{
  "abstract": "We are developing an experimental platform at Lawrence Livermore National Laboratory's Jupiter Laser Facility to characterize X-ray emission from highly charged ions in the high-density ($n_e > 10^{23}$ cm$^{-3}$), high-temperature ($T_e \\sim 1$ keV) regime, leveraging the recently upgraded frequency-doubled short-pulse Titan laser. These measurements will provide experimental benchmarks for high electron density effects on atomic structure, including Stark broadening, ionization potential depression, density-dependent line shifts, and suppression of dielectronic recombination, effects that are relevant to spectral modeling packages used by both the high-energy-density and astrophysics communities. Here, we describe the current status of the platform and present results from first experiments using the upgraded frequency-doubling capability, including calibrated K-shell spectra acquired from five time-integrated X-ray channels. Comparisons with MERL line shape calculations and with spectra recorded at AWE's Orion Laser Facility indicate that the upgraded Titan laser reliably produces the necessary plasma conditions, establishing a foundation for systematic benchmarking of high-density atomic physics in future campaigns.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Rev. Sci. Instrum. 1 October 2026; 97 (10): 103506",
  "arxiv": "2610.03552",
  "author_total": 13,
  "authors": [
    {
      "name": "A. J. Fairchild"
    },
    {
      "name": "D. T. Bishel"
    },
    {
      "name": "T. Cordova"
    },
    {
      "name": "H. Flores-Alimboyoguen"
    },
    {
      "name": "M. F. Gu"
    },
    {
      "name": "P. Hamilton"
    },
    {
      "name": "N. Hell"
    },
    {
      "name": "M. J. MacDonald"
    },
    {
      "name": "E. W. Magee"
    },
    {
      "name": "R. C. Mancini"
    },
    {
      "name": "E. V. Marley"
    },
    {
      "name": "R. Shepherd"
    },
    {
      "name": "G. V. Brown"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b9fttet4gy00h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03552",
  "fulltext_url": null,
  "id": "b9fttet4gy00h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03552",
  "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.atom-ph"
    ],
    [
      "arxiv",
      "physics.plasm-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.03552",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b9fttet4gy00h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2610.03552",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03552"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2$ω$ short-pulse laser",
  "title_text": "X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2ω short-pulse laser",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/b9fttet4gy00h",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1063/5.0350551",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}