Abstract:
A vacuum container is configured so that an opening on one side and an opening on another side in the longitudinal direction of a cylindrical insulating body are sealed with an emitter unit and a target unit respectively; and a vacuum chamber is provided on the inner peripheral side of the insulating body. The emitter unit is provided with: a moving body located on the one side in the longitudinal direction in the vacuum chamber and supported so as to be movable in the longitudinal direction via a bellows; and a guard electrode located on the outer peripheral side of the moving body. An emitter section having an electron generating section is formed at a tip section of the moving body on the other side in the longitudinal direction by subjecting the surface of the tip section to film formation processing.
Abstract:
According to one embodiment, an X-ray tube includes an anode target, a cathode including a filament and a convergence electrode which includes a groove portion, and an envelope. The groove portion includes a pair of first bottom surfaces which are located in the same plane as the filament and between which the filament is interposed in a width direction of the groove portion, and a pair of second bottom surfaces between which the filament and the pair of first bottom surfaces are interposed in a length direction of the groove portion and which are located closer to an opening of the groove portion than the pair of first bottom surfaces.
Abstract:
An X-ray generator is provided using a transmission type target having a long life span, where it is possible to change the point for generating X-rays on the surface of the target while maintaining the vacuum chamber in a high vacuum state. A portion of a vacuum chamber 1 that includes a target 2 is linked to a main body portion 1a of the chamber through a linking member 5 as a movable chamber portion 1b. A fixed anode 12 is provided between the target 2 and the electrode 10 at the final stage from among a group of electrodes 8, 9 and 10 for electrostatically accelerating and converging electrons from an electron source 7 and is fixed to the main body portion 1a of the chamber in order to prevent the form of the electrical field from changing when the movable chamber portion 1b is shifted.
Abstract:
A photocathode enhancement system includes a cathode plate that is movably positioned relative to an incident optical beam. The emission surface of the cathode plate has an area between about 0.5 cm2 to greater than 100 cm2. The system includes a motion controller that is configured to control the movement of the cathode plate relative to the optical beam, so that the optical beam successively strikes non-overlapping portions of the emission surface, and may reach substantially the entire emission surface over a time period of about 10 seconds to about 100 seconds. The movement of the cathode plate is controlled so that on average, the heat from the optical beam is uniformly distributed over the emission surface of the cathode plate.
Abstract:
A cathode-housing suspension of an electron beam device having a tubular body of elongate shape with an exit window extending in the longitudinal direction and a connector end in one end of the tubular body is disclosed. The electron beam device further comprises a cathode housing having an elongate shape and comprising a free end and an attachment end remote to the free end, and the attachment end comprises an outwardly extending flange provided with threaded openings for set screws and non-threaded openings for attachment bolts, for attaching the attachment end to a corresponding socket of the tubular body, wherein a mechanism configured to bias the attachment end away from the socket are arranged in the tubular body.
Abstract:
A device has a pair of facing electrodes or electrode assemblies wherein an attracting force distribution within the electrodes or electrode assemblies and an equal but opposite repelling force distributions act simultaneously to establish a stable equilibrium separation of the two electrodes across all or part of their facing surfaces. At least one of the electrode faces has a curved shape. The curved shape is selected to achieve a small contact area at a center point and a larger area surrounding the center point for electron tunneling or photon tunneling or phonon blocking or any combination of these.
Abstract:
An improved design for maintaining separation between electrodes in tunneling, resonant tunneling, diode, thermionic, thermo-photovoltaic and other devices is disclosed. At least one electrode 1 is made from flexible material. A magnetic field B is present to combine with the current flowing in the flexible electrode 1 and generate a force or a thermal expansion force combined with a temperature distribution that counterbalances the electrostatic force or other attracting forces between the electrodes. The balancing of forces allows the separation and parallelism between the electrodes to be maintained at a very small spacing without requiring the use of multiple control systems, actuators, or other manipulating means, or spacers. The shape of one or both electrodes 1 is designed to maintain a constant separation over the entire overlapping area of the electrodes, or to minimize a central contact area. The end result is an electronic device that maintains two closely spaced parallel electrodes in stable equilibrium with a uniform gap therebetween over a large area in a simple configuration for simplified manufacturability and use to convert heat to electricity or electricity to cooling.
Abstract:
In an electron emission device, the surface roughness of a substrate with driving electrodes and an insulating layer is optimized. The electron emission device includes first and second substrates facing each other with a predetermined distance therebetween. An electron emission unit is formed on a surface of the first substrate facing the second substrate, and includes electron emission regions, a plurality of driving electrodes, and an insulating layer for insulating the driving electrodes from each other. A light emission unit is formed on a surface of the second substrate facing the first substrate, and includes phosphor layers and an anode electrode. The first substrate satisfies the following condition: 0.5 nm≦Ra≦1.8 nm, where Ra indicates the average roughness of the surface of the first substrate facing the second substrate.
Abstract translation:在电子发射器件中,优化了具有驱动电极和绝缘层的衬底的表面粗糙度。 电子发射装置包括彼此面对彼此以预定距离的第一和第二基板。 电子发射单元形成在面向第二衬底的第一衬底的表面上,并且包括电子发射区域,多个驱动电极和用于使驱动电极彼此绝缘的绝缘层。 在与第一基板相对的第二基板的表面上形成发光单元,并且包括荧光体层和阳极电极。 第一衬底满足以下条件:0.5nm <= Ra <= 1.8nm,其中Ra表示面向第二衬底的第一衬底的表面的平均粗糙度。
Abstract:
A method for forming patterned insulating elements on a substrate includes a plurality of exposure steps of exposing a photosensitive paste provided on the substrate through at least one mask having a predetermined pattern; a developing step of developing the exposed photosensitive paste to form a precursor pattern; and a firing step of firing the precursor pattern to form the patterned insulating elements. This method is applied to a method for forming an electron source and a method for forming an image display device including the electron source.
Abstract:
A method for forming patterned insulating elements on a substrate includes a plurality of exposure steps of exposing a photosensitive paste provided on the substrate through at least one mask having a predetermined pattern; a developing step of developing the exposed photosensitive paste to form a precursor pattern; and a firing step of firing the precursor pattern to form the patterned insulating elements. This method is applied to a method for forming an electron source and a method for forming an image display device including the electron source.