Prospects for the use of high-Tc superconductors in fusion magnets and options for their test in SULTAN

► RE-123 tapes jc ≥ 500 A/cm (77 K) would enable fusion magnets operating above 20 K. ► Quench studies indicate that the protection of RE-123 fusion magnets is a challenge. ► Possibilities to test 50 kA class HTS conductors in SULTAN have been identified. ► HTS bus bar of large thermal resistance needed to connect sample and NbTi flux pump. ► Tests in the 20-50 K range require additional changes in the SULTAN cryogenics.