WP19: High Field Magnets R&D - Fresca2

The aim of the WP is to develop the technologies for High Field Magnets (HFM). The conductor forms the heart of a superconducting magnet and thus one of the most important subjects of high field magnet development is the conductor R&D. The next step beyond the Nb-Ti technology (used for the LHC magnets, which reaches a maximum field of 10 T), is to use Nb3Sn technology to go up to 15 T. The following step, after Nb3Sn, would consist of using High Temperature Superconductors (HTS), not for their ability to function at these higher temperatures (>20 K instead of <8 K) but because they are able to carry large current densities up to very high fields (>20 K) when used at low temperatures (<5 K). The subsequent step is the development of high field magnets from which the Fresca2 magnet is a basic technology carrier.

WP19 is closely related to the EuCARD WP7-HFM but it covers a wider range of subjects, especially on the conductor development.

WP19 has the following tasks:

  •  Conductor development: understanding the basic physics mechanisms inside Nb3Sn conductors and HTS conductors (Bi2212 and YBCO). Development of cables with Nb3Sn strands and HTS tapes.

  •  Magnet development in Nb3Sn: design, construct and test small racetrack magnets to learn how to make coils and how to assemble them into magnets (Short Model Coil, Racetrack Model Coil).

  •  Magnet development in Nb3Sn: design, construct and test a 1.5 m long 100 mm aperture dipole magnet with a nominal field of 13 T (and an ultimate field of 15 T), Fresca2. This magnet will later be used in the Fresca2 test station as a cable test facility. This project is done together with CEA-Saclay as task 7.3 in the EuCARD project.

  •  Magnet development in HTS: design, construct and test a 5 T HTS insert magnet. This project is done together with several partners as task 7.4 in the EuCARD project.

  •  Studies on the thermal behavior of magnets. This project is partly done together with several partners as task 7.2 in the EuCARD project.

  •  Studies on the radiation hardness of insulators and superconductors for magnets. This project is partly done together with several partners as task 7.2 in the EuCARD project.

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