus or melting point of less than 900° C. A particularly preferred alloy comprises silver, copper and indium. This arrangement assists in dissipating heat generated at the electrode surface whilst retaining the structural integrity of the electrode.