Scenario
Loading the Python engine (Pyodide + numpy, ~5–15 s on
first visit — the SAME fusion_core package runs in your browser; no
physics is re-implemented in JavaScript)…
Inputs require explicit units; the electron temperature is never inferred. Invalid inputs are rejected with the engine's own error codes before anything is computed.
Evidence — equations & sources
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Result
Run a scenario to see outputs, warnings
and content-addressed provenance.
Sweep
Sweeps run entirely in your browser
(max 15 points). Unlike quantities are shown in separate panels.