{
  "abstract": "Germanium charge-coupled devices (Ge-CCDs) extend CCD imaging beyond the silicon cutoff and are candidate detectors for the near-infrared channel of future astronomical instruments, in particular the spectrographs of next-generation wide-field surveys. We report the laboratory characterization at Brookhaven National Laboratory (BNL) of a prototype fabricated at MIT Lincoln Laboratory. We describe the cryogenic test system and readout, and present measurements of the output waveform, dark current, readout noise, and X-ray response. The dark current at 94.69 K is $26.12 \\pm 0.08$ e$^-$ pixel$^{-1}$ s$^{-1}$. Under $^{55}$Fe irradiation without on-chip binning, the charge generated by an X-ray is confined within $2\\times2$ pixels, and the Mn K$α$ line has a full width at half maximum (FWHM) of $8.5 \\pm 0.1$% for single-pixel events. Since the charge generated by X-rays above about 30 keV spreads over $3\\times3$ or more pixels, the CCD was operated with $2\\times2$ on-chip binning at higher energies. This yielded FWHMs of $8.4\\pm0.4$% at 30.9 keV ($^{133}$Ba, ASCA grades 0, 2, 3, 4, and 6) and $7.45\\pm0.04$% at 59.5 keV ($^{241}$Am, all grades). These results establish a baseline for the device and for the BNL test system. Measurements of the temperature dependence, optical response, and charge-transfer performance will connect this baseline to the requirements of near-infrared astronomical instruments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22785",
  "author_total": 9,
  "authors": [
    {
      "name": "Emi Tamura"
    },
    {
      "name": "Juan Cruz Estrada Vigil"
    },
    {
      "name": "Prashansa Mukim"
    },
    {
      "name": "Giovanni Pinaroli"
    },
    {
      "name": "Christopher Leitz"
    },
    {
      "name": "Ilya Prigozhin"
    },
    {
      "name": "Kevan Donlon"
    },
    {
      "name": "Santiago Ezequiel Perez"
    },
    {
      "name": "Sven C. Herrmann"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ftzawvd79eekb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22785",
  "fulltext_url": null,
  "id": "ftzawvd79eekb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22785",
  "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",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "openalex",
      "2208|CCD and CMOS Imaging Sensors"
    ]
  ],
  "openalex": "W7222947593",
  "pdf_url": "https://arxiv.org/pdf/2610.22785",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ftzawvd79eekb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.22785",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22785"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Laboratory Characterization of a Ge-CCD Prototype for Future Near-Infrared Astronomical Instrumentation",
  "title_text": "Laboratory Characterization of a Ge-CCD Prototype for Future Near-Infrared Astronomical Instrumentation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/ftzawvd79eekb",
  "venue": "arXiv",
  "versions": []
}