H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 29/04 (2006.01) G03F 7/20 (2006.01) H01J 1/34 (2006.01) H01J 37/073 (2006.01)
Patent
CA 2289131
A photocathode having a gate electrode so that modulation of the resulting electron beam is accomplished independently of the laser beam. The photocathode includes a transparent substrate, a photoemitter, and an electrically separate gate electrode surrounding an emission region of the photoemitter. The electron beam emission from the emission region is modulated by voltages supplied to the gate electrode. In addition, the gate electrode may have multiple segments that are capable of shaping the electron beam in response to voltages supplied individually to each of the multiple segments.
L'invention concerne une photocathode munie d'une électrode de commande qui lui permet de moduler le faisceau d'électrons émis, et ce indépendamment du faisceau laser. La photocathode comprend un substrat transparent, un photoémetteur et une électrode de commande électriquement séparée qui entoure une région d'émission du photoémetteur. On module l'émission du faisceau d'électrodes depuis la région d'émission en appliquant des tensions à l'électrode de commande. En outre, l'électrode de commande peut comporter plusieurs segments capables de façonner le faisceau d'électrons en réponse aux tensions appliquées individuellement à chacun des segments multiples.
Berglund C. Neil
Chang Tai-Hon Philip
Lee Kim Y.
Mankos Marian
Etec Systems Inc.
Smart & Biggar
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