Abstract: According to one embodiment, an X-ray tube includes an outer envelope that maintains a vacuum inside, an anode target provided inside the envelope and generating X-rays by collision of thermal electrons, and a cathode electron gun provided inside the envelope and emitting thermal electrons toward the anode target, and the X-ray tube includes an envelope assembly including a metal-made cylindrical support fixing portion and constituting the envelope, and an anode assembly including a metal-made support holding the cathode electron gun, and the support of the cathode assembly is fixed to an inner circumferential side thereof by welding.

Abstract: According to one embodiment, a sliding bearing unit includes a stationary shaft, a rotating body, and a lubricant. A second distance is equal to or longer than a first distance. A second gap is formed between a first inner peripheral surface and a second outer peripheral surface. A first opening opens in a bottom surface of a capture concave surface. A second opening opens in the second outer peripheral surface. The second gap connects a through hole to a first gap.

Abstract: According to one embodiment, a cathode in which three electron guns are arranged in parallel with each other, each including a filament which emits electrons, a storage slot which stores the filament, and the three electron guns are constituted by a central electron gun which opposes the anode and electron guns, a central axis of the filament along a longitudinal direction at a center of the filament in a width direction thereof and a central axis of the storage slot along a longitudinal direction at a center of the storage slot in a width direction thereof, which coincide with each other, and a central axis of the focusing cup along a longitudinal direction at a center of the focusing cup in a width direction thereof that is displaced from the central axis of the filament.

Abstract: According to one embodiment, an X-ray tube includes a cathode, an anode, a cathode hood, a first X-ray transmission window, an envelope, and a first restraining member. A second side surface of the first restraining member has a contact surface that is pressed against an inner wall surface in a first hole of the cathode hood. The first X-ray transmission window is maintained in a state of being restrained to an overlap space of a first bottom surface in the first hole by the first restraining member.

Abstract: According to one embodiment, a coaxial cable includes a core wire, a plurality of sheaths which are tubular and made of metal and coaxially cover the core wire, a powdered insulating material which is filled between the core wire and an innermost sheath and between the plurality of sheaths, respectively, a first airtight portion which hermetically seals between the core wire and an inner sheath, and a second airtight portion which hermetically seals between the inner sheath and the sheath on an outer side of the inner sheath.

Abstract: According to one embodiment, an X-ray tube device includes a cathode which emits electrons, an anode target which generates X-rays when the electrons emitted from the cathode collide therewith, a first tube portion, a second tube portion which forms a flow path of a coolant together with the first tube portion, and a protective film. The protective film covers an inner surface of the first tube portion, and is formed of hard gold.

Abstract: According to one embodiment, an introduction-side rectangular waveguide tube and a lead-out-side rectangular waveguide tube are each connected to a circular connection plate connected to an end surface of the circular waveguide tube, and at least one connection plate includes, in an outer circumference thereof, the other welding collar welded to the one welding collar, and both the one welding collar and the other welding collar include grooves or holes for a rotation regulation jig to regulate rotation in a circumferential direction, and an entire portion along the circumferential direction including the grooves or holes is welded and fixed thereto.

Abstract: According to one embodiment, a klystron includes a plurality of cavity resonators arranged next to each other on a coaxial line. The cavity resonators each comprise a cylindrical body, one and another drift tubes provided on respective sides of respective ends of the cylindrical body, one and another support and a space adjustment means which adjusts the space between the one and the other drift tubes. The cylindrical body comprises a projection projecting from one end surface parallel to the axial line, and the one support is provided to abut on the projection, and the space adjustment means presses the one support toward the projection and adjusts the space between the one and the other drift tubes by plastically deforming the projection.

Abstract: According to one embodiment, an X-ray tube includes a vacuum enclosure that maintains a vacuum inside, a cathode provided in the vacuum enclosure, which emits an electron beam, an anode target provided in the vacuum enclosure, which emits an X-ray when the electron beam emitted from the cathode enters a focal plane of the anode target, and an X-ray radiation window that allows the X-ray emitted from the focal plane of the anode target to pass therethrough, and the X-ray radiation window comprises a window member and a support for the window member, the vacuum enclosure includes a joint portion formed thereon to be joined to the support and protrude toward an outer side of the vacuum enclosure, and the support comprises a covering portion that covers an inner circumferential surface of the joint portion.

Abstract: According to one embodiment, a klystron device includes a klystron body and a focusing magnetic field device. The klystron body has an electron gun section, a collector section, a plurality of cavity resonators, and a plurality of drift tubes. The cavity resonators have nose sections that face each other in an axial direction and form a gap section that is connected to the drift tubes. At least one of the cavity resonators has an electric field correction section in a part of the nose section that makes a space of the gap section different with respect to a space between the nose sections.

