Focusing electrode structure for photomultiplier tubes

Details Focusing electrode structure for photomultiplier tubes Focusing electrode structure for photomultiplier tubes

1988-03-18

1989-08-08

Yusko, Donald J.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

H01J 4306

Patent

active

048556424

ABSTRACT:
A focusing electrode structure for a photomultiplier tube which optimizes the tube operation. One or more focusing electrodes located between the photocathode and the first dynode are configured in the shape of substantial sections of a spheroid dome with the smaller opening nearer to the photocathode. In the preferred embodiment three focusing electrodes are used with their sizes increasing and their voltages decreasing as they approach the photocathode.

REFERENCES:
patent: 4306171 (1981-12-01), Faulkner et al.
patent: 4311939 (1982-01-01), Faulkner et al.

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