DYNODE PRODUCING METHOD AND STRUCTURE

摘要

The inner side surface of an electron multiplier hole (14) includes a first curved surface (19a) and a second curved surface (19b) opposed thereto. The first curved surface (19a) extends from the edge of an input opening (14a) so that it is opposed to the input opening (14a), and is formed in a substantially arcuate shape having a predetermined radius. The second curved surface (19b) extends from the edge of an output opening (14b) so that it is opposed to the output opening (14b), and is formed in a substantially arcuate shape having a predetermined radius.