System for measuring characteristics of electron emitting source

Details System for measuring characteristics of electron emitting source System for measuring characteristics of electron emitting source

1988-04-27

1990-01-16

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158D, 324411, G01R 2900, G01R 3126

Patent

active

048946117

ABSTRACT:
A measuring system particularly suitably usable with an apparatus having a plurality of electron emitting sources, for measuring the characteristics of the electron emitting sources is disclosed. In the measuring system, the electron emitting sources are driven so that they emit electron flows of predetermined and different frequencies. The emitted electron flows are collected and, thereafter, only those signals having components corresponding to the predetermined frequencies are extracted. Based on the extracted signals, the characteristics of the electron emitting sources are measured at the same time and independently of each other.

REFERENCES:
patent: 1406996 (1922-02-01), Morrill
patent: 2782366 (1957-02-01), Wall
patent: 3324395 (1967-06-01), Springer
patent: 4259678 (1981-03-01), van Gorkom et al.
patent: 4325084 (1982-04-01), van Gorkom et al.

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