An X-ray generation device includes an X-ray tube including an electron gun that generates an electron beam and a target that generates an X-ray by incidence of the electron beam; a power supply portion including a booster that boosts an input voltage from outside to generate a high voltage and an insulating block that seals the booster with an insulating material; and a control unit that performs control to generate the X-ray. The control unit includes a first information processing element that performs at least part of the control using a digital signal at a high potential based on the high voltage. The first information processing element is sealed with the insulating material in the insulating block.

The present approach relates to avoiding azimuthal blur in a computed tomography context, such as in dual energy imaging with fast kV switching. In accordance with certain aspects, the focal spot position is held stationary in the patient coordinate system within each respective view and the detector signals within the view are summed. In one embodiment, this results in the low and high energy views within the signal being collected from the same position within the patient coordinate system.

Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.

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).

Provided is an X-ray module assembly for a portable X-ray device, in which an X-ray tube is made of a carbon nano tube or a filament-type tube, preferably, a carbon nano tube, high-voltage capacitors and high-voltage diodes are arranged space-intensively, fine control of X-ray emission may be achieved by molding the above-configured X-ray module within a case having a reduced size and a reduced weight with thermosetting resin, preferably, epoxy-based resin, more preferably, soft epoxy-based resin, so that radiation exposure to a user may be minimized, power consumption may be greatly reduced, the X-ray module assembly may be downsized and lightened, an insulation effect is excellent, and the X-ray module assembly may be used semi-permanently. The X-ray module for a portable X-ray device includes an X-ray tube, a high-voltage transformer structure, a plurality of high-voltage capacitors, and a plurality of high-voltage diodes, and is fixedly supported by a tube guide.

Provided is an X-ray source including a vacuum closed tube. The X-ray source includes a high voltage connection module, a tube module, and a magnetic lens system into which the tube module is inserted. The tube module includes a vacuum closed tube. The vacuum closed tube includes a cathode electrode provided at one end thereof, a nano-emitter on the cathode electrode, an anode electrode provided at the other end, and a first insulation spacer provided between the cathode electrode and the anode electrode. In addition, the vacuum closed tube includes a first conductive tube and a second conductive tube both provided between the cathode electrode and the anode electrode and separated from each other by the first insulation spacer, and a first collimator block covering an inner surface of the first insulation spacer and having a first opening.

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, an X-ray detector, acquisition circuitry, a high voltage generator, and processing circuitry. The acquisition circuitry acquires electrical signals from a plurality of X-ray detection elements, and bundles the electrical signals in bundle units in accordance with a resolution mode of the X-ray detector. The processing circuitry determines a resolution mode, an application dose condition, and an X-ray exposure time for target CT imaging. The processing circuitry determines the focus size for the target CT imaging based on the determined resolution mode, application dose condition, and X-ray exposure time.

A laser-plasma-based acceleration system includes a focusing element and a laser pulse emission directing a laser beam to the focusing element to such that laser pulses transform into a focused beam and a chamber defining a nozzle having a throat and an exit orifice, emitting a critical density range gas jet from the exit orifice for laser wavelengths ranging from ultraviolet to the mid-infrared. the critical density range gas jet intersects the focused beam at an angle and in proximity to the exit orifice of the nozzle to define a point of intersection between the focused beam and the critical density range gas jet. In intersection with the critical density range gas jet, the pulsed focused beam drives a laser plasma wakefield relativistic electron beam. A corresponding method of laser-plasma-based acceleration is also described. The critical density range may include 210.sup.20 cm.sup.3 to 510.sup.21 cm.sup.3.

Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.

Embodiments of the disclosed system and method provide for generating a multiple-energy X-ray pulse. A beam of electrons is generated with an electron gun and modulated prior to injection into an accelerating structure to achieve at least a first and second specified beam current amplitude over the course of respective beam current temporal profiles. A radio frequency field is applied to the accelerating structure with a specified RF field amplitude and a specified RF temporal profile. The first and second specified beam current amplitudes are injected serially, each after a specified delay, in such a manner as to achieve at least two distinct energies of electrons accelerated within the accelerating structure during a course of a single RF-pulse. The beam of electrons is accelerated by the radio frequency field within the accelerating structure to produce accelerated electrons which impinge upon a target for generating Bremsstrahlung X-rays.