Diagnostic Health Mosaic
A single glanceable map of the 60+ diagnostic ports — which are healthy, degraded, dead, or imputed — because everything the operator trusts rests on this.
The foundation under every other number
Every estimate, KPI, and forecast on every L6 surface ultimately rests on the diagnostics feeding the twin. If an operator does not know which sensors are healthy, they cannot properly weight anything downstream. The diagnostic health mosaic is a compact map of the machine's 60+ diagnostic ports — Mirnov coils, flux loops, interferometry, Thomson scattering, neutron detectors, REBCO strain gauges, and more — each colored by health so the whole measurement front is readable at a glance.
Four states per diagnostic
| State | Meaning for downstream trust |
|---|---|
| Healthy | measured, full weight |
| Degraded | noisy or drifting; reduced weight, wider bands |
| Dead | no signal; masked, excluded from estimates |
| Imputed | reconstructed by the GNN from neighbors; flagged everywhere |
Fusion diagnostics degrade under neutron and thermal load, so this map is dynamic and consequential. When a Mirnov coil drops and the GNN imputes it, the mosaic shows the port as imputed, and that state propagates: the equilibrium estimate's provenance names the imputation, its confidence widens, and the affected overlay region shows hatching. The mosaic is where the operator first sees the cause of a confidence change elsewhere.
Trend, not just snapshot
The mosaic shows not only current state but degradation trend, so an operator can see a diagnostic drifting toward failure and plan around it before it is lost mid-shot. Calibration-drift tracking feeds this view, distinguishing a genuine physics change from an instrument going out of calibration. For both machines, sustained diagnostic-availability is a first-order KPI precisely because it gates trust in everything else.
The mosaic is the operator-facing face of signal validation and GNN imputation from L2/L3, and it directly drives confidence and provenance and the hatching in the 3D overlay. Its availability metric appears on the dashboards.