HTS magnet sections
There is disclosed an assembly for carrying electrical current in a coil of a magnet. The assembly comprises a pre-formed housing of thermally and electrically conductive material (e.g. copper) which comprises a channel configured to retain HTS tape. A plurality of layers of HTS tape are fixed within the channel. The channel has at least one pre-formed curved section.
1. An assembly for carrying electrical current in a coil of a magnet, comprising:
a pre-formed housing comprising a channel configured to retain HTS tape, the channel including at least one pre-formed curved section; and
a plurality of layers of HTS tape fixed within the channel;
wherein the pre-formed curved section has a radius of curvature which is less than a total thickness of the layers of HTS tape in that section divided by twice a maximum permitted strain of the HTS tape.
2. An assembly according to claim 1 , wherein the pre-formed curved section is curved in such a way that the layers of HTS tape fixed within the channel are bent only around an axis or axes parallel to a plane of the HTS tape.
3. An assembly according to claim 2 , wherein the channel includes a twist to enable HTS tape to be curved in two planes around the axes parallel to the plane of the HTS tape as it is laid into the channel.
4. An assembly according to claim 1 , wherein the pre-formed housing is substantially rigid.
5. An assembly according to claim 1 , wherein a cross section of the pre-formed housing varies over at least a section of its length.
6. An assembly according to claim 1 , wherein a number of layers of HTS tape varies along the length of the assembly.
7. An assembly according to claim 1 , wherein a current carrying capacity of the HTS tape varies along the length of the assembly.
8. An assembly according to claim 1 , and comprising a joint region, wherein the HTS tape in the joint region is positioned on an outer surface of the assembly, such that the HTS tape is brought into contact with HTS tape of a corresponding assembly when the outer surfaces of the joint regions of said assemblies are brought together.
9. An assembly according to claim 1 , wherein the housing comprises one or more coolant channels configured to allow a coolant to flow through the assembly.
10. An assembly according to claim 1 , wherein the housing is formed from thermally and electrically conductive material.
11. An assembly according to claim 10 , wherein the thermally and electrically conductive material comprises copper.