Produits et services

X-ray generators for use in medical diagnostic X-ray imaging applications

Abrégé

A grid component (20) for use with a vacuum electron device (VED), such as an inductive output tube (IOT), includes a skirt (2S) that adds structural support and aids in alignment. The grid component has a dome (22) in which a grid pattern is formed and includes an annular, concentric flange (24) surrounding the dome. The skirt is formed concentrically around the flange. Alignment orifices (30) may be provided in the flange for passage of alignment pins in the assembled product. The grid, flange, and skirt are a unitary component and are formed by a chemical vapor deposition (CVD) or similar process, in which a mandrel is used to provide a deposition surface. The mandrel is. placed in a furnace, and a high-temperature CVD process is used to break down a hydrocarbon gas to thereby deposit a pyrolytic graphite coating onto the mandrel. The mandrel may include a skirt template to provide the characteristic skirt.

Classes IPC  ?

• H01J 1/46 - Électrodes de commande, p. ex. grilleÉlectrodes auxiliaires
• H01J 9/14 - Fabrication des électrodes ou des systèmes d'électrodes des électrodes non émissives
• H01J 23/065 - Canons à électrons ou à ions produisant un faisceau cylindrique plein
• H01J 25/04 - Tubes à un ou plusieurs résonateurs, sans réflexion du faisceau électronique, et dont la modulation produite dans la zone modulatrice est principalement une modulation en densité, p. ex. tube de Haeff

Abrégé

A terahertz sheet beam klystron (TSBK) includes an electron gun configured to generate a sheet electron beam and a drift tube through which the sheet beam is propagated. The drift tube is provided with multiple resonant cavities and includes a drift tube circuit including an input RF circuit through which an input RF signal is introduced and an output RF circuit through which an output RF signal is extracted, a collector, and a vacuum envelope. The output RF circuit is configured such that Qe (extraction Q) of the drift tube circuit is comparable to Q0 (unloaded Q) of the drift tube circuit, thereby improving the efficiency of the drift tube circuit.

Classes IPC  ?

• H01J 25/10 - Klystrons, c.-à-d. tubes à au moins deux résonateurs, sans réflexion du faisceau électronique, et dont le faisceau est modulé principalement dans sa vitesse dans la zone du résonateur d'entrée

Abrégé

An electrode of an inductive output tube (IOT) is provided with channels for guiding cooling fluid. In one aspect of the invention, the channels are in a confronting relationship with a jacket surrounding the electrode and spaced from the electrode so as to define an interior region. Cooling fluid such as oil is circulated in the channels in fluid communication with the interior region, providing an escape mechanism for trapped bubbles in order to prevent localized heating of the electrode. In another aspect of the invention, the channels form multiple intersecting helical patterns of different pitches, with the steeper-pitched channels providing a more direct escape route for the bubbles.

Classes IPC  ?

• H01J 7/26 - Dispositifs de réfrigérationDispositifs de chauffageMoyens de circulation de gaz ou vapeurs à l'intérieur de l'espace de décharge à flux de liquide à travers des passages associés au tube ou à la lampe

Produits et services

X-ray generator

Produits et services

computer programs for use in operating medical equipment generators

Produits et services

X-ray generators for use in medical diagnostic X-ray imaging applications