General Electric Company

Dan Arthur Gross

Mark Ernest Vermilyea

Timothy John Havens

Constantinos Minas

Bu-Xin Xu

David Charles Mack

A superconductive-magnet electrical circuit includes a superconductive-coil assemblage having a second coil portion coupled in series with and between first and third coil portions with the third coil portion coupled in series with and between the second and a fourth coil portion. A bipolar current-bypass electrical-circuit element (such as a pair of diodes opposingly coupled together in parallel) has: an impedance less than generally one-thousandth that of the coil portions; a first terminal coupled in parallel with the first and second coil portions; and a second terminal coupled in parallel with the third and fourth coil portions. A localized quench in one coil portion will be quickly shared with the other coil portions to reduce damage from the quench.

Superconducting-magnet electrical circuit offering quench protection

A quench-protecting superconductive-magnet electrical circuit. An impregnated superconductive-switch wire is coupled to the leads of a cryostable superconductive-coil assemblage having series-coupled coil portions. Series-coupled fan-in resistive heaters are also coupled in parallel with corresponding coil portions and are positioned thermally proximate the superconductive-switch wire. Fan-out resistive heaters are coupled in parallel with corresponding coil portions and are positioned thermally proximate corresponding coil portions. A local quench in one coil portion activates its corresponding fan-in resistive heater which quenches the superconductive-switch wire which activates all of the fan-out resistive heaters which globally quenches all of the coil portions thereby preventing local quench damage.

Quench-protecting electrical circuit for a superconducting magnet

A superconductive-magnet electrical circuit includes a superconductive-coil assemblage having first, second, third, and fourth coil portions sequentially coupled together in series. A bipolar current-bypass electrical-circuit element (such as a pair of diodes opposingly coupled together in parallel) has:

Superconducting-magnet electrical circuit having voltage and quench

A superconductive magnet having a superconductive coil located within a thermal shield located within a vacuum enclosure. A magnet re-entrant support assembly includes an outer support cylinder located between the vacuum enclosure and the thermal shield and includes an inner support cylinder located between the thermal shield and the superconductive coil. The outer support cylinder's first end is rigidly connected to the vacuum enclosure, and its second end is rigidly connected to the thermal shield. The inner support cylinder's first terminus is rigidly connected to the thermal shield near the outer support cylinder's second end, and its second terminus is located longitudinally between the outer support cylinder's first and second ends and is rigidly connected to the superconductive coil. Buckling resistance is improved by adding stiffening rings to the support cylinders.

Superconducting magnet with re-entrant tube suspension resistant to

This invention relates to an apparatus and method for measuring the resistance of superconductors. Structures of this type, generally, allow the resistance of the superconductor to be accurately measured in a non-destructive manner by using a bifilar coil which includes an integrated loop/switch formed from the bifilar coil.

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Niskayuna, NY, United States of America

Dan Arthur Gross