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Add source-weighted helium residence diagnostics and example - #167

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rogeriojorge wants to merge 7 commits into
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feature/helium-ash-diagnostics
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rogeriojorge wants to merge 7 commits into
mainfrom
feature/helium-ash-diagnostics

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@rogeriojorge

@rogeriojorge rogeriojorge commented Oct 15, 2026 •

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Add source-weighted helium core residence from supplied diffusion, convection, geometry and source profiles. Checked SOLVAX forward/backward solves support absorbing and finite-removal boundaries and JAX derivatives.

The README and runnable example specify the input contract. Trace-response fitting and finite-horizon trajectory estimates are included; recycling and pumping require separate models.

Tests cover independent continuum solutions, convergence, duality, gradients and invalid inputs. The exported-coefficient example regression passes; physical stellarator validation remains separate.

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rogeriojorge marked this pull request as ready for review October 19, 2026 20:46
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