{"paper":{"title":"Near-axis quasi-isodynamic database","license":"http://creativecommons.org/licenses/by/4.0/","headline":"A database of over 800,000 stable approximately quasi-isodynamic stellarator configurations has been constructed using the near-axis expansion.","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Eduardo Rodriguez, Gabriel G. Plunk","submitted_at":"2026-01-13T10:15:40Z","abstract_excerpt":"In this work, we investigate the landscape of quasi-isodynamic stellarators using the near-axis expansion of the magnetic field. 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. To evaluate each configuration, we use a broad set of measures, including effective ripple, sensitivity of the Shafranov shift to changes in plasma beta, t"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"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.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"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.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A database of more than 800,000 stable approximately quasi-isodynamic vacuum magnetic configurations is constructed and statistically analyzed using near-axis expansion.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A database of over 800,000 stable approximately quasi-isodynamic stellarator configurations has been constructed using the near-axis expansion.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6c77dcd88109548e4a434ed95100bbc9237f48a14ffcd047cca24d3c28a0217f"},"source":{"id":"2601.08400","kind":"arxiv","version":3},"verdict":{"id":"a79b38f2-e45d-49ce-8ffa-54afdbf1d7dd","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T14:56:28.996355Z","strongest_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.","one_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.","pipeline_version":"pith-pipeline@v0.9.0","weakest_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.","pith_extraction_headline":"A database of over 800,000 stable approximately quasi-isodynamic stellarator configurations has been constructed using the near-axis expansion."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2601.08400/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"a3aaf0f6d070f9385f0cae0643916f3cf163d76e475b7cf272b187264f6c087b"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}