Electron tube

Details Electron tube Electron tube

1997-03-10

1998-04-28

O'Shea, Sandra L.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313532, 313103R, 313105CM, H01J 4300

Patent

active

057449082

ABSTRACT:
An electron tube includes an electron multiplication unit for multiplying an incident electron flow by secondary electron emission. This electron multiplication unit is formed by stacking a plurality of dynodes toward an incident side of the electron flow. A plurality of through holes are arranged and formed in each dynode, in which one end on the incident side of the electron flow is used as an input opening, and the other end is used as an output opening. An acceleration electrode unit projecting toward the through hole of the upper dynode is provided at an edge portion of the input opening. As described above, the acceleration electrode unit is provided at the edge portion of the input opening of the through hole formed in each dynode. For this reason, a damping electric field is pushed up by the acceleration electrode unit and deeply warped into the through hole of the upper dynode. With the action of the damping electric field, the secondary electrons are properly guided to the next dynode, thereby improving the electron collection efficiency.

REFERENCES:
patent: 3939374 (1976-02-01), Schagen et al.
patent: 4649314 (1987-03-01), Eschard
patent: 4825118 (1989-04-01), Kyushima
patent: 5510674 (1996-04-01), Kyushima et al.

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