MetroVolt's operating point is frozen: R₀ 5.75 m, Ip 43.0 MA, B₀ 6.37 T, κ 2.56, δ −0.30, near-thermal Ti = Te = 48 keV — the Mode-D basis, ratified 24 July 2026 after a corrected-physics re-optimization, with the earlier Mode-C point retained as the labeled ceiling record. The 81 deposited analyses interrogate the point instead of quietly optimizing it — and when the corrected physics moved it, the move itself was published.
Design studies die by drift: each subsystem tunes the plasma to flatter itself, and the sum is a machine no single analysis ever checked. MetroVolt's freeze discipline forbids that. The deposited systems code (S76) closes all eight coupled constraints — density limit, β limit, safety factor, peak field, magnet stress, confinement requirement, radial build, and engineering gain — simultaneously at the frozen point.
Design-space studies exist (S77–S81), but they are explicitly quarantined: they explore around the point and are barred from altering it. When one of them found an adverse trend, it was published as one (S77, S79).
A frozen point is what makes 'check us' a real offer. Any reader can rerun the deposit and land on the same 1.22 GW operating card, the same q95, the same wall load — no hidden re-tuning between chapters, and the one re-basis in the record (Mode C → Mode D, 24 July 2026) is documented, not smoothed over. For partners and reviewers, that consistency is the product: a design you can audit is a design you can finance.
| Frozen geometry | R₀ 5.75 m · A 2.0 · κ 2.56 · δ −0.30 |
| Frozen operating current | 43.0 MA |
| Frozen field | B₀ 6.37 T (24.42 T peak) |
| Fusion power | 1.22 GW operating (hot-ion ceiling 2.41 GW, gated) |
| Constraints closed simultaneously | 8 of 8 (S76) |