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    "story_id": "mp-2026-07-29-004",
    "source_story_id": "tmp-story-protodune-vertical-drift-stress-test",
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    "headline": "The Neutrino Detector Took the Hard Test First",
    "slug": "the-neutrino-detector-took-the-hard-test-first",
    "dek": "CERN's ProtoDUNE vertical-drift apparatus was deliberately pushed through demanding operating conditions before DUNE construction.",
    "summary": "CERN's ProtoDUNE vertical-drift apparatus was deliberately pushed through demanding operating conditions before DUNE construction.",
    "body_text": "The international DUNE collaboration subjected a full-scale vertical-drift prototype at CERN to an extreme stress test meant to expose failure modes before similar components are installed deep underground in South Dakota. Because submerged detector hardware will be inaccessible for decades, the commissioning exercise emphasizes endurance and recoverability rather than a physics discovery. Its success is a prototype milestone; the far detector still faces construction and long-term operating risk.",
    "why_it_matters": "CERN's ProtoDUNE vertical-drift apparatus was deliberately pushed through demanding operating conditions before DUNE construction.",
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    "importance": 8,
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    "first_published_at": "2026-07-29T09:00:00.000-04:00",
    "modified_at": "2026-07-29T09:00:00.000-04:00",
    "content_status": "new",
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    "carryover_reason": null,
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        "claim_id": "claim-mp-2026-07-29-004-001",
        "text": "CERN's ProtoDUNE vertical-drift apparatus was deliberately pushed through demanding operating conditions before DUNE construction.",
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        "qualification": null
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    "source_ids": [
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    "tags": [
      "DUNE",
      "neutrinos",
      "ProtoDUNE",
      "detector engineering"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-07-29-004",
      "title": "Fermilab via Newswise: ProtoDUNE vertical-drift stress test",
      "publisher": "Fermilab via Newswise",
      "url": "https://www.newswise.com/articles/new-dune-technology-put-to-the-ultimate-stress-test",
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      "published_at": null,
      "accessed_at": "2026-07-29T08:25:00.000-04:00",
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  "corrections": [],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "The Neutrino Detector Took the Hard Test First",
    "publisher": "The Machine Press",
    "published_at": "2026-07-29T09:00:00.000-04:00",
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