{
  "abstract": "Near-omnigenous stellarators are susceptible to energetic particle (EP) losses due to resonances between trapped EPs and non-omnigenous perturbations to the magnetic field. Existing bounce-averaged objectives such as $Γ_c$, $Γ_δ$ , and $Γ_α$ target the non-resonant misalignment of drift and flux surfaces, but they do not capture resonant convective or diffusive motion. We develop a discrete map theory for the bounce points of trapped EPs in near-omnigenous fields, in which phase-space islands form due to resonance between the precession and bounce frequencies. We introduce $Δ_{res}$, a differentiable, bounce-averaged objective function that penalizes the widths of these islands, promoting phase-space integrability. Optimizing a quasi-axisymmetric configuration using $Δ_{res}$ combined with a two-term quasi-symmetry objective yields a factor-of-four improvement in EP confinement by displacing low-order resonances and forming EP transport barriers. $Δ_{res}$ is a powerful tool to combat both resonant convective and diffusive losses in power plant-relevant stellarators.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.01890",
  "author_total": 3,
  "authors": [
    {
      "name": "John Anthony Labbate"
    },
    {
      "name": "Elizabeth J. Paul"
    },
    {
      "name": "Amelia Chambliss"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4hg3p7rhxb48x.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.01890",
  "fulltext_url": null,
  "id": "4hg3p7rhxb48x",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.01890",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "openalex",
      "3106|Magnetic confinement fusion research"
    ]
  ],
  "openalex": "W7207743966",
  "pdf_url": "https://arxiv.org/pdf/2609.01890",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4hg3p7rhxb48x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2609.01890",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.01890"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "A novel objective function minimizes resonant trapped energetic particle losses in stellarators",
  "title_text": "A novel objective function minimizes resonant trapped energetic particle losses in stellarators",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/4hg3p7rhxb48x",
  "venue": "arXiv",
  "versions": []
}