An X-ray generator includes an X-ray tube, an X-ray tube accommodation portion, and a power source unit having an internal substrate supplying a voltage to the X-ray tube sealed inside an insulating block. A first space is defined by an upper surface of the insulating block and an inner surface of the X-ray tube accommodation portion. A second space is defined by a recess portion opening to the outside formed on a side surface of the insulating block and a sealing member sealing an opening of the recess portion. A communication hole causing the first space and the second space to communicate with each other is provided in the insulating block. Insulating oil is enclosed in the first space and the second space. A depth of the recess portion is smaller than a width of the recess portion.

An X-ray generator includes an X-ray tube configured to generate X-rays, an X-ray tube accommodation portion which accommodates at least a part of the X-ray tube and enclosing insulating oil, a second accommodation portion surrounding the X-ray tube accommodation portion when viewed in a tube axis direction of the X-ray tube, a blower fan configured to circulate gas inside a surrounding space defined between the X-ray tube accommodation portion and the second accommodation portion, and an X-ray shielding portion made of a material having a higher X-ray shielding ability than the X-ray tube accommodation portion and the second accommodation portion, and provided on an inner surface of the second accommodation portion.

The electron beam is typically dynamically steered after its generation on the path to the target. The steering is performed by one or more source coils. These coils produce the magnetic field outside the vacuum vessel allowing air/water/oil cooling to remove undesired heat. The magnetic field is then picked up inside the vacuum vessel with pole pieces and guided towards the region where the magnetic field is needed to steer the electron beam.

The present application provides a combined machine head and a ray imaging device, wherein the combined machine head comprises: a housing, having an enclosed cavity; a ray tube, arranged in the enclosed cavity; and a pump and a pipe, arranged in the enclosed cavity; wherein the pump is arranged on one side away from an anode of the ray tube, the pipe has one end connected with an outlet of the pump and another end extending to be near the anode of the ray tube; or the pump is arranged near the anode of the ray tube, the pipe has one end connected to an inlet of the pump and another end extending to one side away from the anode of the ray tube. In the present application, when the pump works, insulation medium at positions away from the anode is drawn to the vicinity of the anode, and the insulation medium in the enclosed cavity is driven to cycle, so as to gradually reduce the temperature difference between the position of the anode and other positions, allowing the temperature gradient of the insulation medium in the enclosed cavity to be distributed more uniformly.

An X-ray generator includes an X-ray tube, a blower fan having a motor and configured to provide the X-ray tube with air, a motor control unit configured to control a rotation speed of the motor, and a casing to which the X-ray tube and the blower fan are attached. The motor control unit shifts the rotation speed of the motor from a resonance frequency of a structure including the X-ray tube and the casing. According to this configuration, a resonance phenomenon caused by vibration generated by the motor is avoided. Therefore, influences of vibration on the X-ray tube are reduced. As a result, the X-ray generator can be operated in a highly stable manner.

An embodiment of the invention relates to a cooling system for an imaging apparatus having a gantry for cooling components arranged in the gantry, including a fan and a solid body. The solid body has an inlet opening, and an outlet opening, wherein the inlet opening is larger than the outlet opening. The solid body also has a positive guide, defined by a continuous outer boundary, for a first fluid from the inlet opening to the outlet opening, which continuously transforms the geometry of the inlet opening into the geometry of the outlet opening and defines a flow path for the first fluid, and has a flow channel for a second fluid, which is arranged in heat exchange communication with the flow path, and has an inlet and an outlet for the second fluid.

An X-ray inspection apparatus includes: an X-ray emitter configured to emit an X-ray; an X-ray detector configured to detect the X-ray; a first flow passage configured to guide air to at least part of the X-ray detector; and a second flow passage configured to guide air to at least part of the X-ray detector.

A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

An X-ray tube includes an electron gun, a target that generates X-rays, and a vacuum housing that accommodates the electron gun and the target. The vacuum housing has a metal portion having an X-ray emission window, and an insulation valve connected to the metal portion. The metal portion has a cylinder portion in which the X-ray emission window is provided and which surrounds a tube axis of the vacuum housing, and a tapered portion which is connected to an end portion of the cylinder portion, surrounds the tube axis, and protrudes such that a connection part between the metal portion and an insulation valve is covered. The tapered portion has a shape increased in diameter such that a separation distance between a distal end portion and the tube axis is longer than a separation distance between a base end portion and the tube axis.

An X-ray CT apparatus according to an embodiment includes: a rotatable gantry base; a housing that is fixed to the gantry base and that has an opening; an insert that is removably located in the housing and that includes a cathode that generates a thermal electron and an anode that receives collision of the thermal electron to generate an X-ray; and a blower that is removably attached to the side of the opening to flow air into the housing.