A thermal control and electrical connection means for an electronic radiation source that provides a cooling and electrical connection to an electronic radiation source in high-temperature environment is provided, including at least a means for physically dislocating a positive high-voltage generator from the anode/target of the x-ray source; a means for conveying coolant fluids to a target anode along a coaxially formed connector; and a means for removing heat from the target anode along a coaxially-formed connector. A method of removing thermal energy from the target of an electronic radiation source is also provided, including at least introducing coolant fluids onto the target; removing coolant fluids from the target; and relocating the coolant fluids to another part of the tool for disposal within the wellbore.

In one embodiment, an x-ray tube 15 can be used closer to a sample. An angle A.sub.1 between an anode axis 02 and an electron-beam axis 01 can be 10 and 80 and an angle A.sub.2 between the anode axis 02 and an x-ray axis 03 can be 10 and 80. In another embodiment, a cap 20 on an anode 12 can block x-rays emitted in undesired directions. The cap 20 can include an internal cavity 24, an electron-beam hole 21, an anode hole 22, and an x-ray hole 23. In another embodiment, an electrical connection between an x-ray tube 15 and a power supply 18 can be reliable and easy to manufacture. The anode 12 can include a hole 31 at an end of the anode 12 sized and shaped for insertion of an electrical connector 32.

Various methods and systems are provided for an X-ray tube cathode focusing element. In one example, a focusing element is configured with three electron emission filaments, an integrated edge focusing, and a bias voltage. The integrated edge focusing may include a continuous single architecture with rounded edges, and a voltage of the focusing element may be negatively biased relative to a voltage of the electron emission filaments.

A charged particle device includes an electron emitting part for emitting electrons, an electron irradiated part configured to be irradiated with the electrons emitted from the electron emitting part, a container part configured to evacuate an interior thereof and contain the electron irradiated part in the interior thereof, an electric wire containing part configured to be inserted from an outside of the container part via an insertion part provided in the container part to contain an electric wire through which electricity is conducted to the electron irradiated part contained in the container part, and an insertion-part-side protrusion part configured to surround the electric wire containing part and protrude from a vicinity of the insertion part on an inner wall of the container part to an interior of the container part.

A target assembly for an x-ray emission apparatus is disclosed. The apparatus may comprise a vacuum chamber. The vacuum chamber may have at least one conductive wall. The apparatus may comprise an insulating element. The insulating element may project through the conductive wall. The apparatus may comprise a high voltage element. The high voltage element may extend along the insulating element. The high voltage element may extend from outside the chamber. The high voltage element may extend to an end portion of the insulating element furthest from the conductive wall. The apparatus may comprise an x-ray-generating target. The x-ray-generating target may be arranged at the end portion of the insulating element. The x-ray generating target may be electrically connected to the high voltage element. The apparatus may comprise a suppressive electrode. This suppressive electrode may be arranged at the end portion of the insulating element. This suppressive electrode may be configured to suppress acceleration towards the outer surface of the insulating element of electrons which are emitted from a junction between the outer surface of the insulating element and an inner surface of the conductive wall. An x-ray emission apparatus is also disclosed. The x-ray emission apparatus may comprise the target assembly. The apparatus may comprise an electron beam apparatus. The electron beam apparatus may be arranged to accelerate a beam of electrons towards an x-ray-generating target. The x-ray emission apparatus may thereby generate x-ray radiation.

A receptacle for receiving a plug connector of a high-voltage cable for a microfocus X-ray tube with a cathode, which has a metal filament and grid. The receptacle has a ceramic insulator with three contiguous cavities. The first cavity near the filament includes electrical contacts for the filament and the grid. The second cavity includes spring contacts for supplying current to the filament and a center pin for supplying voltage to the grid. The third cavity receives the plug connector. The insulator has a removable grid cap which is conductively connected to the grid of the cathode. The first and second cavities are surrounded in the radial direction by the grid cap, An air gap extends radially between grid cap and ceramic body. At the end of the grid cap remote from the filament is a circumferential groove in the axial direction between the grid cap and the ceramic insulator.

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.

Various methods and systems are provided for an X-ray tube cathode focusing element. In one example, a focusing element is configured with a first side positioned adjacent to an electrode plate. An insulator having a first side is positioned adjacent the electrode plate and a second, opposite side adjacent to a cathode base. The focusing element has at least three filaments of different sizes positioned in respective channels of different widths, where each of the at least three filaments are coupled to two current feedthroughs, each current feedthrough configured with a leg extending through a central, hollow space of the focusing element, the electrode plate, the insulator, and the cathode base.

Various methods and systems are provided for an X-ray tube cathode focusing element. In one example, a focusing element is configured with a first side positioned adjacent to an electrode plate. An insulator having a first side is positioned adjacent the electrode plate and a second, opposite side adjacent to a cathode base. The focusing element has at least three filaments of different sizes positioned in respective channels of different widths, where each of the at least three filaments are coupled to two current feedthroughs, each current feedthrough configured with a leg extending through a central, hollow space of the focusing element, the electrode plate, the insulator, and the cathode base.

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.