{
  "abstract": "The Pfirsch-Schlüter current is a current that flows along the magnetic field lines in a toroidal plasma equilibrium that is required to make the plasma current density divergence free in the presence of a plasma-pressure gradient. A distortion in the plasma shape is caused by the Pfirsch-Schlüter current, and it is desirable to minimize both the strength and the distance this current flows along the magnetic field lines. The Pfirsch-Schlüter current is localized within a half period of a stellarator when $d\\ell/B$ integrated over the half period is the same for all lines in the magnetic surface. It is shown that within parts in a thousand this is the same condition as the distance $\\ell_{s}$ required for a field line to cross the half period being the same for all lines in the surface. To make the $\\ell_{s}$'s the same, the lines started on the small major radius side of the plasma must undergo wiggles to make their $\\ell_{s}$ as long as those started on the outboard side. This is generally achieved using modular coils with a large helical component on the small major radius side but could be achieved with a central column carrying a helical current.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.21637",
  "author_total": 1,
  "authors": [
    {
      "name": "Allen H Boozer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8rzy2sa08mpt0.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.21637",
  "fulltext_url": null,
  "id": "8rzy2sa08mpt0",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.21637",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "openalex",
      "3106|Magnetic confinement fusion research"
    ]
  ],
  "openalex": "W7162088717",
  "pdf_url": "https://arxiv.org/pdf/2605.21637",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8rzy2sa08mpt0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2605.21637",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.21637"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Pfirsch-Schlüter Current",
  "title_text": "Pfirsch-Schlüter Current",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/8rzy2sa08mpt0",
  "venue": "arXiv",
  "versions": []
}