{
  "abstract": "We investigate the nonlinear coalescence of two current-carrying ELM filaments using a three-dimensional electromagnetic fluid model. In the flat-density limit, the coalescence exhibits magnetic island-like reconnection, characterized by X-point formation, current-sheet development, and Sweet-Parker-like resistive scaling. Introducing a blob-like density perturbation modifies the reconnection dynamics: while the peak reconnection rate remains nearly unchanged for weak perturbations, it decreases and is increasingly delayed for larger density amplitudes. Analysis of the induction equation reveals a transition from resistive to increasingly density-dependent advective dynamics. Finite density perturbations also enhance the post-compression rebound, or sloshing, of the filaments. The sloshing amplitude increases with the density-gradient pressure force, establishing density perturbation as an additional control parameter for both reconnection and filament sloshing. These results highlight the coupled electromagnetic and pressure-driven dynamics governing the nonlinear evolution of ELM filaments in the tokamak edge.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.07104",
  "author_total": 4,
  "authors": [
    {
      "name": "Souvik Mondal"
    },
    {
      "name": "N Bisai"
    },
    {
      "name": "Abhijit Sen"
    },
    {
      "name": "Indranil Bandyopadhyay"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/65pfq5vcwj5eh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.07104",
  "fulltext_url": null,
  "id": "65pfq5vcwj5eh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.07104",
  "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": "W7212034090",
  "pdf_url": "https://arxiv.org/pdf/2609.07104",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/65pfq5vcwj5eh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.07104",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.07104"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Electromagnetic filament coalescence as magnetic island merging with diamagnetic effects",
  "title_text": "Electromagnetic filament coalescence as magnetic island merging with diamagnetic effects",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/65pfq5vcwj5eh",
  "venue": "arXiv",
  "versions": []
}