In an embodiment a radiation window for a radiation detector or a radiation source includes a window element and a first protection film, wherein the first protection film at least partially covers a first main surface of the window element facing away from the detector or the radiation source, wherein the first protection film increases a robustness of the window element, wherein the window element is configured to sustain a pressure difference of at least 1 atm, and wherein a ratio between a Young's modulus and an indentation modulus of the window element is between 0.5 and 2.

X-rays can be used for material identification. X-ray beam purity, target adhesion the x-ray window, and a robust hermetic seal of the x-ray window are useful. To achieve these objectives, a target 17 can be mounted by an adhesion-layer 16 on the x-ray window. The adhesion-layer 16 can include chromium. A sealing-layer 13 can seal the x-ray window to a flange 19. Material of the sealing-layer 13 can be different from material of the adhesion-layer 16. There can be a gap 21 between the flange 19 and the target 17. There can be a conductive-layer 18 on the x-ray window 14 in the gap 21. A thickness Ts of the adhesion-layer 16 between the sealing-layer 13 and the x-ray window 14 can be different than a thickness Tt of the adhesion-layer 16 between the target 17 and the x-ray window 14.

In an embodiment a X-ray tube includes an anode, a cathode, an electron emitter for generating free electrons, and an electron optics. The electron emitter is arranged in an emitter recess of the cathode. The electron optics is arranged at the recess and includes an opening such that the electron emitter is accessible in the opening. The opening widens in an acceleration direction of the free electrons.

In an embodiment a X-ray tube includes an anode, a cathode, an electron emitter for generating free electrons, and an electron optics. The electron emitter is arranged in an emitter recess of the cathode. The electron optics is arranged at the recess and includes an opening such that the electron emitter is accessible in the opening. The opening widens in an acceleration direction of the free electrons.

At least some example embodiments relate to an X-ray rotating anode, an X-ray tube and an X-ray emitter. The inventive X-ray rotating anode has a carrier including at least one of molybdenum or a molybdenum alloy; a first focal path on the carrier; and a second focal path on the carrier, wherein at least one of the first focal path or the second focal path comprises at least one of tungsten or rhenium, at least one of the first focal path or the second focal path are embodied on the carrier via a vacuum plasma spraying (VPS) coating method, and the first focal path and the second focal path are distanced from one another via an intermediate section in the carrier between the first focal path and the second focal path.

A mounted x-ray window has an x-ray window mounted on a flange of a housing and spanning and covering an aperture. The x-ray window includes one or more layers each having a low atomic number less than 14. An additive passivation film is associated with the x-ray window and has a thickness greater than 5 nanometers (nm) and less than a thickness of each of the one or more layers. The additive passivation film can be deposited by atomic layer deposition.

A mounted x-ray window has an x-ray window mounted on a flange of a housing and spanning and covering an aperture. The x-ray window includes one or more layers each having a low atomic number less than 14. An additive passivation film is associated with the x-ray window and has a thickness greater than 5 nanometers (nm) and less than a thickness of each of the one or more layers. The additive passivation film can be deposited by atomic layer deposition.

Various systems are provided for a cathode of an X-ray imaging system. In one example, a shield assembly for a cathode comprises a first shield part and a second shield part, the first shield part and the second shield part spaced apart such that the first shield part and the second shield part are not in direct physical contact.

Various systems are provided for a cathode of an X-ray imaging system. In one example, a shield assembly for a cathode comprises a first shield part and a second shield part, the first shield part and the second shield part spaced apart such that the first shield part and the second shield part are not in direct physical contact.

The present disclosure relates to an X-ray generating apparatus capable of providing an X-ray image and an X-ray system using the same, including: a field emitting part having a plurality of electron beam emitting regions arranged; an X-ray generating part generating X-rays by collision with electrons emitted from the field emitting part; and, a collimator transmitting X-rays generated from the X-ray generating part in a specific direction, in which a plurality of through-holes are arranged on the collimator to transmit the X-rays in a specific direction, and the X-ray can be blocked in a region other than the through-hole.