Arc discharge abnormality detecting system

Details Arc discharge abnormality detecting system Arc discharge abnormality detecting system

1983-12-12

1986-05-13

Tokar, Michael J.

Electricity: measuring and testing

Electric lamp or discharge device

Vacuum tube

324140R, G01R 31024

Patent

active

045889520

ABSTRACT:
The present invention provides an arc discharge abnormality detecting system which in generating source plasma by the arc discharge using a plurality of filaments as the cathode in an ion source, detects an arc discharge current flowing in each of the filaments and detects the abnormality in the arc discharge when the arc discharge currents are not balanced. Further, the present invention provides an arc discharge abnormality detecting system in which said ion source is an ion source used in a neutral beam injector and a logic circuit detects the abnormality in the arc discharge when unbalance in the arc discharge currents larger than a predetermined value exists between the filaments over a predetermined period of time continuously.

REFERENCES:
patent: 3812431 (1974-05-01), Fry

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