Summary
This experimental study reports the fabrication and characterisation of artificial pinning centre (APC) Nb₃Sn superconductor wires with physical subelement sizes of 34 and 24 μm, designed to reduce persistent-current magnetization and hysteresis losses for next-generation accelerator magnets. The 24 μm wire demonstrated non-copper critical current density exceeding High-Luminosity LHC specifications above 17.5 T whilst achieving magnetization and hysteresis losses of only 17% and 23% respectively of conventional RRP® reference wires. The findings suggest APC wires offer a viable pathway to simultaneously improve field quality and reduce cryogenic heat load in future collider magnet systems.
UK applicability
This work is peripheral to UK agricultural and food systems research. The findings are relevant only to UK-based particle physics research infrastructure (e.g., STFC facilities) and superconductor materials research communities.
Key measures
Non-copper critical current density (Jc) at various magnetic fields (4.2 K, 18 T; 17.5 T); magnetization at 1 T (ΔM(1 T)); hysteresis loss for field cycles 1–14 T (Qh(1–14 T)) and ±3 T (Qh(±3 T))
Outcomes reported
The study fabricated and characterised artificial pinning centre (APC) Nb₃Sn superconductor wires with small subelement sizes, measuring critical current density (Jc), magnetization, and hysteresis loss compared to conventional restacked-rod-process (RRP®) wires.
Topic tags
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