Photomultiplier tube with multi-layer anode and final stage dyno

Details Photomultiplier tube with multi-layer anode and final stage dyno Photomultiplier tube with multi-layer anode and final stage dyno

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.

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