Photoelectric x-ray tube with gain

H - Electricity – 01 – J

Patent

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H01J 35/00 (2006.01) H01J 35/06 (2006.01)

Patent

CA 2232379

An X-ray tube has an anode and a photocathode inside a vacuum envelope and an electron multiplier is disposed between them. Such an electron multiplier may be a plurality of sequentially disposed dynodes or a microchannel plate. Because of the secondary electron emission from the electron multiplier, a higher-power radiation is obtained without requiring a high optical power level to generate photoelectrons. The vacuum envelope may be of a rotary type with the anode and photocathode having annular regions.

Ce tube à rayons X comprend une anode et une photocathode dans une enveloppe à vide et un multiplicateur d'électrons disposé entre les deux. Ce multiplicateur d'électrons peut être une pluralité de dynodes disposées en séquence ou une plaque à microcanaux. Dans la mesure où il se produit une émission d'électrons secondaire à partir du multiplicateur d'électrons, un rayonnement de haute puissance est obtenu sans qu'un niveau de puissance optique élevé soit requis pour générer les photoélectrons. L'enveloppe sous vide peut être du type rotatif, l'anode et la photocathode comprenant des régions annulaires.

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