Speaker
Description
To realize the dipole field beyond 15 T at 4.2 K, which is required by the proposed high energy accelerators for the next 20~30 years like SPPC or FCC-hh, High Temperature Superconducting (HTS) technology is the only choice due to its highest critical field over 100 T. IHEP has started the R&D of the HTS coils applied in the high field region with IBS and ReBCO from 2018. Significant progress has been achieved in the last years: IBS short sample cable reached 7 kA at 4.2 K, solenoid coils reached 49 A at 35 T background field, racetrack coils operated properly at 10 T dipole field with a compressive stress over 100 MPa; ReBCO racetrack coils reached 7 T dipole field standalone at 4.2 K in March 2025, and will be tested in a Nb3Sn background magnet in May 2025. This talk will present the latest progress of the HTS technology at IHEP and discuss with worldwide colleagues about the plan for next steps.