Superconductor quench measuring device which evaluates reflected

Details Superconductor quench measuring device which evaluates reflected Superconductor quench measuring device which evaluates reflected

1991-02-11

1993-01-12

Harvey, Jack B.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324527, 324 716, 505843, G01R 3111

Patent

active

051793423

ABSTRACT:
In a method and apparatus for detecting and locating a quench zone in a superconducting coil, a sensor is positioned adjacent to and in heat transfer communication with the entire length of the superconducting coil. When a portion of the superconducting coil becomes normal, the adjacent portion of the sensor becomes resistive. A series of electrical pulses sent along the sensor are reflected back by the discontinuity in impedance which occurs at such a normal zone. The reflected pulses and echo pulses produced by various terminations on the sensor are detected by an associated receiver and processor which calculates the location of the resistive zone along the sensor and the corresponding quench zone along the superconducting coil using information derived from the pulses. A second embodiment provides two sensors which are adjacent to and in heat transfer communication with the coil which are pulsed from opposite ends.

REFERENCES:
patent: 3510762 (1970-05-01), Leslie
patent: 4023412 (1977-05-01), Luke et al.
patent: 4371943 (1983-02-01), Woods et al.
patent: 4978922 (1990-12-01), Mallick, Jr. et al.
patent: 4996472 (1991-02-01), Mallick, Jr.

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