Abstract: According to one embodiment, an high-frequency input coupler installed between a waveguide and an acceleration cavity to input high-frequency waves from the waveguide to the acceleration cavity, a coaxial waveguide conversion unit includes a high-frequency transmission window structure connection unit that connects the high-frequency transmission window structure and an inner conductor connection unit that connects an inner conductor which includes an inner conductor support on a side of the inner conductor connection unit, and the high-frequency input coupler includes an electrically connectable and deformable buffer between the inner conductor support and the inner conductor connection unit.

Abstract: A neutron position detector according to an embodiment includes a tubular enclosure used as a cathode, an anode located at an axial center inside the enclosure, and a gas that includes a 3He gas and an additive gas and is sealed inside the enclosure. The additive gas includes nitrogen as a quenching gas, and argon as a gas that reduces the ranges of reaction products as neutron and 3He gas.

Abstract: According to one embodiment, a radiation detector includes a photoelectric conversion substrate having a detection area and a non-detection area, a scintillator layer, a frame-shaped sealant, a cover, and a moisture absorbing layer. A light transmittance of the moisture absorbing layer is changed by changing an amount of moisture in the moisture absorbing layer. The moisture absorbing layer covers the entire scintillator layer in planar view.

Abstract: According to one embodiment, an X-ray tube includes a vacuum enclosure in which an output window which transmits X-rays is formed, an anode target provided in the vacuum enclosure so as to oppose the output window, a cathode filament provided in the vacuum enclosure, that emits electrons to be irradiated onto the anode target, a power feed section to which a high voltage cable is connected, and an insulating portion that covers the power feed section and the high-voltage cable with an insulating material, and the power feed section includes a contact surface with which a distal end surface of the high-voltage cable is brought into contact, and an angle formed by the contact surface and the side surface of the high-voltage cable is an acute angle.

Abstract: According to one embodiment, the radiation detection panel includes a photo-electric conversion substrate including a plurality of photo-electric conversion sections, a scintillator layer provided on the photo-electric conversion substrate, and a moisture-proof cover. The moisture-proof cover sandwiches the scintillator layer together with the photo-electric conversion substrate and covers the scintillator layer. The moisture-proof cover is formed of glass.

Abstract: According to an embodiment, a radiation detector includes: a substrate; multiple control lines; multiple data lines; multiple detecting parts detecting radiation including thin film transistors; a control circuit switching between ON and OFF-states of the transistor; a signal detection circuit reading image data when the transistor is in the ON-state; and an incident radiation detecting part determining an incidence start time of the radiation based on a value of the image data read when the transistor is in the ON-state. When the incident radiation detecting part determines that radiation incidence has started, the signal detection circuit performs a first reading process of further reading image data when the transistor is in the ON-state. The control circuit performs an image storage process of setting all of the transistors to the OFF-state after the first reading process.

Abstract: A radiation detector includes control and data lines extending respectively in mutually-orthogonal first and second directions, photoelectric conversion parts respectively in regions defined by the control and data lines, noise detecting parts outside a region including the photoelectric conversion parts, a control circuit inputting control signals to first and second thin film transistors located respectively in the photoelectric conversion and noise detecting parts, a signal detection circuit reading image data and noise signals respectively from the photoelectric conversion and noise detecting parts, and an image configuration circuit configuring a radiation image based on the signals that are read.

Abstract: A radiation detector includes control lines extending in a first direction, data lines extending in a second direction orthogonal to the first direction, photoelectric conversion parts respectively in regions defined by the control and data lines, noise detecting parts arranged outside a region where the photoelectric conversion parts are located, and a scintillator located on the region where the photoelectric conversion parts are located. Each photoelectric conversion part includes a first thin film transistor electrically connected to corresponding control and data lines, and a photoelectric conversion element including an electrode electrically connected with the first thin film transistor. Each noise detecting part includes a second thin film transistor electrically connected to corresponding control and data lines, and a capacitance part electrically connected with the second thin film transistor.

Abstract: A radiation detector according to an embodiment includes an array substrate including multiple detecting parts detecting radiation directly or in collaboration with a scintillator, an analog circuit reading an image data signal from the multiple detecting parts, a digital circuit configuring a radiation image based on a signal from the analog circuit, and an inductor connected between a ground of the analog circuit and a ground of the digital circuit.

Abstract: A neutron position detector according to an embodiment includes a tubular enclosure used as a cathode, an anode located at an axial center inside the enclosure, and a gas that includes a 3He gas and an additive gas and is sealed inside the enclosure. The additive gas includes nitrogen as a quenching gas, and argon as a gas that reduces the ranges of reaction products as neutron and 3He gas.