{
  "abstract": "Tungsten armor and liquid-metal films, the usual sacrificial first walls of laser-fusion chambers, were modeled separately. Both go through one calculation for the three HiPER scenarios: NRL 154 MJ spectra scaled by yield, binned to keep each ion species' number and energy, a common deposition model, and a one-dimensional enthalpy solver with melting, evaporation and parameterized vapor shielding. In Demo (154 MJ, 6.5 m, 10 Hz), a 1 mm tungsten armor peaks 378 K below melting without neutron heating (275-319 K with it). A degraded near-surface conductivity can erase this margin, which also depends on the ion-spectra construction. The steel interface exceeds the 925 K limit, and the surface accumulates the 10^18-10^19 m^-2 helium fluences associated with the onset of surface modification within 10-98 shots (not a lifetime). A lithium film keeps the steel below 925 K from 44 um and below the 873 K compatibility limit from 56 um, more with partial renewal. Burn ions then implant helium; keeping the steel below 10^18 m^-2 for 10^6 shots needs 184 um, which binds in every scenario. The film evaporates 7.4x10^-4 kg m^-2 per shot (range 4.2-8.4x10^-4 kg m^-2, full renewal). Vapor shielding, with a nearly un-ionized vapor (Saha estimate), changes this by -21 % to +5 % for the Saha-supported stopping factor s = 1 and -34 % to +8 % across s = 1-2. Both walls are thermally viable in Prototype and marginal for tungsten in Demo. The deciding issues are tungsten damage evolution, lithium film survival and chamber clearing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37047",
  "author_total": 1,
  "authors": [
    {
      "name": "Shohruxbek Bozorov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/et90v01se5rvp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37047",
  "fulltext_url": null,
  "id": "et90v01se5rvp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37047",
  "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",
      "2505|Fusion materials and technologies"
    ]
  ],
  "openalex": "W7224101592",
  "pdf_url": "https://arxiv.org/pdf/2610.37047",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/et90v01se5rvp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.37047",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37047"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Comparative analysis of tungsten armor and a liquid-lithium film as first walls for the HiPER laser-fusion chamber: thermal response, vapor shielding and helium transmission to the steel",
  "title_text": "Comparative analysis of tungsten armor and a liquid-lithium film as first walls for the HiPER laser-fusion chamber: thermal response, vapor shielding and helium transmission to the steel",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/et90v01se5rvp",
  "venue": "arXiv",
  "versions": []
}