Superconducting magnet superconducting magnet coil, and manufact

Details Superconducting magnet superconducting magnet coil, and manufact Superconducting magnet superconducting magnet coil, and manufact

1996-01-31

1997-02-25

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

336DIG1, 323360, 505211, 505879, H01F 100, H01F 3600, H01F 600, H01B 1200

Patent

active

056063008

ABSTRACT:
A superconducting magnet coil, an insulating layer, and a superconducting magnet which do not generate quenching under cooled and operational conditions are provided by using a fixing resin capable of suppressing microcrack generation in a resin layer which causes quenching.
A superconducting magnet coil manufactured by winding a superconducting wire and fixing the wire with resin and a method for manufacturing thereof, wherein said resin is a low cooling restricted thermal stress and high toughness fixing resin having a release rate of elastic energy G.sub.IC at 4.2 K. of at least 250 J.multidot.m.sup.-2, and/or a stress intensity factor K.sub.IC of at least 1.5 MPa.multidot..sqroot.m, and/or a stress safety factor at 4.2 K. of at least 3, and an allowable defect size at least of 0.3 mm.
The superconducting magnet coil manufactured in accordance with the present invention does not cause quenching because microcracks are not generated in said resin when the coil is cooled to the liquid helium temperature, i.e. 4.2 K., and under an operational condition.

REFERENCES:
patent: 5189386 (1993-02-01), Tada
Patent Abstracts of Japan, vol. 13(110), Mar. 16, 1989.
Patent Abstracts of Japan, vol. 13(352), Aug. 8, 1989.
Van de Voorde, M, "Results of physical tests on polymers at Cryogenic temperatures," cryogenics, 16(5), 296-302, 1976.
Steger, V. Y., "Evaluation of two polyurethane resins for injection shimming of the MFTF magnet," Report UCRL-15175, CASD-222-79-004, 1980.

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