Field-emission ion source with spiral shaped filament heater

Details Field-emission ion source with spiral shaped filament heater Field-emission ion source with spiral shaped filament heater

1982-11-22

1985-11-05

DeMeo, Palmer C.

Electric lamp and discharge devices

With positive or negative ion acceleration

Supplying ionizable material

313 16, 313230, H01J 3302, H01J 4910

Patent

active

045516502

ABSTRACT:
The field-emission-type ion source according to the present invention comprises an emitter tip, a heater, a reservoir which stores material to be ionized, an extracting electrode situated at the front end of the emitter tip, and a coating-layer which is refractory and anti-reactive with the material to be ionized and which is coated on at least the heater of the emitter tip and heater, in order to prevent their reactions with the material to be ionized.

REFERENCES:
patent: 4088919 (1978-05-01), Clampitt et al.
patent: 4367429 (1983-01-01), Wang et al.

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