Speaker
Description
The Falcon D (Future Accelerator post- LHC Cos-theta Optimised Nb3Sn dipole) dipole is part of the High Field Magnet (HFM) program. CERN in collaboration with the Italian Institute for Nuclear Physics (INFN Genova and LASA Milano), is developing the design of cos theta dipole magnet beyond 11T based on proven Nb3Sn technology in the MQXF quadrupoles used in the high-luminosity upgrade of the LHC. The magnet, with aperture diameter of 50 mm and a bore field of 12 T, can give a 73 TeV center of mass energy for the Future Circular Collider FCC-hh. The collaboration has specific objectives to design and investigate a cos theta coil design based on a two-layer coil with the largest possible cable. Moreover, the study of mechanical structures based on Al rings and bladder and keys technology developed in High Lumi MQXF quadrupole will be presented as a baseline for a cos dipole coil. The baseline of the structure preloading and a collared assembly variant shall be tested on mechanical mock ups at 77 K prior to build two single then a 2-in-1 accelerator magnet models using 1.5 m long Nb3Sn two-layers coils. In this paper, we provide an overview of the CERN Falcon D magnet project plan, the status of various preliminary turns winding trials outcomes, and the detail design of the magnet model structure proposal. Based on the given cable winding behavior and mechanical measured properties features, some alternative magnetic optimized coil cross section with ends and mechanical design for the Nb3Sn 1-in-1 dipole model is reported.
