# Radiation-aware 2.5D validation

- Analytic-slab finest relative error: **1.444e-04**
- DtN derivative relative error: **3.465e-10**
- Nonlinear objective-gradient relative error: **2.696e-05**

- Production Q gain: **2.156920x**
- Refined Q gain: **2.018444x**
- Initial/final field correlations: **0.983866 / 0.984896**
- Production/refined final Q: **33.115815 / 32.807679**
- Cross-basis gate: **PASS**

Overall gate: **PASS**

Passing this gate establishes a working, basis-stable reduced optimizer.  It
does not replace full-vector 3D pole, grid, or radiation validation.