{
  "abstract": "During plasma heating and current ramps the thermal and magnetic states of a tokamak evolve on different timescales. We present a rapid integrated tokamak modelling approach, which couples a variational fixed-boundary Grad--Shafranov equilibrium to sparse particle and energy flux matching and to weak-form current diffusion. An ITER-like pure-deuterium scenario is examined: a current ramp from 10 to 15~MA over 20~s, a 20~s flat-top and a 20~s ramp-down to 14~MA, under 80~MW of electron-cyclotron heating applied at the start. The toroidal current density at the pedestal top more than doubles during the ramp-up and then decreases during the flat-top as current redistributes inward. Thermal stored energy rises from 185.52 to 252.70~MJ and approaches its final value within the first few seconds. An independent calculation with the Fusion Synthesis Engine (FUSE) gives a stored-energy difference of 0.02\\% at 60~s, whereas the largest profile differences occur in the core current density. Halving the coupling interval changes stored energy by at most 0.006\\% at the selected radial resolution. The 60~s pulse, advanced through 600 coupling intervals of 0.1~s, takes 8.62~s on an Apple M4 Pro, which is at least two orders of magnitude faster than conventional integrated tokamak modelling solvers.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.33500",
  "author_total": 4,
  "authors": [
    {
      "name": "Ruohan Zhang"
    },
    {
      "name": "Huasheng Xie"
    },
    {
      "name": "Feng Wang"
    },
    {
      "name": "Zheng-Xiong Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7keyp9p13vz0q.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.33500",
  "fulltext_url": null,
  "id": "7keyp9p13vz0q",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.33500",
  "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": "W7214705741",
  "pdf_url": "https://arxiv.org/pdf/2609.33500",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7keyp9p13vz0q.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.33500",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.33500"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "A Rapid Integrated Tokamak Modelling Approach for Coupled Profile and Equilibrium Evolution",
  "title_text": "A Rapid Integrated Tokamak Modelling Approach for Coupled Profile and Equilibrium Evolution",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/7keyp9p13vz0q",
  "venue": "arXiv",
  "versions": []
}