During operation of a reflection target x-ray source, heat must be removed from many components. The electron beam must be steered to the target and may interact with structures along this path. There is also heat generated in the target itself. This can be excessive, since only a very small percentage of the electron beam's energy is transformed into x-rays. Finally, the x-rays must exit the vacuum through the window, which can also be heated both by the x-rays, reflected electrons, and radiant heat from the target. A water cooled reflective x-ray source provides for water or other fluid cooling of the centering aperture, x-ray target, and/or exit window.

An X-ray source includes an X-ray tube; a radiation shielding shell enclosing the X-ray tube, the radiation shielding shell including a collimator formed integrally with it, wherein the radiation shielding shell comprises finely dispersed powder, polyester or epoxy resin and hardener; a cooler system providing oil to the X-ray tube; and an oil filled tank supplying the oil to the cooler system. There is a central shielding element shaped as a cylinder inside the radiation shielding shell and one or more end shielding elements around the X-ray tube. The central and end shielding elements are made of lead.

An x-ray generating unit includes an x-ray tube that is substantially transparent to x-rays and that defines a vacuum therein. A cathode is disposed within the x-ray tube and defines a plurality of spaced apart cavities. An anode is spaced apart from the cathode and includes a material that emits x-rays when impacted by electrons. A plurality of filaments is each disposed in a different one of the cavities defined by the cathode and each is electrically coupled to the cathode. Each filament emits a focused electron beam directed to a different predetermined spot on the anode upon application of a predetermined voltage between the cathode and the anode, thereby causing the anode to generate x-rays.

An x-ray source can include an x-ray tube, and a heat sink for removal of heat from the x-ray tube. The heat sink can be thermally coupled to the anode and can extend away from the anode along a heat sink longitudinal axis. The heat sink can have a base and a fin extending from the base. The base can have a greater thickness nearer the anode, and a reduced thickness along the heat sink longitudinal axis to a smaller thickness farther from the anode.

An x-ray generating unit includes an x-ray tube that is substantially transparent to x-rays and that defines a vacuum therein. A cathode is disposed within the x-ray tube and defines a plurality of spaced apart cavities. An anode is spaced apart from the cathode and includes a material that emits x-rays when impacted by electrons. A plurality of filaments is each disposed in a different one of the cavities defined by the cathode and each is electrically coupled to the cathode. Each filament emits a focused electron beam directed to a different predetermined spot on the anode upon application of a predetermined voltage between the cathode and the anode, thereby causing the anode to generate x-rays.

The invention discloses X-ray machine ray tube heat dissipation device which comprises a heat dissipation pool and an X-ray machine ray tube arranged in the heat dissipation pool, wherein the heat dissipation pool is provided with a water inlet and a water outlet, and the water outlet of the heat dissipation pool is communicated with the water inlet of water tank.

An x-ray emitter includes an x-ray tube and an x-ray emitter housing. In an embodiment, the x-ray tube includes an evacuated x-ray tube housing, a cathode for emitting electrons and an anode for generating x-rays as a function of the electrons. Further, in an embodiment, the x-ray emitter housing includes the x-ray tube and outside of the x-ray tube, a gaseous cooling medium. In an embodiment, the x-ray emitter further includes a compressor for a forced convection of the gaseous cooling medium for cooling the x-ray tube, a pressure ratio between the intake side and pressure side of the compressor being greater than 1.3.

The present invention relates to a portable X-ray tube, and more particularly, to a portable X-ray tube capable of miniaturization and weight reduction by reducing the structural volume of the X-ray tube by installing cathodes in the same direction together with the fixed anode. The portable X-ray tube comprises: an anode portion comprising an anode heat sink for conducting and dissipating heat transferred through the anode, an anode formed on the upper part of the anode heat sink, and an anode target formed on the inclined surface of the upper end of the anode; a cathode portion installed in parallel with the anode through the installation hole of the cathode portion formed in the anode heat sink; and a vacuum bulb fixed to the heat sink to seal the anode portion and the cathode portion with a vacuum; wherein the X-rays emitted through the anode target are irradiated to the upward direction as the installation direction of the anode.

An x-ray source can include an x-ray tube, and a heat sink for removal of heat from the x-ray tube. The heat sink can be thermally coupled to the anode and can extend away from the anode along a heat sink longitudinal axis. The heat sink can have a base and a fin extending from the base. The base can have a greater thickness nearer the anode, and a reduced thickness along the heat sink longitudinal axis to a smaller thickness farther from the anode.

An x-ray tube anode can include an electron hole extending from an electron entry at an exterior of the anode into a core of the anode, and an x-ray hole extending from an x-ray exit at the exterior of the anode into the core of the anode. The x-ray hole can intersect the electron hole at the core of the anode. In one embodiment, the electron hole and the x-ray hole can form a seamless bore from the electron entry to the x-ray exit. In another embodiment, the anode can be a single, integral, monolithic material with a single bore extending therethrough. In another embodiment, the core of the anode can include a target material located at a concave wall of the core of the anode.