Conceptual Design of 20 T Hybrid Accelerator Dipole Magnets

Hybrid magnets are currently under consideration as an economically viable option towards 20 T dipole for next generation of particle accelerators. In these magnets, High Temperature Superconducting (HTS) materials used in the high field part coil with so-called “insert coils”, and Low Superconductors (LTS) like Nb 3 Sn Nb-Ti superconductors lower region “outsert coils”. The attractiveness hybrid lays on fact that, one hand, level is beyond practical limits 15-16 accelerator can be achieved only via HTS materials; other cost compared to LTS makes it advantageous exploring a approach, where portion minimized. We present this paper overview different design options aimed at generating 50 mm clear aperture. layouts investigated include Cos-theta (CT), its variations reduce conductor peak stress, namely Canted (CCT) Stress Management (SMCT), and, addition, Block-type (BL) including form stress management Common-Coil (CC). Results from magnetic mechanical analysis discussed, particular focus comparison between regarding quantity superconducting material, quality, quench protection.