Pith Number

pith:R663LPU3

pith:2026:R663LPU3YWMTWQEZGCJP2ZYBY6

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Near-axis quasi-isodynamic database

Eduardo Rodriguez, Gabriel G. Plunk

A database of over 800,000 stable approximately quasi-isodynamic stellarator configurations has been constructed using the near-axis expansion.

arxiv:2601.08400 v3 · 2026-01-13 · physics.plasm-ph

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Claims

C1strongest claim

Building on recent theoretical developments, we construct a database of more than 800,000 stable, approximately quasi-isodynamic vacuum magnetic configurations. These configurations span a range of field period numbers and other geometric control parameters, including the magnetic axis shape and plasma elongation.

C2weakest assumption

The near-axis expansion combined with the chosen evaluation metrics (effective ripple, Shafranov shift sensitivity, maximum-J prevalence, Rosenbluth-Hinton residual) sufficiently identifies truly quasi-isodynamic and stable configurations across the explored parameter space.

C3one line summary

A database of more than 800,000 stable approximately quasi-isodynamic vacuum magnetic configurations is constructed and statistically analyzed using near-axis expansion.

Formal links

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Cited by

1 paper in Pith

Exploring the link between coil non-planarity and magnetic surface geometry across a dataset of QI stellarators

Receipt and verification

First computed	2026-06-01T01:03:48.429790Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8fbdb5be9bc5993b40993092fd6701c78659a6c56d0e625d22330b8ccd981e38

Aliases

arxiv: 2601.08400 · arxiv_version: 2601.08400v3 · doi: 10.48550/arxiv.2601.08400 · pith_short_12: R663LPU3YWMT · pith_short_16: R663LPU3YWMTWQEZ · pith_short_8: R663LPU3

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/R663LPU3YWMTWQEZGCJP2ZYBY6 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8fbdb5be9bc5993b40993092fd6701c78659a6c56d0e625d22330b8ccd981e38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55b1f149a41f147dc95dedc30ee59d450044b17b9d8bd9ddbf2c0e8950ac19e2",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2026-01-13T10:15:40Z",
    "title_canon_sha256": "7c18f7112f8cec885adab74793906d60fbb034810915f71ce3ba8f6c424b6d26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.08400",
    "kind": "arxiv",
    "version": 3
  }
}