Magnet system for nuclear spin tomography having superconducting

Details Magnet system for nuclear spin tomography having superconducting Magnet system for nuclear spin tomography having superconducting

1988-04-21

1989-05-23

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

335300, 335301, H01F 722

Patent

active

048334332

ABSTRACT:
A magnet system for a nuclear spin tomography installation contains annular superconducting coils for generating a magnetic background field and nonsuperconducting gradient coils. A hollow cylindrical thermal shield fits between the gradient coils and the superconducting coils. According to the invention, the thermal shield at the front faces is formed from tubular end pieces. The front faces have a greater specific electrical resistance than a tubular intermediate piece of the thermal shield that extends between the end pieces and cover at least the area of the gradient coils.

REFERENCES:
patent: 4291541 (1981-09-01), Kneip et al.
patent: 4651117 (1987-03-01), Kawaguchi et al.
patent: 4652824 (1987-03-01), Oppelt
patent: 4694269 (1987-09-01), Burnett et al.
patent: 4721934 (1988-01-01), Stacy
Standard Search Reports RS 78325 DE.
Cryogenics, Vol. 24, No. 2 (Feb. 1984), pp. 59-62.
Japanese Journal of Applied Physics, vol. 25, No. 6 (Jun. 1986), pp. L443-445.

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