Photomultiplier tube having a grid type of dynodes

Details Photomultiplier tube having a grid type of dynodes Photomultiplier tube having a grid type of dynodes

1991-08-14

1993-10-19

DeMeo, Palmer C.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313533, 313536, 313104, 313105R, H01J 4318, H01J 4322

Patent

active

052549062

ABSTRACT:
An electron multiplier tube including a grid type of plural dynode arrays arranged in a first direction with a multistage structure for successively multiplying electrons incident thereto and an anode provided below the multistage structure of dynode arrays for collecting the multiplied electrons to output an amplified electrical signal, each of the dynode arrays including plural rod-shaped dynode elements arranged in a second direction and a mesh electrode provided over each of the dynode arrays for providing an equipotential, wherein the multistage structure of dynode arrays includes at least one group of neighboring dynode arrays whose dynode elements are arranged so as to be aligned with one another in the first direction without displacement. Each of the dynode elements has a substantially isosceles trapezoid section, both side legs of the trapezoid being slightly inwardly curved to effectively receive the incident electrons which have been emitted from a dynode array at an upper stage.

REFERENCES:
patent: 3579017 (1971-05-01), Vestal
patent: 4914351 (1990-04-01), Kuroda

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