To provide an electron multiplier equipped with a dynode part excellent in vibration resisting performance.
This electron multiplier is characterized by that a Venetian blind dynode 5A and respective metal channel dynodes 5B of the dynode part 5 are fitted to a post 9 erected on a stem plate 3 constituting a vacuum vessel along with respective insulation spacers (insulation plates) 11; the blind dynode 5A, the respective channel dynodes 5B and the respective insulation spacers (insulation plates) 11 are integrally firmly supported on the post 9 in this state; and thereby causing no side slip to the Venetian blind, the respective metal channel dynodes 5B and the respective insulation spacers (insulation plates) 11 by vibration or shock, whereby the dynode part 5 exerts excellent vibration resisting performance.
SUZUKI SHINJI
Shiro Terasaki
Satoru Ishida