(under subclass 533) Subject matter including, (1) a plurality of passageways to direct the photoelectrons emitted by the photocathode and each passageway has a surface which emits secondary electrons as a result of the photoemitted electrons hitting the secondary electron emissive surface in its travel through the passageway, or (2) plural dynodes placed serially in a circular manner.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103, for a lamp or discharge device having a channel multiplier.
105, for a lamp or discharge device with three or more channel multipliers.
