Superconductor magnet coil configuration
View Patent ↗A superconducting magnet coil configuration comprising at least one section of a superconducting strip conductor, which is continuously wound in a cylindrical winding chamber ( 1 ) between two end flanges ( 2, 3 ) in several solenoid-like layers is characterized in that the section comprises an axial region of reduced current density (=notch region ( 12 )), and the winding chamber ( 1 ) in the notch region ( 12 ) contains a first separating body ( 4 ) with a truncated conical envelope ( 5 ) which axially divides the winding chamber ( 1 ) into two partial chambers ( 6, 7 ), the superconducting strip conductor being guided over the truncated conical envelope ( 5 ) of the first separating body ( 4 ) from one partial chamber ( 6 ) into the other partial chamber ( 7 ) via a single-layer transfer winding ( 9 ), and a second separating body ( 10 ) is provided which supplements the first separating body ( 4 ) in the notch region ( 12 ) in a radial outer direction to form a circular cylinder, wherein the single-layer transfer winding ( 9 ) is disposed between the separating bodies ( 4, 10 ). The inventive magnet coil configuration thereby realizes an HTS coil with a notch region for correcting inhomogeneities, wherein bending of the strip conductor through a small radius of curvature is not necessary.
1. A superconducting magnet coil configuration comprising:
a first end flange;
a second end flange, said first and said second end flanges limiting and defining a cylindrical winding chamber;
a first separating body disposed in a central region of said winding chamber to axially divide said winding chamber into a first and a second partial chamber, said first separating body having a truncated conical outer envelope;
a second separating body disposed radically outside of said first separating body in a complementary fashion to define, together with said first separating body, a substantially circular cylinder; and
a superconducting strip conductor continuously wound in several solenoid-like layers within said winding chamber, said strip conductor passing between said first and said second separating body as a single-layer transfer winding extending from said first partial chamber into said second partial chamber, said transfer winding, said first separating body, and said second separating body constituting a notch region of reduced current density.
2. The magnet coil configuration of claim 1 , wherein said superconducting strip conductor is a high-temperature superconductor, contains silver-stabilized Bi—Sr—Ca—Cu oxide, or contains YBCO.
3. The magnet coil configuration of claim 1 , wherein said conical envelope of said first separating body is spirally stepped to guide said superconducting strip conductor.
4. The magnet coil configuration of claim 1 , wherein a surface of said second separating body facing said first separating body is spirally stepped.
5. The magnet coil configuration of claim 1 , wherein a winding slope of said superconducting strip conductor in said notch region is increased compared to said winding slope in said first and said second partial chambers.
6. The magnet coil configuration of claim 1 , wherein a winding slope of said superconducting strip conductor is maintained in said notch region.
7. The magnet coil configuration of claim 1 , wherein said notch region is axially displaced from a symmetrical configuration to compensate for field effects of first order generated by said transfer winding.
8. The magnet coil configuration of claim 1 , wherein said first separating body is integral with an inner floor of said winding chamber.
9. The magnet coil configuration of claim 1 , wherein winding layers are continuously wound between said end flanges radially outside and/or radially inside said notch region.
10. The magnet coil configuration of claim 1 , wherein said superconducting strip conductor is formed from stacked conductor strips which are electrically connected in parallel.
11. The magnet coil configuration of claim 1 , wherein the magnet coil configuration is superconductingly short-circuited.
12. The magnet coil configuration of claim 1 , wherein the magnet coil configuration is a high-field NMR magnet in a center of which an extremely homogeneous magnetic field is generated.