# Closure Validation Report

## Precise-QS fixed-field interior max relative error vs archived SFINCS

| Case | Redl | NTX+NEOPAX |
| --- | ---: | ---: |
| QA | `6.857e-02` | `8.305e-02` |
| QH | `4.063e-02` | `9.954e-02` |

## W7-X integrated transfer

| Metric | Value |
| --- | ---: |
| Rebuilt raw-branch max relative error | `1.830e-02` |
| `Pmax=4` transfer error | `4.942e-01` |

## Fixed-field closure diagnostics

The NTX+NEOPAX current column below is a reduced-closure total-current stress diagnostic. It now passes the fixed-field interior gate, but it is still not an independent species-current parity claim.

Decision: `fixed-field-stress-gate-passed`. The fixed-field branch uses `d33_mode=spitzer` and `n_order=2`. No fitted bridge constants or benchmark-specific scale factors are used.

| Case | Current | Raw thermal fit | Effective thermal fit |
| --- | ---: | ---: | ---: |
| QA | `8.305e-02` | `2.360e-01` | `1.962e-01` |
| QH | `9.954e-02` | `3.127e-01` | `2.802e-01` |

## Higher-order closure stress

| Max successive precise-QS change across `Pmax` | `1.108e-01` |
