{
  "abstract": "Magnetic equilibrium reconstruction provides the plasma state estimate required for real-time shape control in tokamaks. We present a fast, physics-informed neural network surrogate of the \\texttt{liuqe} equilibrium reconstruction code \\cite{liuqe1} for the TCV tokamak at EPFL, achieving inference times below 100~$\\bmμ$s and enabling 10~kHz shape control. The model is trained on around 10,000 TCV discharges spanning the full operational range of plasma shapes. Its modular branch/trunk architecture decouples magnetic measurement encoding from spatial coordinate processing, enabling physics-informed regularization via automatic differentiation of the predicted flux map. The surrogate has been compiled and deployed on the TCV real-time control system, and validated both offline and in real time against the models \\texttt{liuqe-rt} and \\texttt{lih}, showing comparable accuracy. Closed-loop performance assessed with the real-time software in-the-loop \\texttt{fge} \\cite{fge1} demonstrates control-equivalent behavior across multiple control strategies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.09487",
  "author_total": 8,
  "authors": [
    {
      "name": "M. Grandin"
    },
    {
      "name": "A. Mele"
    },
    {
      "name": "C. Galperti"
    },
    {
      "name": "D. Gonzales Castineiras"
    },
    {
      "name": "C. Heiß"
    },
    {
      "name": "A. Cenedese"
    },
    {
      "name": "TCV team"
    },
    {
      "name": "EUROfusion Tokamak Exploitation team"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/270z1d75dxkqm.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.09487",
  "fulltext_url": null,
  "id": "270z1d75dxkqm",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.09487",
  "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": "W7164032788",
  "pdf_url": "https://arxiv.org/pdf/2606.09487",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/270z1d75dxkqm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2606.09487",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.09487"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Experimental validation of a fast control-oriented, physics-informed surrogate model for plasma equilibrium reconstruction in the TCV tokamak",
  "title_text": "Experimental validation of a fast control-oriented, physics-informed surrogate model for plasma equilibrium reconstruction in the TCV tokamak",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/270z1d75dxkqm",
  "venue": "arXiv",
  "versions": []
}