An Integrated High-Field REBCO Conductor and Winding System for Compact Fusion Magnets: Strain-First Design, Bore-Resolved Mechanics, and a Two-Machine Feasibility Map — Reproducible Code and Data

Reproducible code and data for a design-and-analysis study of a high-field REBCO magnet treated as one system — a multilayer "S.M.A.R.T." coated conductor built to a strain-first philosophy, and a bore-resolved winding method — applied across a spherical-tokamak breeder centrepost and a tandem-mirror burner plug. Using one bore-resolved mechanics (hoop stress σ ≈ ½·J_wp·B·a, validated to 0.8% against a closed-form Lamé solution), the binding constraint flips between the two machines: the ST centrepost is stress-comfortable with a realisable ~20 T-on-conductor design point (at B₀ ≈ 5 T) but is coil-field- and neutron-lifetime-limited, while the small-bore mirror plug is structurally infeasible at its physically required 0.648 m bore (2-D FEA: peak hoop stress 2916–4253 MPa, 2.7–3.9× the reinforced allowable; inner-turn strain 1.85–2.62%, 4.6–6.5× the 0.40% cap; pre-load trims ~11%). Field capability (REBCO H_c2 > 100 T, so 35 T is ~1/3 of the material limit) is kept strictly separate from coil feasibility throughout. Nothing is a Kronos measurement — Kronos has fabricated and measured no tape and built no coil. The conductor's three innovations are prior-art/incremental (V₂O₃ smart-quench = prior art; graphene-Al bypass = unsupported at the operating field; MP35N-as-substrate = infeasible); the genuinely new, separately filed contribution is a per-turn, as-built-data-driven winding method. Physics/engineering only; every number reproduces (seed 20260726). No named laboratory partner; validation is self-proposed future work. Companion to the Kronos Breeder (10.5281/zenodo.21746157) and Burner (10.5281/zenodo.21746479) deposits. CC BY 4.0. Authors: Ford, Priyanca Iyengar (ORCID 0000-0003-0395-1752) · Weggel, Robert J · Weggel, Carl — all Kronos Fusion Energy.