{
  "abstract": "The TRIUMF UltraCold Advanced Neutron (TUCAN) collaboration has completed a new superthermal source for ultracold neutrons (UCNs) at TRIUMF. Neutrons produced in a spallation target are moderated in heavy water and liquid deuterium, and are converted to ultracold neutrons by inelastic scattering inside superfluid $^4$He at around 1.1 K. During commissioning of the completed moderation and conversion system, including the liquid-deuterium moderator, up to $1.47(2)\\times 10^7$ UCNs were detected outside the source in the experimental area following a 60 s accumulation period. At the same location, continuous operation produced detector rates of up to $6.75(3)\\times 10^7$ UCN/s, and a density of 165.6(1) UCN/cm$^3$ was achieved in a 25.4 L external vessel. These measurements demonstrate high-intensity operation of a spallation-driven He-II UCN source, including extraction and transport to an external experimental area.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.03033",
  "author_total": 81,
  "authors": [
    {
      "name": "K. Abe"
    },
    {
      "name": "S. Ahmed"
    },
    {
      "name": "B. Algohi"
    },
    {
      "name": "D. Anthony"
    },
    {
      "name": "L. Barron-Palos"
    },
    {
      "name": "Y. Bylinsky"
    },
    {
      "name": "M. Bosse"
    },
    {
      "name": "M. P. Bradley"
    },
    {
      "name": "A. Brossard"
    },
    {
      "name": "J. Chak"
    },
    {
      "name": "R. Chiba"
    },
    {
      "name": "C. Davis"
    },
    {
      "name": "R. de Vries"
    },
    {
      "name": "K. Dong"
    },
    {
      "name": "K. Drury"
    },
    {
      "name": "B. Franke"
    },
    {
      "name": "D. Fujimoto"
    },
    {
      "name": "R. Fujitani"
    },
    {
      "name": "M. Gericke"
    },
    {
      "name": "P. Giampa"
    },
    {
      "name": "C. Gibson"
    },
    {
      "name": "R. Golub"
    },
    {
      "name": "K. Hatanaka"
    },
    {
      "name": "T. Hepworth"
    },
    {
      "name": "T. Higuchi"
    },
    {
      "name": "A. Jaison"
    },
    {
      "name": "B. Jamieson"
    },
    {
      "name": "K. Jorgensen-Fullam"
    },
    {
      "name": "M. Katotoka"
    },
    {
      "name": "S. Kawasaki"
    },
    {
      "name": "M. Kitaguchi"
    },
    {
      "name": "W. Klassen"
    },
    {
      "name": "E. Klemets"
    },
    {
      "name": "E. Korkmaz"
    },
    {
      "name": "E. Korobkina"
    },
    {
      "name": "F. Kuchler"
    },
    {
      "name": "C. Lamb"
    },
    {
      "name": "M. Lavvaf"
    },
    {
      "name": "A. Lejuez"
    },
    {
      "name": "T. Lightbody"
    },
    {
      "name": "T. Lindner"
    },
    {
      "name": "S. Longo"
    },
    {
      "name": "K. W. Madison"
    },
    {
      "name": "J. Malcolm"
    },
    {
      "name": "J. Mammei"
    },
    {
      "name": "R. Mammei"
    },
    {
      "name": "C. Marshall"
    },
    {
      "name": "J. W. Martin"
    },
    {
      "name": "R. Matsumiya"
    },
    {
      "name": "M. McCrea"
    },
    {
      "name": "E. Miller"
    },
    {
      "name": "M. Miller"
    },
    {
      "name": "K. Mishima"
    },
    {
      "name": "T. Mohammadi"
    },
    {
      "name": "T. Momose"
    },
    {
      "name": "M. Nalbandian"
    },
    {
      "name": "T. Okamura"
    },
    {
      "name": "S. Pankratz"
    },
    {
      "name": "R. Patni"
    },
    {
      "name": "R. Picker"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dk3yerdk296em.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.03033",
  "fulltext_url": null,
  "id": "dk3yerdk296em",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.03033",
  "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",
      "nucl-ex"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ],
    [
      "openalex",
      "3107|Atomic and Subatomic Physics Research"
    ]
  ],
  "openalex": "W7167624127",
  "pdf_url": "https://arxiv.org/pdf/2607.03033",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dk3yerdk296em.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2607.03033",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.03033"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "A New High-Intensity Source for Ultracold Neutrons",
  "title_text": "A New High-Intensity Source for Ultracold Neutrons",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/dk3yerdk296em",
  "venue": "arXiv",
  "versions": []
}