Multi-anode type photomultiplier tube

Details Multi-anode type photomultiplier tube Multi-anode type photomultiplier tube

2004-03-24

2009-02-10

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

Photosensitive

Having plural anodes or cathodes

C313S535000, C313S533000, C313S532000, C250S2140VT, C250S367000

Reexamination Certificate

active

07489077

ABSTRACT:
A glass container has a faceplate, a side tube, and a bottom. A photocathode is formed on the inner side of the faceplate. The glass container includes a partitioning wall, a shield electrode, a first dynode, a second dynode, a dynode array, and an anode. The partitioning wall has a cross shape to divide an electron focusing space into four space segments. The shield electrode is provided to shield the second dynode from the photocathode. A Venetian blind type of dynodes is provided as the dynode array. The first dynode, the second dynode, the dynode array, and the anode are maintained at the potential which is higher than that of the photocathode. Electrons emitted from the photocathode in response to incident light thereon efficiently impinge on the dynodes regardless of where the electrons are emitted. The electrons are multiplied and then detected by the anode.

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