Electron discharge device having a ceramic member with means for

Details Electron discharge device having a ceramic member with means for Electron discharge device having a ceramic member with means for

1983-10-28

1985-11-19

DeMeo, Palmer C.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313541, 313544, H01J 3148, H01J 4328

Patent

active

045544816

ABSTRACT:
An improved electron discharge device comprises an evacuated envelope having at least one alumina ceramic insulator member. Within the device is a source of electrons, and an electron multiplier assembly including an anode. A high resistance material is diffused into the ceramic insulator to reduce luminescence within the insulator. The method of diffusion includes the steps of applying an opaque coating of a high resistance material to a surface of the ceramic insulator member and then firing the member in a reducing atmosphere at a temperature within the range of about 1500.degree. C. to 1550.degree. C. until the high resistance material diffuses into the surface of the member forming a diffusion region.

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H. R. Krall, "Extraneous Light Emission from Photomultipliers", IEEE Trans. Nucl. Sci., vol. NS-14, No. 1, pp. 455-459 (Feb. 1967).

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