Replication Data for: Four Coupled Digital Twins for a Compact Spherical-Tokamak Breeder: Multi-Rate Co-Simulation, Propagated Uncertainty, and a Real-Time Self-Consistency Monitor
Year: 2026
Type: dataset
Abstract: Replication data for the paper Four Coupled Digital Twins for a Compact Spherical-Tokamak Breeder: Multi-Rate Co-Simulation, Propagated Uncertainty, and a Real-Time Self-Consistency Monitor (Kronos Fusion Energy 2026 Publication Series, paper 2.73), published at doi:10.5281/zenodo.22645805. Abstract of the paper. Autonomous operation of a compact, high-power-density spherical tokamak leaves little time to react and no tolerance for an unmodelled excursion, so the controller must act on a model that runs ahead of the plant across every coupled physical domain at once. We formalise a four-twin real-time architecture for the Hyperion breeder (design point I_p=9.66, Q=3.076, P_ fus=85.04, negative triangularity δ=-0.30, B_0=8, elongation κ=2.0, major radius =1.20, aspect ratio A=2.5, centrepost peak field 16.84). An MHD-stability twin, a thermomechanics twin, a neutronics twin and a power-systems twin are advanced by a conserving multi-rate co-simulation: each twin integrates at its own step and the twins reconcile on a common macro-step, with energy and poloidal-flux gates that are the machine-checkable form of the coupling-consistency requirement. We cast the coupling as a waveform-relaxation fixed-point iteration and give its contraction condition; we discretise the free-boundary Grad–Shafranov equation with a five-point operator and demonstrate the design-point O(h^2) convergence in a controlled numerical experiment (relative RMS from 2.9×10^-3 to 8.3×10^-5 over the refinement sweep); and we prove, in a Hamiltonian co-simulation test, that the energy defect closes as O( t_ macro) so that the conservation gate can always be met by macro-step reduction. What this dataset contains data/key_values.csv and data/anchors.json: the frozen design-point values quoted in the paper (symbol, value, unit, provenance), in machine-readable form. data/verification.csv: the validator gates the paper cites, each with its verdict and a link to a live recompute page. figures/: the figures from the paper, as vector PDF, with an inventory. four-coupled-digital-twins-for-a-compact-spherical-toka.data-methods.pdf: methods, the computational codes used, and the full value table. data/data_dictionary.md: column definitions. Every value is a frozen design-point number that is independently re-run and recorded in the Kronos Physics De-Risking Register (doi:10.5281/zenodo.22645689). The paper itself is not duplicated here; read it at the DOI above.
Source: Harvard Dataverse
DOI: 10.7910/dvn/jrpadz
Authors: Ford, P I, Kulcinski, G L
Language: English
Subfield: Modeling and Simulation
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7214652529