Patent ID: 9147559
Filing Date: 2015-09-29
Classification: H01J

Abstract:
1. A photomultiplier, comprising: an enclosure having an internal space kept in a vacuum state, the enclosure comprising an upper frame, a lower frame opposing the upper frame, and a side wall frame provided between the upper frame and the lower frame; a photocathode, accommodated in the enclosure, emitting photoelectrons to the inner space of the enclosure in response to light incident on the photocathode; an electron multiplying section accommodated in the enclosure while being fixed on one of the upper frame and the lower frame, the electron multiplying section cascade-multiplying the photoelectrons along a cascade-amplification direction extending from one end to the other end of the electron multiplying section; an anode accommodated in the enclosure while being arranged at the other end side of the electron multiplying section; and a transmitting window through which light to be incident on the photocathode passes, the transmitting window being arranged in a region of the side wall frame where faces the one end of the electron multiplying section.