{
  "abstract": "The edge radial electric ($E_r$) in the Tokamak à Configuration Variable (TCV) is compared in matched L-mode discharges with opposite ion magnetic drift directions (favorable versus unfavorable $B \\! \\times \\! \\nabla B$ configurations). As previously reported on the WEST and AUG tokamaks, the $E_r$ profile---measured by Doppler backscattering (DBS)---exhibits a \"well\" just inside the separatrix in the favorable drift case, which is absent or less pronounced in the unfavorable counterpart. This observation holds over a broad range of plasma conditions, notably also in Ohmic discharges with nearly identical edge density and temperature profiles. Density fluctuation characteristics inferred from DBS are not drastically different: Under Ohmic heating, edge fluctuation levels tend to be higher in the favorable configuration, while radial correlation lengths are similar. The edge $E_r$ difference appears uncorrelated with carbon toroidal rotation behavior. Reducing density, or increasing auxiliary heating power tends to accentuate the edge $E_r$ disparity. Plasma current has little impact on both favorable and unfavorable $E_r$ profiles---in contrast to results from WEST. Approaching the L-H transition via auxiliary heating, edge $E_r \\times B$ shear and pressure grow more readily in the favorable configuration, and DBS fluctuation levels are reduced relative to the unfavorable case. Overall, our results confirm that the edge $E_r$ sensitivity to magnetic drift configuration is a robust, multi-machine phenomenon, with a plausible connection to confinement level and H-mode access.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.31424",
  "author_total": 11,
  "authors": [
    {
      "name": "S. Rienäcker"
    },
    {
      "name": "L. Vermare"
    },
    {
      "name": "P. Hennequin"
    },
    {
      "name": "C. Honoré"
    },
    {
      "name": "B. Labit"
    },
    {
      "name": "S. Coda"
    },
    {
      "name": "L. Frassinetti"
    },
    {
      "name": "B. Vincent"
    },
    {
      "name": "O. Panico"
    },
    {
      "name": "Y. Wang"
    },
    {
      "name": "K. Singh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0xtqeqgj76vrw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.31424",
  "fulltext_url": null,
  "id": "0xtqeqgj76vrw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.31424",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "openalex",
      "3106|Magnetic confinement fusion research"
    ]
  ],
  "openalex": "W7214645871",
  "pdf_url": "https://arxiv.org/pdf/2609.31424",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0xtqeqgj76vrw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:52Z",
      "native_id": "2609.31424",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.31424"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Impact of magnetic drift configuration on the edge radial electric field in the TCV tokamak",
  "title_text": "Impact of magnetic drift configuration on the edge radial electric field in the TCV tokamak",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:52Z",
  "url": "https://research.draconitic.com/paper/0xtqeqgj76vrw",
  "venue": "arXiv",
  "versions": []
}