Electric lamp and discharge devices – Photosensitive – Photomultiplier
Patent
1997-09-25
1999-03-23
Patel, Vip
Electric lamp and discharge devices
Photosensitive
Photomultiplier
313532, 313540, H01J 4318
Patent
active
058864652
ABSTRACT:
A photomultiplier tube of the present invention is the one which collects the electrons, which have been multiplied by the dynodes laminated into a plurality of stages in the electron multiplier section and that have subsequently been reflected at the final-stage dynode, as an output signal. The photomultiplier tube forms the final-stage dynode as multi-stage, for example, in two layers, and has its alkali metal vapor passage holes of its first layer so arranged as to have the holes shifted with respect to the alkali metal vapor passage holes of the second layer. Furthermore, each of the dynodes, except the final-stage dynode consists of the focusing mesh electrode, the coarse mesh electrode, and the spacer electrode and the reinforcing bars are formed at identical locations in the coarse mesh electrode and the spacer electrode. Secondary electron emission sections are provided in the vicinity regions of these reinforcing bars of the focusing mesh electrodes.
REFERENCES:
patent: 5572089 (1996-11-01), Kyushima et al.
patent: 5619100 (1997-04-01), Kyushima et al.
Muramatsu Shin-ichi
Takayama Fumihiro
Terada Toyohiko
Hamamatsu Photonics K.K.
Patel Vip
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