Abstract:
The invention relates to an electron accelerator comprising a vacuum chamber having an electron beam exit window, the vacuum chamber being formed within an elongate member; an electron generator positioned within the vacuum chamber for generating electrons; a high voltage connector positioned within the elongate member for supplying power to the electron accelerator; a high voltage insulator separating the vacuum chamber from the high voltage connector; and a housing surrounding the electron generator, the housing having at least one opening formed in the housing between the electron generator and the exit window for allowing electrons to accelerate from the electron generator out the exit window in an electron beam when a voltage potential is applied between the housing and the exit window; wherein the vacuum chamber is sealed.
Abstract:
An electron beam sterilizing device comprises; an electron-generating filament (110), a grid (114a-b) connected to a voltage source, a beam shaper (128), and an output window (118). A high voltage source generates a high voltage potential between the electron-generating filament and the output window, for acceleration of electrons. The usability of the device is enhanced in that the electron-generating filament and/or the grid electrode comprises at least two operational portions for variation of the current and form of an output electron beam.
Abstract:
The invention relates to an electron accelerator comprising a vacuum chamber having an electron beam exit window, the vacuum chamber being formed within an elongate member; an electron generator positioned within the vacuum chamber for generating electrons; a high voltage connector positioned within the elongate member for supplying power to the electron accelerator; a high voltage insulator separating the vacuum chamber from the high voltage connector; and a housing surrounding the electron generator, the housing having at least one opening formed in the housing between the electron generator and the exit window for allowing electrons to accelerate from the electron generator out the exit window in an electron beam when a voltage potential is applied between the housing and the exit window; wherein the vacuum chamber is sealed.
Abstract:
An electron beam gun (100) with an arched shaped beam former (104) as an integral part of a massive cathode block (103) which conducts heat away from the beam former and with a filament (109) mounted to the cathode block (103) for improved alignment.
Abstract:
A high power switching apparatus (100) comprises an annular cathode having a surface capable of emitting a hollow electron beam therefrom and an anode cavity spaced from said cathode. The cavity has an annular opening (151) smaller in dimension than a corresponding internal dimension that defines the cavity to provide a Faraday cage collector (150) of the hollow electron beam. A control electrode (38, 39), disposed between the cathode and the anode cavity in a non-intercepting position relative to the hollow electron beam, provides a controlling electric field region for modulation of the hollow electron beam. Arc suppressing electrodes (33, 34), at approximately the same potential as the cathode, are disposed between the control electrode and the anode. An intermediate high voltage electrode (184, 186), disposed between the arc suppressing electrodes and the anode cavity in a non-intercepting position relative to the hollow electron beam, provides a controlling electric field region for channeling of the hollow electron beam. The intermediate high voltage electrode maintains a positive voltage with respect to the cathode in order to provide an intermediate voltage step between the cathode and the anode in the off state and to channel the hollow electron beam towards the anode in the on state. A voltage, positive with respect to the cathode, is applied to the control electrode in order to draw the hollow electron beam from the emitting surface of the cathode and into the anode. The potential of the anode is generally positive with respect to the cathode, however, it needs not be at a potential as high as that of the control electrode, especially when electrons are being drawn from the cathode.
Abstract:
An electron gun (1) includes an emitter (2), a tubular support (3) and an adaptor (4) for receiving the emitter. The adaptor includes a tapered plugging surface (7) and the tubular support includes a correspondingly tapered seating surface (9) for receiving the plugging surface. The plugging surface and seating surface have conical profiles which help to position the adaptor concentrically with the support.
Abstract:
An electron beam gun contained in a high vacuum chamber comprising a plurality of high voltage surfaces comprising an emitter structure (26,27) connected through filament leads (21,22) to an external high voltage source; a metallic shield (31) surrounding the high voltage surfaces, wherein the shield has a hole through which a path of electrons from the emitter structure flow to a target in the vacuum chamber; grounding means for the shield; a crucible; means to focus and direct the path of electrons from the emitter structure to the crucible over an arc passing through the hole.
Abstract:
Die Erfindung betrifft einen steuerbaren thermionischen Elektronenemitter für Vakuumeletronenröhren mit einer emittierenden Emitterschicht (3,27) und mit einer von der Emitterschicht durch eine Isolierschicht (4) getrennten Steuerschicht (5), wobei die Isolierschicht und die Steuerschicht durch ein Abscheideverfahren hergestellt sind. Ein derartiger Elektronenemitter ist auch bei kleinen Abmessungen maßgenau herstellbar. Sämtliche funktionellen Elemente des steuerbaren thermionischen Elektronenemitters wie insbesondere Steuerschicht(en) (5,7,22,24), Emitterschicht (3,27) sowie trennende Isolierschichten (2,4,6,21,23,25) sind in Aufwachsrichtung aufeinanderfolgend und nacheinander auf ein Substrat (1,20) derart abgeschieden, daß die Schichten über Festkörpergrenzschichten aneinander haften. Die Maßhaltigkeit bleibt beim Betrieb und insbesondere bei Temperaturänderungen mit langer Lebensdauer schwankungsarm erhalten.