MHD-stable QI stellarators: compactness versus simple coils

Find a Pareto set of MHD-stable quasi-isodynamic stellarator boundaries that trades compactness against coil simplicity.

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1	{
2	"domain": "engineering-energy",
3	"topics": [
4	"fusion-energy"
5	],
6	"type": "design",
7	"benchmark": {
8	"task": "Pareto set of MHD-stable QI stellarators: aspect ratio vs gradient scale length",
9	"metric": {
10	"name": "Hypervolume of feasible (−L∇B, A), reference (1, 20)",
11	"better": "higher"
12	},
13	"baseline": {
14	"name": "Best on the ConStellaration leaderboard (Wenyang Li)",
15	"score": 248.227515058408
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#L267",
22	"id": "mhd_stable",
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	}