{
  "abstract": "The electrical conductivity $σ$ of the plasma filament left behind by an ultrashort pulsed laser (USPL) optical pulse after it is geometrically then self-focused in air via the Kerr effect is measured by attenuation of a 3.2 GHz TE$_{10}$ mode within an S-band waveguide through which the filament passes, taking into account the characteristic radius $R$ of the filament, as determined by fast camera visible light imaging. Models of the major air constituents' ionization rate $W_{i}$ vs. local laser intensity $I$, and of electron temperature $T$ and mean axial electron momentum $\\left\\langle p_{z}\\right\\rangle $ vs. peak laser intensity $I_{0}$ are then used to infer a hypothetical steady state filament's $I_{0}$, $T$, major species particle densities, and assumed axially invariant current time integral $Q$ and current decay rate $ν$ after pulse passage. $Q$ is independently measured via the filament's self-emission signal in the waveguide for comparison. The theoretical far field microwave radiation pattern due to the actual axial variation in $Q=Q\\left( z\\right) $ is compared favorably to published measurements. A much lower upper bound on $ν$ is inferred once such radiation is taken into account. Results are presented along a $30$~cm long filament at a broad range of atmospheric pressures.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.10852",
  "author_total": 7,
  "authors": [
    {
      "name": "Edward. L. Ruden"
    },
    {
      "name": "James. E. Wymer"
    },
    {
      "name": "Jennifer. A. Elle"
    },
    {
      "name": "Alex C. Englesbe"
    },
    {
      "name": "Andrian P. Lucero"
    },
    {
      "name": "Erin A. Thornton"
    },
    {
      "name": "Andreas Schmitt-Sody"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6zhpgk3ze1hc2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.10852",
  "fulltext_url": null,
  "id": "6zhpgk3ze1hc2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.10852",
  "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",
      "3107|Laser-Matter Interactions and Applications"
    ]
  ],
  "openalex": "W7168298145",
  "pdf_url": "https://arxiv.org/pdf/2607.10852",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6zhpgk3ze1hc2.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2607.10852",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.10852"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Ultrashort pulsed laser atmospheric filament properties and microwave radiation inferred from S-band guided wave interaction and self-emission",
  "title_text": "Ultrashort pulsed laser atmospheric filament properties and microwave radiation inferred from S-band guided wave interaction and self-emission",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/6zhpgk3ze1hc2",
  "venue": "arXiv",
  "versions": []
}