Non cross talk multi-channel photomultiplier using guided electr

Details Non cross talk multi-channel photomultiplier using guided electr Non cross talk multi-channel photomultiplier using guided electr

1993-10-22

1995-09-26

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502086, 25022728, 250239, H01J 4318, G01J 338, G01J 350

Patent

active

054536090

ABSTRACT:
An improved multi-channel electron multiplier is provided that exhibits zero cross-talk and high rate operation. Resistive material input and output masks are employed to control divergence of electrons. Electron multiplication takes place in closed channels. Several embodiments are provided for these channels including a continuous resistive emissive multiplier and a discrete resistive multiplier with discrete dynode chains interspaced with resistive layers-masks. Both basic embodiments provide high gain multiplication of electrons without accumulating surface charges while containing electrons to their proper channels to eliminate cross-talk. The invention can be for example applied to improve the performance of ion mass spectrometers, positron emission tomography devices, in DNA sequencing and other beta radiography applications and in many applications in particle physics.

REFERENCES:
patent: 3870877 (1975-03-01), Tolbird
patent: 3947841 (1976-03-01), Tumolillo

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