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Least-elongated stellarator plasma boundary
Find the least elongated stellarator plasma boundary with aspect ratio at most 4, average triangularity at most −0.5 and edge iota per period at least 0.3.
| 1 | { |
| 2 | "domain": "engineering-energy", |
| 3 | "topics": [ |
| 4 | "fusion-energy" |
| 5 | ], |
| 6 | "type": "design", |
| 7 | "benchmark": { |
| 8 | "task": "Minimize the maximum elongation of a stellarator boundary within shape limits", |
| 9 | "metric": { |
| 10 | "name": "Score 1 − (max elongation − 1)/9; 0 if infeasible", |
| 11 | "better": "higher" |
| 12 | }, |
| 13 | "baseline": { |
| 14 | "name": "Best on the ConStellaration leaderboard (canyon-ant)", |
| 15 | "score": 0.980483470120651 |
| 16 | } |
| 17 | }, |
| 18 | "source": { |
| 19 | "key": "constellaration", |
| 20 | "name": "ConStellaration", |
| 21 | "url": "https://github.com/proximafusion/constellaration/blob/v0.2.6/src/constellaration/problems.py#L113", |
| 22 | "id": "geometrical", |
| 23 | "curator": "Proxima Fusion", |
| 24 | "poser": "Proxima Fusion (Cadena et al., 2025)", |
| 25 | "status": "open", |
| 26 | "as_of": "2026-10-20", |
| 27 | "catalog": "0521c19bbd38" |
| 28 | }, |
| 29 | "review": true, |
| 30 | "approval": "first-time" |
| 31 | } |