Improved heat transfer from an x-ray tube can be accomplished with a heatsink surrounding at least part of an x-ray tube. The heatsink can be electrically connected to an anode of the x-ray tube and can be an electrical current path. The heatsink can include a plurality of protrusions extending radially outward from the x-ray tube and can be a single, integral substance extending from an inner-surface of the heatsink to a distal-end of the protrusions.

The present disclosure provides a device and an equipment for radiation ray generation. The device may include: a radiation target assembly configured to generate radiation rays under irradiation of an electron beam with a predetermined energy; and a heat dissipation assembly arranged on a back surface of the radiation target assembly, wherein a range of a thickness of the target assembly may be determined based on a peak of energy deposition of a target material of the radiation target assembly under the irradiation of the electron beam with the predetermined energy.

An X-ray tube includes a tube body that encloses a tube volume in a gas-tight manner. An emitter electrode, a gate electrode, and an anode are arranged within the tube volume. The emitter electrode is an unheated electrode having emitter needles in an area facing the gate electrode, which are themselves arranged on a substrate. The arrangement of the emitter electrode and the gate electrode are coordinated such that applying an emission voltage between the emitter electrode and the gate electrode causes electrons to be emitted from the multitude of emitter needles due to the resulting electrical field. The gate electrode is connected with thermal conductivity via a connecting element to a heat sink arranged outside the tube volume.

X-ray tube assemblies having a two-piece anode structure and shaped cathode structures for delivery of X-ray emissions.