Field emission electron gun with anode heater and plural exhaust

Details Field emission electron gun with anode heater and plural exhaust Field emission electron gun with anode heater and plural exhaust

1979-02-01

1981-10-13

Segal, Robert

Electric lamp and discharge devices

With evacuating pump

313180, 250457, H01J 716

Patent

active

042950724

ABSTRACT:
In a field emission electron gun including heating means for heating an anode to prevent gas emission from the anode due to bombardment thereof by the electron beam emitted from the cathode, the present invention provides a field emission electron gun including first exhaust means for defining a first chamber including the cathode and for exhausting said chamber to vacuum, and second exhaust means separate from said first exhaust means defining a chamber including said anode heating means for exhausting said chamber to vacuum independently of the first exhaust means. This construction makes it possible to maintain the chamber including the cathode constantly in the high vacuum state.

REFERENCES:
patent: 2424791 (1947-07-01), Bachman et al.
patent: 3728570 (1973-04-01), Smith et al.
patent: 4019077 (1977-04-01), Sakitani
patent: 4140905 (1979-02-01), Polanyi

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