Photomultiplier for multiplying photoelectrons emitted from a ph

Details Photomultiplier for multiplying photoelectrons emitted from a ph Photomultiplier for multiplying photoelectrons emitted from a ph

1994-04-28

1996-11-05

Patel, Nimeshkumar

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313532, 313103CM, 313105CM, H01J 4322, H01J 4304

Patent

active

055720897

ABSTRACT:
A photomultiplier includes a photocathode and an electron multiplier. A typical structure of the electron multiplier is obtained such that a dynode unit constituted by stacking a plurality of dynode plates in the incident direction of photoelectrons, an anode plate, and an inverting dynode plate are stacked. The anode plate has electron through holes at a predetermined portion to cause secondary electrons emitted from the dynode unit to pass therethrough. Each electron through hole has a diameter on the inverting dynode plate side larger than that on the dynode unit side, thereby increasing the capture area of the secondary electrons orbit-inverted by the inverting dynode plate.

REFERENCES:
patent: 4649314 (1987-03-01), Eschard
patent: 4999540 (1991-03-01), L'hermite
Doulot et al, "Multianode Photomultiplier for Detection and Localization of Low Light Level Events", Paper Presented at Nuclear Science Symposium, Washington, Oct. 1986.

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