Speaker
Description
Next-generation high-energy accelerators like SPPC or FCC need thousands of accelerator magnets with the field strength of 16-24 T. Advanced high-field superconducting materials with significant lower cost and better mechanical properties will help improve the feasibility of such projects to a reasonable level. Since 2008, iron-based superconductors (IBS) have been discovered and attracted wide interest for both basic research and practical applications, which has a high upper critical field beyond 100 T, strong potential current carrying capacity and much lower expected fabrication cost. IHEP and IEE started collaboration in developing high field magnet technology with IBS materials in 2018. The 1st IBS solenoid model coil was fabricated and tested at 24 T background field in 2019; the highest current of IBS model coil has reached 60 A at 32 T recently. IHEP also fabricated several racetrack coils with 100-m long IBS tapes; the quench current at 10 T reached over 80% of its quench current at self-field. Moreover, a 1.3 kA IBS transposed cable has been successfully fabricated and the high field performance is being tested; a new cable with the critical current of over 5 kA is to be fabricated and tested in 2024. An overview of IBS cables, model coils status and application prospects on future high-energy accelerators will be presented.
