News & updates
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- Rules update
Challenge 2 eligibility gate raised: DIII-D composite S_model ≥ 0.85
A participant pointed out (starter-kit issue #7) that the Challenge 2 ratio G_ratio = S_MAST / S_DIII-D could be inflated by deliberately weakening a DIII-D entry: the old R²ψ > 0.6 gate constrained only the flux term — 55% of the composite — so driving DIII-D down to the eligibility floor bought roughly a 3× ratio boost without breaking any rule. Effective today, only entries with a DIII-D composite S_model ≥ 0.85 are ranked on Challenge 2. The ratio itself stays, because Challenge 2 is about zero-shot transfer: do genuinely well on DIII-D, then retain that performance on MAST. The gate is now enforced in the scorer — an entry below it shows G_ratio = 0 in the Ch2 column, with the reason stated in its Detailed Results. Challenge 1 is unaffected. Entries already at or above the gate keep their scores exactly and need not resubmit; below-gate entries keep their displayed ratio until their next submission, but Award #2 will be decided under the new rule either way.
- Data erratum
DIII-D plasma-current timestamps — fix shipped in the starter kit
A participant found that magnetics_plasma_current_times carries the wrong time axis on ~69% of DIII-D shots, so resampling Ip onto efit_times there reads pre-shot noise instead of the real current. The targets, scoring, and fairness are unaffected — this is one input column, and everyone has the same data. A verified drop-in fix (data_fixes.py) now ships in the starter kit and the baseline applies it automatically; a corrected v1.1.1 dataset will follow and will match the fix exactly, so nothing you build now is throwaway. A small MAST Thomson channel-alignment fix ships alongside it.
- Now live
Training & public test data are live
The full 9,121-shot corpus (98 GB) is now on Hugging Face, opening Phase 1 (development). Every timeslice is a diverted plasma — limited frames were removed on both machines, so the boundary is always set by a magnetic X-point. Grab it from Resources, run a reference baseline, and make your first submission.
- Site
Challenge website is live
Browse the challenge motivation, dataset documentation, four reference baselines, the scoring breakdown, and the full timeline. Six sample shots ship in the starter kit for early exploration.