Abstract:
The disclosed subject matter includes devices and methods relating to anode assemblies and/or X-ray assemblies. In some aspects, a method of forming an X-ray assembly may include providing an anode base 74 formed of a first material and including a first end. The method may include depositing a second material different from the first material over a first surface of the anode base to form a coated portion 180 of the anode base. The coated portion may be configured such that some backscattered electrons do not travel beyond the coated portion.
Abstract:
A distance (L1) from an X-ray tube central axis (0) to an outer side surface of a cathode electron gun (16) in a direction perpendicular to the longitudinal direction of a filament coil (15) is made less than a distance (P1) from the X-ray tube central axis (O) to an outer side surface of the cathode electron gun (16) in the longitudinal direction of the filament coil (15), and a distance (L2) from the X-ray tube central axis (0) to an X-ray radiation window (20a) in the direction perpendicular to the longitudinal direction of the filament coil (15) is made less than a distance (P2) from the X-ray tube central axis (O) to an X-ray radiation window (20b) in the longitudinal direction of the filament coil (15). This configuration makes it possible to position an optical element for collecting X-rays near the focal point of an X-ray tube when using X-rays on a line-focus side, thereby increasing the X-ray collection efficiency.
Abstract:
Systems, methods, and devices with improved electrode configuration for downhole nuclear radiation generators are provided. For example, one embodiment of a nuclear radiation generator capable of downhole operation may include a charged particle source, a target material, and an acceleration column between the charged particle source and the target material. The acceleration column may include an intermediate electrode that remains floating at a variable potential, being electrically isolated from the rest of the acceleration column.
Abstract:
Provided is an x-ray tube capable of easily and stably performing a focus dimension variable control and a tube current control. The x-ray tube is equipped with a cathode (10) having a filament (11) and a trench portion (16) in which the filament (11) is housed. In the x-ray tube, the trench portion (16) has: a pair of first bottom surfaces (S1) having the same plane as a plane on which the filament (11) is positioned and sandvviching the filament (11) in the width direction (db) of the trench potion (16); and second bottom surfaces (S2) sandwiching the filament (11) and the pair of first bottom surfaces (S1) in the length direction (da) of the trench portion (16) and positioned on the more opening (16a) side of the trench portion (16) than the pair of first bottom surfaces (S1).
Abstract:
An electron beam emitting a cathode module of an X-ray tube based on carbon nanotube is provided to focus both electrodes by an electron beam focusing lens and to easily manufacture a module having a cathode of three pole structures and a grid electrode. In an electron beam emitting a cathode module of an X-ray tube based on carbon nanotube, a cathode(5) is based on a carbon nanotube as an electron emission source. A gate unit induces an emission of electrons from the cathode(5). An anode accelerates the electrons emitted from the cathode and generates an X-ray by collision of the electrons. The carbon nanotube is deposited on a substrate(6). A substrate supporting table(7) supports the substrate(6). A grid electrode unit(3) is made of a metal material capable of applying a high voltage. A second insulating layer(10) encompasses a side surface of the grid electrode unit(3) and a bottom portion of the substrate supporting table(7) in a cylindrical shape. A third insulating layer is installed in a shape of a doughnut. An electron beam collecting unit(1) encompassed by the second insulating layer(10) and the third insulating layer in a cylindrical shape is constructed by being modulized as one body.