Laminated channel plate electron multiplier

Details Laminated channel plate electron multiplier Laminated channel plate electron multiplier

1982-10-15

1985-10-01

Demeo, Palmer

Electric lamp and discharge devices

Photosensitive

Secondary emitter type

313105CM, 313399, H01J 4310, H01J 4328

Patent

active

045448604

ABSTRACT:
In a laminated channel plate electron multiplier, an apertured metal sheet (32) is disposed at a small distance (30 .mu.m) from the outer surface of the input dynode and is used to provide a small negative field for turning back stray secondary electrons which have sufficient energy to follow trajectories across the input side of the input dynode. More particularly, the areas between the apertures of the input dynode (22) are masked by a material (34) having a secondary electron emission coefficient of less than 2, which material (34) is provided on the outer surface of the apertured metal sheet (32), the metal sheet (32) being spaced from the input dynode (22) by an insulating material (36). A potential of the order of -10 V relative to the input dynode is applied to the apertured metal sheet (32).

REFERENCES:
patent: 3760214 (1973-09-01), Yamazaki et al.
patent: 4023063 (1977-05-01), King et al.
patent: 4422005 (1983-12-01), Washington et al.

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