Abstract:
The present invention relates to an apparatus for generating an electron beam, comprising: a cathode; a housing which has an opening formed at one side thereof such that the cathode is coupled to the opening, and which has a resonant cavity formed therein; and a gasket interposed between the cathode and the housing such that the gasket is compressed in accordance with the coupling strength between the cathode and the housing so as to shut off the resonant cavity from the outside.
Abstract:
The invention relates to a cathode arrangement (20) comprising: a cathode body housing an emission surface (32) for emitting electrons in a longitudinal direction (Z), wherein the emission surface is bounded by an emission perimeter (35); a focusing electrode (40) at least partially enclosing the cathode body in a transversal direction and comprising an electron transmission aperture (44) for focusing the electrons emitted by the emission surface, wherein the aperture is bounded by an aperture perimeter (45), wherein the cathode body is moveably arranged within the focusing electrode over a maximum transversal distance (d1) from an aligned position (R0), and wherein the aperture perimeter transversally extends over the emission surface and beyond the emission perimeter over an overlap distance (d2) that exceeds the maximum transversal distance.
Abstract:
In one embodiment, the trajectory of one or more electrons is controlled in a field emission device. In another embodiment, the field emission device is configured analogously to a klystron. In another embodiment, the field emission device is configured with electrical circuitry selected to control the input and output of the device.
Abstract:
The present invention relates to an electron beam device having a body provided with an exit window, said body is forming or is at least partly forming a vacuum chamber, said vacuum chamber comprising therein a cathode housing (112) and at least one electron generating filament (120). At least one getter sheet (124) is provided between the cathode housing (112) and the filament (120). The invention is further comprising a getter sheet (124) for use in an electron beam device and a method of manufacturing an electron beam device comprising at least one getter sheet.
Abstract:
An annular ceramic washer has inner and outer cylindrical surfaces, first and second annular surfaces, and a winding path thick film resistor located on the inner surface. Metal washers are preferably brazed to the end ring surfaces. The annular ceramic washer is useful in vacuum tube applications in establishing a voltage on a target utilizing the voltage of an electrode coupled to the winding path thick film resistor.
Abstract:
A cold cathode electron source (2) comprises a central conductor (3) having an end face (9) and an electron emission layer (10) formed on the end face (9) and made of an electron emission material, and an external conductor (4) having a hollow portion (12) capable of inserting the central conductor (3) in a direction normal to the end face (9), and an aperture (14) opened to the hollow portion (12). The central conductor (3) is fitted in the external conductor (4) and abuts against the external conductor (4) in the fitted direction, whereby the central conductor (3) is positioned with respect to the external conductor (4) in the direction normal to the end face (9) and exposes the surface of the electron emission layer (10) from the aperture (14). Stable fabrications of electron sources of identical characteristics having an adjusted electron emission can be easily realized according to the cold cathode electron source.
Abstract:
PURPOSE: An electron beam generating apparatus and an x-ray generator including the same are provided to steadily arrange components by individually separating the components or coupling the components using a coupling part. CONSTITUTION: A first insulation layer(21), a gate, a second insulation layer, and a focusing gate are successively formed on a cathode electrode(20). The cathode electrode, the first insulation layer, the gate, the second insulation layer, and the focusing gate are separable. A coupling part couples and fixes the cathode electrode, the first insulation layer, the gate, the second insulation layer, and the focusing gate. A lateral supporting part(25) is fixed to the cathode electrode. An upper side supporting part(26) is connected to the lateral supporting part and is formed on the focusing gate.