A target for generating x-rays includes at least one substrate including a first material and a plurality of discrete structures including at least one second material configured to generate x-rays in response to electron bombardment. The discrete structures are distributed across a first surface of the at least one substrate in an array pattern function A that has a corresponding function B such that a combination operation of the array pattern function A with the corresponding function B generates a resultant function C comprising a first portion with a single peak and a substantially flat second portion surrounding the first portion. The combination operation includes a cross-correlation operation or a convolution operation

Fabrication of a multi-layer X-ray source is disclosed using bulk structures to fabricate a multi-layer target structure. In one implementation, layers of X-ray generating material, such as tungsten, are interleaved with thermally conductive layers, such as diamond layers. To prevent delamination of the layers, various mechanical, chemical, and/or structural approaches may also be employed.

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.

An X-ray source target includes a structure configured to generate X-rays when impacted by an electron beam. The structure has an X-ray generating layer comprising X-ray generating material, and a thermally-conductive layer is adjacent to and in thermal communication with the X-ray generating layer. A stress relieving layer is adjacent to the thermally-conductive layer. The thermally-conductive layer is sandwiched between the X-ray generating layer and the stress relieving layer.

A radiation emitting target, a radiation generating device, and a radiography system are provided in which adhesion between a target layer and a diamond substrate is improved and stable radiation emitting properties are exhibited. A transmission type target includes a target layer, a carbon-containing region including sp2 bonds, and a diamond substrate that supports the target layer. The carbon-containing region is positioned between the target layer and the diamond substrate.

An x-ray anode for generating x-radiation includes a carrier body and a first emission layer and at least one second emission layer, which generate x-radiation when they are impinged by electrons. The emission layers are separated by an intermediate layer on one side of the carrier body and are arranged a distance apart in a central direction of the x-ray anode.

A radiation emitting target, a radiation generating device, and a radiography system are provided in which adhesion between a target layer and a diamond substrate is improved and stable radiation emitting properties are exhibited. A transmission type target includes a target layer, a carbon-containing region including sp2 bonds, and a diamond substrate that supports the target layer. The carbon-containing region is positioned between the target layer and the diamond substrate.

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.

A transmission-target x-ray tube can include an x-ray window mounted on a window-housing. The window-housing can be made of a high density material (e.g. 12 g/cm.sup.3) with a high atomic number (e.g. 45), and can include an aperture with an increasing-inner-diameter region, with a smaller diameter closer to the electron-emitter and a larger diameter closer to the window-mount, for blocking x-rays and electrons. An example angle in the increasing-inner-diameter region is between 15 degrees and 35 degrees. The x-ray tube can further comprise a window-cap. The x-ray window can be sandwiched between the window-housing and the window-cap. The window-cap can be made of a high density material (e.g. 12 g/cm.sup.3) with a high atomic number (e.g. 45) for blocking x-rays in undesirable directions, and can include an aperture for allowing x-rays to transmit in desirable directions.

An anode for an X-ray tube can include one or more of an yttrium-oxide derivative, titanium diboride, boron carbide, titanium suboxide, reaction-bonded silicon carbide, and reaction-bonded silicon nitride. Upon collision with an anode, the kinetic energy of an electron beam in an X-ray tube is converted to high-frequency electromagnetic waves, i.e., X-rays. An anode from one or more of the above materials and a gradient distribution of conductive metals can reduce costs and/or weight, extend the life of the anode or associated components (e.g., bearings) and simultaneously provide a higher heat storage capacity as compared to traditional molybdenum and tungsten anodes.