Summary
This paper presents the design and fabrication strategy for the FCC Flared-end Dipole Demonstrator (F2D2), a high-field superconducting magnet under development by CEA in collaboration with CERN for the Future Circular Collider programme. The magnet employs Nb₃Sn block-coil technology with graded cables and shell-based support structure, targeting 15 Tesla at 1.9 Kelvin. The primary technical novelty lies in implementing joint concepts between different conductor grades within a Nb₃Sn block dipole for the first time.
UK applicability
This research is not applicable to Vitagri's focus on farming systems, soil health, nutrient density, and human health. The paper concerns high-energy physics infrastructure development and has no relevance to agricultural or nutritional outcomes.
Key measures
Magnetic field strength (≥15 T), operating temperature (1.9 K), performance margin (14%), magnet length (1.5 m), critical current density of available conductors
Outcomes reported
This paper reports on the design and fabrication approach for the FCC Flared-end Dipole Demonstrator (F2D2), a 1.5-metre Nb₃Sn block dipole magnet capable of producing at least 15 Tesla at 1.9 Kelvin with 14% margin. The study details magnetic and mechanical design specifications, conductor grading strategies, and fabrication techniques, with particular focus on joint concepts between conductor grades.
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