Magnetic resonance apparatus comprising a superconducting magnet

Details Magnetic resonance apparatus comprising a superconducting magnet Magnetic resonance apparatus comprising a superconducting magnet

1993-12-02

1995-06-20

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, 324322, G01R 3320

Patent

active

054263662

ABSTRACT:
The apparatus comprises a magnet system which is rotationally symmetrically arranged about a central axis (9) and which comprises a superconducting inner coil system (1) for generating a steady magnetic field in a measurement space (5) within the magnet system, and also comprises an outer coil system (7) which is arranged so as to be coaxial with the inner coil system and which is electrically connected in series therewith in order to shield the environment from the magnetic field generated by the inner coil system. The magnet system can be bridged by of a superconducting persistent current switch (33) and comprises a superconducting shunt (37) which bridges a pan of the magnet system which is situated between first and second connection points (39, 41). In order to improve the shielding of the measurement space (5) from the effects of external magnetic fields, at least one turn of a coil (17) forming part of the magnet system is situated between at least one of the connection points (39, 41) and the nearest end of the inner coil system (1 ). The shielding effect can be further enhanced by utilizing more than one shunt (37, 53).

REFERENCES:
patent: 4680666 (1987-07-01), Rios
patent: 4926289 (1990-05-01), Reichert
patent: 5045826 (1991-09-01), Laskaris
patent: 5084677 (1992-01-01), McDougall
patent: 5235282 (1993-08-01), Overweg et al.
patent: 5245306 (1993-09-01), Overweg
patent: 5276399 (1994-01-01), Kasten et al.
patent: 5329266 (1994-07-01), Soeldner et al.

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