Abstract:
The present invention comprises an x-ray transmission target tube that includes an envelope; x-ray permeable window means disposed at the envelope and forming a part thereof; means for directing a charged particle beam to the window means to generate x-rays thereat; structural means for providing a space at the window means, which structural means comprises an x-ray permeable window element that is disposed opposite the window means and further comprises wall means, which structural means, together with the window means, forms the space; and means for transferring a heat-transfer fluid through the space so as to be in heat transfer relationship with the window means.
Abstract:
An x-ray window can include a thin film that comprises boron. The thin film can be relatively thin, such as for example ≤200 nm. This x-ray window can be strong; can have high x-ray transmissivity; can be impervious to gas, visible light, and infrared light; can be easy of manufacture; can be made of materials with low atomic numbers, or combinations thereof. The thin film can include an aluminum layer. A support structure can provide additional support to the thin film. The support structure can include a support frame encircling an aperture and support ribs extending across the aperture with gaps between the support ribs. The support structure can also include boron ribs aligned with the support ribs.
Abstract:
A radiation window foil is provided for an X-ray radiation window. It includes a continuous window layer with a first side and a second side. A first mesh or grid layer is stacked on or bonded to the first side of the continuous window layer. A second mesh or grid layer is stacked on or bonded to the second side of the continuous window layer.
Abstract:
For manufacturing a radiation window for an X-ray measurement apparatus, and etch stop layer is first produced on a polished surface of a carrier. A thin film deposition technique is used to produce a structural layer on an opposite side of said etch stop layer than said carrier. The combined structure comprising said carrier, said etch stop layer, and said structural layer is attached to a region around an opening in a support structure with said structural layer facing said support structure. The carrier is etched away.
Abstract:
A method of making a high strength carbon fiber composite (CFC) wafer with low surface roughness comprising at least one sheet of CFC including carbon fibers embedded in a matrix. A stack of at least one sheet of CFC is provided with the stack having a first surface and a second surface. The stack is pressed between first and second pressure plates with a porous breather layer disposed between the first surface of the stack and the first pressure plate. The stack is cured by heating the stack to a temperature of at least 50° C.
Abstract:
An X-ray window including a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the window element. To prevent large debris particles from short-circuiting the window element and changing the desired heating pattern, the current for heating the window element flows through a layer which is insulated from the charge-drain layer.
Abstract:
An X-ray window including a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the window element. To prevent large debris particles from short-circuiting the window element and changing the desired heating pattern, the current for heating the window element flows through a layer which is insulated from the charge-drain layer.
Abstract:
An x-ray window comprising a polymer and carbon nanotubes and/or graphene. The carbon nanotubes and/or graphene can be embedded in the polymer. Multiple layers of polymer, carbon nanotubes, and/or graphene may be used. The polymer with carbon nanotubes and/or graphene can be used as an x-ray window support structure and/or thin film.
Abstract:
A multi-energy imaging system and method for selectively generating high-energy X-rays and low-energy X-ray beams are described. A pair of optic devices are used, one optic device being formed to emit high X-ray energies and the other optic device being formed to emit low X-ray energies. A selective filtering mechanism is used to filter the high X-ray energies from the low X-ray energies. The optic devices have at least a first solid phase layer having a first index of refraction with a first photon transmission property and a second solid phase layer having a second index of refraction with a second photon transmission property. The first and second layers are conformal to each other.
Abstract:
A radiation window device to transmit radiation as part of an x-ray source or detector includes a support to be subject to a substantial vacuum, and an opening configured to transmit radiation. A film is mounted directly on the support across the opening, and has a material and a thickness selected to transmit soft x-rays. An adhesive directly adheres the film to the support. A coating covers exposed portions of at least one of the evacuated or ambient sides of the film, and covers a portion of the support surrounding the film. The support, film and adhesive form a vacuum tight assembly capable of maintaining the substantial vacuum when one side is subject to the substantial vacuum. In addition, the vacuum tight assembly can withstand a temperature of greater than approximately 250 degrees Celsius.