Abstract:
Some embodiments include a ring anode to emit radiation, and a conical monochromator to monochromatize the emitted radiation. According to some aspects, an outer diameter of the ring anode is greater than an outer diameter of a base of the monochromator.
Abstract:
By arranging for a collection of different materials to be used as x-ray targets in a single x-ray generator tube, an X-ray generator that can transmit a collection of unique x-ray spectra is produced according to one embodiment of the present invention. Spectrum selection can be accomplished by electronic means (with great speed) by deflecting an electron beam by means of electric fields, magnetic fields, and any combination of the two.
Abstract:
A device for generating an x-ray point source includes a target, and an electron source for producing electrons which intersect with the target to generate an x-ray point source having a size which is confined by a dimension of the target.
Abstract:
An apparatus is provided for delivering x-ray radiation to interior surface tissue of a body cavity. The apparatus comprises a flexible introducer guide having a distal end and a proximal end, the distal end for insertion into the body cavity. An inflatable balloon is mounted proximate the distal end of the flexible introducer guide and is selectively inflated to conform the balloon to the body cavity. A flexible x-ray catheter is configured for movement within the introducer guide, and an x-ray emitter is coupled to the distal end of the x-ray catheter for generating x-rays to irradiate the interior surface tissue. The x-ray emitter is also coupled to a source of high voltage. A controller is coupled to the x-ray emitter to control the area of irradiation and the dosage of radiation generated by the emitter.
Abstract:
An x-ray generating device includes at least one field-emission cathode having a substrate and incorporating nanostructure-containing material including carbon nanotubes. The device further includes at least one anode target. Associated methods are also described.
Abstract:
An EUV radiation source that creates a stable solid target filament. The source includes a nozzle assembly having a condenser chamber for cryogenically cooling a gaseous target material into a liquid state. The liquid target material is forced through an orifice of a target filament generator into an evaporation chamber as a liquid target stream. The evaporation chamber has a higher pressure than a vacuum process chamber of the source to allow the liquid target material to freeze into a target filament in a stable manner. The frozen target filament is emitted from the evaporation chamber into the process chamber as a stable target filament towards a target area. The higher pressure in the evaporation chamber can be the result of the evaporative cooling of the target material alone or in combination with a supplemental gas.
Abstract:
The present invention concerns x-ray sources for mammography. A microfocused x-ray source of small size (30 nullnullm and smaller) with x-ray spectrum optimized for enhanced mammography is obtained with a method and system according to the invention. The proposed x-ray source is based on the use of plasmas created by the energy distribution of suprathermal electrons that are produced during the interaction of the laser beam with a solid target. These hot electrons penetrate the surface layer of cold plasma and interact with the solid core of the target. The method and system according to the present invention allows optimizing the x-ray source size, its spectral distribution, and the conversion efficiency in the 17.3-28 5 keV range (adapted to the breast thickness).
Abstract:
In laser-plasma generation, a fluid of target material is jet out to form a jet tube target 21 having a diameter null and a wall thickness null with a shell and a hollow space within the shell by using a core-column. A plurality of pulse-like laser beams 30 are directed to the jet tube target radially and equiangularly-spaced directions and are simultaneously focused and irradiated onto the jet tube target to generate the plasma.
Abstract:
A gas curtain device is employed to deflect debris that is generated by an extreme ultraviolet and soft x-ray radiation discharge source such as an electric discharge plasma source. The gas curtain device projects a stream of gas over the path of the radiation to deflect debris particles into a direction that is different from that of the path of the radiation. The gas curtain can be employed to prevent debris accumulation on the optics used in photolithography.
Abstract:
A cathode for a miniature X-ray device includes an insulating shell, a cathode and an anode. The cathode includes a focusing cup formed into an end. The focusing cup can include a thin metal layer that conforms to an inner surface of the cathode. An emitting material having a low work function, such as diamond, is deposited directly onto the internal surface of the focusing cup. The anode has a flat receiving surface for collecting electrons emitted from the anode. An interior coating is applied as a circumferential belt on the interior surface of the insulating shell. The interior coating, formed of a negative secondary emission yield material, extends lengthwise in the region of the cathode to an anode gap, covering the region of the insulating shell most likely to be subject to stray electrons emitted from the cathode.