Overview
- ETH Zürich reports two all‑HTS prototypes in Science Advances: a two‑pancake design at about 38 tesla and a four‑pancake stack reaching 42.3 tesla.
- The coils fit a 3.1 mm bore inside a roughly 63 mm outer diameter, shrinking high‑field capability into a palm‑sized form factor.
- Built from REBCO tape using no‑insulation winding, full‑coil soldering, and continuous‑loop construction, the magnets achieve current densities up to 2,257 A/mm^2.
- Initial nuclear magnetic resonance experiments were performed in the 3.1 mm bore, with plans to push direct NMR measurements beyond 40 tesla and a patent application in progress.
- The devices draw under 1 watt of power, approaching the 45.5‑tesla national‑lab benchmark that consumes tens of megawatts and surpassing the prior all‑HTS mark near 26 tesla.