A system for x-ray analysis includes at least one x-ray source configured to emit x-rays. The at least one x-ray source includes at least one silicon carbide sub-source on or embedded in at least one thermally conductive substrate and configured to generate the x-rays in response to electron bombardment of the at least one silicon carbide sub-source. At least some of the x-rays emitted from the at least one x-ray source includes Si x-ray emission line x-rays. The system further includes at least one x-ray optical train configured to receive the Si x-ray emission line x-rays and to irradiate a sample with at least some of the Si x-ray emission line x-rays.

System and method for nanoscale X-ray imaging of biological specimen. The imaging system comprises an X-ray source including a plurality of spatially and temporally addressable electron sources, an X-ray detector arranged such that incident X-rays are oriented normal to an incident surface of the X-ray detector and a stage arranged between the X-ray source and the X-ray detector, the stage configured to have mounted thereon a biological specimen through which X-rays generated by the X-ray source pass during operation of the imaging system. The imaging system further comprises at least one controller configured to move the stage during operation of the imaging system and selectively activate a subset of the electron sources during movement of the stage to acquire a set of intensity data by the X-ray detector as the stage moves along a three-dimensional trajectory.

The invention relates to a metal jet x-ray tube which is less affected by the problem of the power density at the point of impact of the electron beam on the anode component than conventional tubes. For this purpose the metal jet x-ray tube has a metal jet (6) as anode component (7), which metal jet is so thin that an electron beam (4) impinging on the metal jet (6) is only partially decelerated by the metal jet. Furthermore a blade cathode is provided as a cathode component (3), which blade cathode comprises a cathode blade (10) directed with a slight inclination downwards in the direction of the liquid metal jet (6) of the anode component (7).

A method for generating an x-ray image in color includes selecting three-sets of x-ray images in gray scale acquired with x-rays having different energy spectra, assigning basic colors RGB to the three-sets, and displaying the x-ray image in color with RGB signals generated. A system for generating an x-ray image in color includes an x-ray generator configured to generate at least three sets of x-rays with different energy spectra, an x-ray detector, a controller, a computer, and a color display. The computer is configured to generate three sets of x-ray images from output data of the x-ray detector acquired for x-rays with different energy spectra, assign RGB and display an x-ray image in color. A non-transitory computer readable medium stores an instruction, when the instruction is executed by a processor, cause the processor to perform the method for generating an x-ray image in color.

An electron emission source includes a cathode electrode having a recess region formed in an upper portion thereof and the yarn emitter having a tip shape and provided in the recess region of the cathode electrode. The yarn emitter is spaced from an inner surface of the recess region of the cathode electrode.

Provided is an X-ray imaging device and a driving method thereof, the X-ray imaging device including an electron beam generation unit including a plurality of nano-emitters and a cathode, a first focusing electrode configured to focus an electron beam emitted from the electron beam generation unit, a deflector configured to deflect the electron beam focused by the first focusing electrode, a limited electrode configured to limit traveling of the electron beam deflected by the deflector, and an anode configured to be irradiated with the electron beam to emit an X-ray, wherein the limited electrode includes a limited aperture which the electron beam pass.

The present disclosure provides a method of manufacturing a carbon nanotube electron emitter, including: forming a carbon nanotube film; performing densification by dipping the carbon nanotube film in a solvent; cutting an area of the carbon nanotube film into a pointed shape or a line shape; and fixing the cutting area of the carbon nanotube film arranged between at least two metal members to face upwards with lateral pressure.

An electron source is formed on a silicon substrate having opposing first and second surfaces. At least one field emitter is prepared on the second surface of the silicon substrate to enhance the emission of electrons. To prevent oxidation of the silicon, a thin, contiguous boron layer is disposed directly on the output surface of the field emitter using a process that minimizes oxidation and defects. The field emitter can take various shapes such as pyramids and rounded whiskers. One or several optional gate layers may be placed at or slightly lower than the height of the field emitter tip in order to achieve fast and accurate control of the emission current and high emission currents. The field emitter can be p-type doped and configured to operate in a reverse bias mode or the field emitter can be n-type doped.

A device for generating a source current of charge carriers by a field emission and a method stabilizing a source current of charge carriers emitted by a field emission element are disclosed. In an embodiment the device includes at least one field emission element from which the charge carriers emerge during operation, which lead to an emission current in the field emission element, at least one extraction electrode in order to extract the charge carriers from the field emission element, wherein a first part of the extracted charge carriers contributes to the source current, and a second part of the extracted charge carriers impinges on the extraction electrode and leads to an extraction current in the extraction electrode, an additional electrode on which the source current of charge carriers impinges at least in part and which contributes to an electrode current in the additional electrode.

A thermionic emission device includes an indirectly heatable main emitter with a main emission surface and a connectible heat emitter with a heat emission surface. The heat emission surface is disposed at a predefinable distance from the main emission surface. In the operating state, the main emitter is at a constant main potential and the heat emitter can be switched between at least two heating potentials which differ from one another and which differ from the main potential. Through the use of the thermionic emission device, the radiation load for a patient is reduced in the case of dose-modulated x-ray recordings.