Air-cooled end-window metal-ceramic x-ray tube for lower...

H - Electricity – 01 – J

Patent

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H01J 35/14 (2006.01) H01J 35/06 (2006.01) H01J 35/16 (2006.01)

Patent

CA 2268137

An X-ray tube device (30) and a method for construction thereof which provides the cathode assembly (36) and the anode assembly (38) in a nose of the X-ray tube, wherein an emitter face of each assembly is directed toward an X-ray emission end thereof. The electrons emitted from the cathode assembly travel along a path outward until striking the anode assembly which then generates the X-rays which are directed toward a beryllium window (32) in the X-ray tube. This advantageous structure enables the anode-to-window distance to be small, resulting in a large X-ray flux towards a sample. Furthermore, the small nose of the X-ray tube enables a fluorescence detector to be positioned in an optimal location because the X-ray tube's shape does not displace the fluorescence detector.

L'invention concerne un tube à rayons X (30), ainsi que son procédé de construction. Selon ce procédé, un ensemble cathode (36) et un ensemble anode (38) sont placés à l'avant du tube à rayons X, le coté émetteur de chacun de ces ensembles étant orienté vers l'extrémité émettrice de rayons X de ces ensembles. Les électrons émis depuis ledit ensemble cathode se déplacent le long d'une trajectoire extérieure, jusqu'à frapper ledit ensemble anode, qui produit ensuite les rayons X dirigés vers la fenêtre de béryllium (32) dudit tube à rayons X. Cette structure améliorée permet de réduire la distance séparant l'anode de la fenêtre, et ainsi d'augmenter le flux de rayons X vers un échantillon. La taille réduite de l'avant du tube à rayons X permet en outre à un détecteur de rayonnement fluorescent d'être placé dans une position optimale, la forme dudit tube à rayons X permettant par ailleurs à ce détecteur de rayonnement fluorescent de rester en place.

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