Alexey Radovinsky is an 🏷️#engineer at 📝Commonwealth Fusion Systems working on high-field magnet design, and previously published from the 📝MIT Plasma Science and Fusion Center, including on the 📝Toroidal Field Model Coil. He is lead author of the 2023 paper setting out the design of a pair of compact 📝REBCO coils for a 📝magnetic mirror — a confinement geometry that is not a 📝tokamak at all.

Each magnet weighs under two tons and reaches roughly 20 📝tesla on the tape and 17 tesla at the bore: eight dry-wound, partially insulated single 📝pancake windings in series, conduction-cooled by cryocoolers to 20 kelvin rather than immersed in liquid helium, with field-induced stress carried by keyed partitions and cold-mass supports rated to hold over 60 tons of axial load. The 2023 paper is a design; the 2025 follow-up, on which Radovinsky is second author to Grant Kristofek, reports what happened when the pair was actually built — design, construction, assembly and full-field dual-magnet factory acceptance testing all completed. The coils are CFS-built hardware supplied as high-field end coils to an 📝ARPA-E-funded mirror project led by the University of Wisconsin–Madison, so the magnets have been tested but the device they serve has not been operated. Radovinsky also leads a 2024 analytical method for force-balanced tokamak magnets, which reduces winding stress by orienting non-planar coils so that electromagnetic forces cancel locally, and a 2025 method for 📝quench detection that works on both insulated and 📝no-insulation windings, where conventional voltage-based detection fails.