{
  "annotation_id": "c88c8a7f-3eb4-4098-99af-eb6c20863ff6",
  "date_created": "2026-03-02T18:00:39.868000Z",
  "date_modified": "2026-03-02T18:00:39.868000Z",
  "file_hash": "41dd653bd8cd962f714225e1aec4baa5af7501cd89bfff7259e0f12be636c2ed",
  "private": false,
  "record": {
    "abstract": "A photon detector for BNL experiment E949 is described. The detector consists\nof lead/scintillator ``sandwich\u0027\u0027 of 25 layers of 5 mm thick scintillator BC404\nand 24 layers of 2 mm lead absorber. Readout is implemented with 30-60 cm long\nWLS fibers (BCF99-29AA) glued into grooves in the BC404. Average yield was\nmeasured with cosmic rays to be about 43 p.e./MeV. Extruded plastic\nscintillation counters developed for sandwich detectors of photons for the\nKOPIO experiment are also described. For a 7 mm thick counter with 4.3 m long\nWLS fibers spaced at 7 mm a light yield of 18.7 p.e./MeV and time resolution of\n0.71 ns were obtained. A prototype photon veto module consisting of 10 layers\nof 7 mm thick extruded plastic slabs interleaved with 1 mm lead sheets was\ntested.",
    "arxiv_id": "physics/0207033",
    "authors": [
      "O. Mineev",
      "E. Garber",
      "J. Frank",
      "A. Ivashkin",
      "S. Kettell",
      "M. Khabibullin",
      "Yu. Kudenko",
      "K. Li",
      "L. Littenberg",
      "V. Mayatski",
      "N. Yershov"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1016/S0168-9002(02)01493-6",
    "journal_ref": "Nucl.Instrum.Meth.A494:362-368,2002",
    "title": "Photon sandwich detectors with WLS fiber readout",
    "url": "https://arxiv.org/abs/physics/0207033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5173b5cc-09e9-4f08-8bd0-22652e3474c8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}