{"paper":{"title":"Stellarators close to quasisymmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Felix I. Parra, Ivan Calvo, J. Arturo Alonso, J. L. Velasco","submitted_at":"2013-07-12T10:01:47Z","abstract_excerpt":"Rotation is favorable for confinement, but a stellarator can rotate at high speeds if and only if it is sufficiently close to quasisymmetry. This article investigates how close it needs to be. For a magnetic field $\\mathbf{B} = \\mathbf{B}_0 + \\alpha \\mathbf{B}_1$, where $\\mathbf{B}_0$ is quasisymmetric, $\\alpha\\mathbf{B}_1$ is a deviation from quasisymmetry, and $\\alpha\\ll 1$, the stellarator can rotate at high velocities if $\\alpha < \\epsilon^{1/2}$, with $\\epsilon$ the ion Larmor radius over the characteristic variation length of $\\mathbf{B}_0$. The cases in which this result may break down "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3393","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}