{"paper":{"title":"High-throughput full-f gyrokinetics of the tokamak boundary","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"Hundreds of full-f gyrokinetic simulations show plasma shaping impacts on tokamak boundary confinement are strongly power dependent.","cross_cats":["nlin.CD","physics.comp-ph","physics.data-an"],"primary_cat":"physics.plasm-ph","authors_text":"A.C.D. Hoffmann, A. Hakim, G.W. Hammett, M. Francisquez, T.N. Bernard","submitted_at":"2026-05-01T21:40:16Z","abstract_excerpt":"Full-f global gyrokinetic simulations of the plasma boundary have until now required heroic computational efforts and case-by-case expert intervention, precluding systematic parameter scans. Here we demonstrate a paradigm shift: hundreds of independent, concurrent, and unsupervised full-f boundary gyrokinetic simulations in a geometry inspired by the Tokamak \\`a Configuration Variable (TCV), covering both the closed flux surface region and the open-field-line scrape-off layer (SOL) while scanning triangularity, elongation, and heating power. All simulations are evolved much longer than the tur"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Analysis of the steady-state profiles reveals that the impact of plasma shaping on confinement is strongly power dependent: at low power, triangularity primarily controls the SOL ion temperature, while at high power it mostly affects the edge ion temperature gradient. The low-power hot SOL observed for positive triangularity is explained by a neoclassical trapped-ion mechanism.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The simulations have all reached true steady state after evolving much longer than the turbulence relaxation time, and that the observed power-dependent shaping effects are not artifacts of the specific TCV-inspired geometry or the chosen numerical resolution and boundary conditions.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Hundreds of concurrent full-f gyrokinetic simulations demonstrate power-dependent impacts of plasma shaping on tokamak boundary confinement and release open data for model benchmarking.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Hundreds of full-f gyrokinetic simulations show plasma shaping impacts on tokamak boundary confinement are strongly power dependent.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"d0c6fef9b27723a81de830ec778c5aeba5a80569e3e58cf3a7da2576a4f6c869"},"source":{"id":"2605.01117","kind":"arxiv","version":2},"verdict":{"id":"b569e6de-1bd8-4e1c-a247-d9655641f508","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T18:02:13.178512Z","strongest_claim":"Analysis of the steady-state profiles reveals that the impact of plasma shaping on confinement is strongly power dependent: at low power, triangularity primarily controls the SOL ion temperature, while at high power it mostly affects the edge ion temperature gradient. The low-power hot SOL observed for positive triangularity is explained by a neoclassical trapped-ion mechanism.","one_line_summary":"Hundreds of concurrent full-f gyrokinetic simulations demonstrate power-dependent impacts of plasma shaping on tokamak boundary confinement and release open data for model benchmarking.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The simulations have all reached true steady state after evolving much longer than the turbulence relaxation time, and that the observed power-dependent shaping effects are not artifacts of the specific TCV-inspired geometry or the chosen numerical resolution and boundary conditions.","pith_extraction_headline":"Hundreds of full-f gyrokinetic simulations show plasma shaping impacts on tokamak boundary confinement are strongly power dependent."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.01117/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_compliance","ran_at":"2026-05-19T17:33:05.767687Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"fe2d43fc30e79df6ad980bff40e5f0097ed7cbeb05be0ebe6543da8e6fdec9e4"},"references":{"count":73,"sample":[{"doi":"","year":null,"title":"to provide a more robust setup for the large number of simulations of the scan, which is not tweaked case by case. In the following section, we verify that each simulation reaches a statistical steady","work_id":"b9a148e8-edb4-4762-bf44-8ccc78776da6","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"A. J. Creely, M. J. Greenwald, S. B. Ballinger, D. Brun- ner, J. Canik, J. Doody, T. Fülöp, D. T. Garnier, R. Granetz, T. K. Gray, C. Holland, N. T. Howard, 9 J. W. Hughes, J. H. Irby, V. A. Izzo, G. ","work_id":"18aa89f5-4677-43a2-a71e-e6dde3399e7c","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2025,"title":"C. Hegna, D. Anderson, E. Andrew, A. Ayilaran, A. Bader, T. Bohm, K. C. Mata, J. Canik, L. Carba- jal, A. Cerfon, and et al., Journal of Plasma Physics91, E76 (2025)","work_id":"e8599a53-35cf-4ef2-9e5a-08da78d8ae5f","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2025,"title":"J. Lion, J.-C. Anglès, L. Bonauer, A. Bañón Navarro, S. Cadena Ceron, R. Davies, M. Drevlak, N. Foppiani, J. Geiger, A. Goodman, W. Guo, E. Guiraud, F. Hernán- dez, S. Henneberg, R. Herrero, C. Hintze","work_id":"971c543b-bc4c-42ee-89a0-6b85e0ddd8e5","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2026,"title":"C. Swanson, S. Kumar, D. Duda, E. Flom, W. Kalb, T. Kruger, M. Martin, J. Olatunji,et al., Overview of the Helios design: A practical planar coil stellarator fu- sion power plant (n.d.), white paper (","work_id":"c3cdffe6-5bcf-4a6e-a115-d4ae82dd39c3","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":73,"snapshot_sha256":"d4e307f5c99111279e07dfa6c1b27c584277a13390a25fd7c89a82215c2034cd","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"55e7daf7cd8f0ab2319f6fdd6f636c0f10404ef0656e955ee3394a683ee7d4af"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}