Surface conductive tilted channel plate electron multiplier

Claim 2

A channel-type electron multiplier comprising a tandem pair of non-conductive plates each having end walls of high conductivity material arranged in substantially parallel planes and a plurality of elongate channels opening at said end walls, said channels having surface of low conductivity material for producing secondary emission when impinged by an electron beam, channels in one plate being at least partially in registration with assigned channels in the other plate and channels in both plates extending substantially in the same direction and being inclined substantially at the same angle with respect to the planes of corresponding end walls.

Claim 3

A multiplier as claimed in claim 1 characterized in that the inner surface of each channel provides areas of differing conductivity.

Claim 4

A multiplier as claimed in claim 2 wherein the low-conductivity and the higher-conductivity walls of each channel are made of metal-containing glasses of similar composition except for a difference which allows the required difference in conductivity to be obtained by differential response to chemical reduction.

Claim 5

A multiplier as claimed in claim 1 wherein the angle of inclination is approximately 13*.

Claim 6

A multiplier as claimed in claim 1 wherein said plates are spaced apart by a distance comparable with the channel diameter.

Claim 7

A multiplier as claimed in claim 5 wherein the channels of the coupled channel plates are transversally displaced by a distance comparable with half a channel diameter.

Claim 8

A multiplier according to claim 1, wherein the facing end walls of said plates are in abutment with one another.

Claim 9

An electronic imaging tube comprising an evacuated envelope, a photo-cathode within said envelope, a luminescent screen within said envelope at the end opposite said photo-cathode, an electron multiplier positioned between said photo-cathode and said screen within said envelope, said electron multiplier comprising a tandem pair of plates of insulating material, a plurality of elongate channels of the surface-conducting type embedded in each plate in form of a matrix, and input and output Electrodes provided on the end walls of said plates and coupled to the conductive surfaces of said channels, said end walls being arranged in substantially parallel planes, the matrix in one plate being at least partially in registration with the matrix in the other plate, the channels in both matrixes extending substantially in the same direction and being inclined at the same angle with respect to the planes of said end walls, and means for energizing said electrodes.

Claim 10

An electronic imaging tube comprising an evacuated envelope, a photo-cathode within said envelope, a luminescent screen within said envelope at the end opposite said photo-cathode, an electron multiplier positioned between said photo-cathode and said screen within said envelope, said electron multiplier comprising a tandem pair of plates of insulating material, a plurality of elongate channels of the surface-conducting type embedded in each plate in form of a matrix, and input and output Electrodes provided on the end walls of said plates and coupled to the conductive surfaces of said channels, said end walls being arranged in substantially parallel planes, the matrix in one plate being at least partially in registration with the matrix in the other plate, the channels in both matrixes extending substantially in the same direction and being inclined at the same angle with respect to the planes of said end walls, and means for energizing said electrodes.