Device for eliminating trap of magnetic flux in a superconductio

Details Device for eliminating trap of magnetic flux in a superconductio Device for eliminating trap of magnetic flux in a superconductio

1990-12-13

1992-12-22

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307310, 505825, 257 31, H03K 338, H03K 1792, H03K 19003, H03K 19195

Patent

active

051736209

ABSTRACT:
An apparatus for eliminating a magnetic flux from a superconducting circuit comprises a substrate on which a superconducting circuit is formed, a heating fixture including resistance heating elements and provided in the vicinity of the superconducting circuit, a driving unit connected to the heating fixture for energizing the same by supplying a drive current to each resistance heating elements in the heating fixture. The heating fixture is so configured that, upon energization of the resistance heating elements in the heating fixture, there is formed a region of normal conduction state characterized by a temperature that exceeds the critical temperature of the normal conduction-superconduction transition, in at least a part of the superconducting circuit, and such that the heating fixture produces a minimized magnetic field upon the energization of the resistance heating elements. The driving unit controls energization of the heating fixture such that the region of normal conduction state moves consecutively and continuously to a periphery of the superconducting circuit.

REFERENCES:
patent: 3478230 (1969-11-01), Otter, Jr. et al.
patent: 4361768 (1982-11-01), Rajeevakumar
patent: 4392148 (1983-07-01), Chang et al.
patent: 4764837 (1988-08-01), Jones
patent: 4869598 (1989-09-01), McDonald
patent: 4943792 (1990-07-01), Srivastava et al.

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