{
  "annotation_id": "000de306-08f5-4e9d-9995-ac3f3d818906",
  "date_created": "2026-03-02T18:01:00.641000Z",
  "date_modified": "2026-03-02T18:01:00.641000Z",
  "file_hash": "4000e97e0807ab03f7007d91123424c9b22cf0b3f4f1ec56dad4a2b31cb4938e",
  "private": false,
  "record": {
    "abstract": "A prototype Secondary-electron Emission Monitor (SEM) was installed in the 8\nGeV proton transport line for the MiniBooNE experiment at Fermilab. The SEM is\na segmented grid made with 5 um Ti foils, intended for use in the 120 GeV NuMI\nbeam at Fermilab. Similar to previous workers, we found that the full\ncollection of the secondary electron signal requires a bias voltage to draw the\nejected electrons cleanly off the foils, and this effect is more pronounced at\nlarger beam intensity. The beam centroid and width resolutions of the SEM were\nmeasured at beam widths of 3, 7, and 8 mm, and compared to calculations.\nExtrapolating the data from this beam test, we expect a centroid and width\nresolutions of 20um and 25 um, respectively, in the NuMI beam which has 1 mm\nspot size.",
    "arxiv_id": "physics/0507211",
    "authors": [
      "S. Kopp",
      "D. Indurthy",
      "Z. Pavlovich",
      "M. Proga",
      "R. Zwaska",
      "S. Childress",
      "R. Ford",
      "C. Kendziora",
      "T. Kobilarcik",
      "C. Moore",
      "G. Tassotto"
    ],
    "categories": [
      "physics.ins-det",
      "hep-ex",
      "physics.acc-ph"
    ],
    "doi": "10.1016/j.nima.2005.08.076",
    "journal_ref": "Nucl.Instrum.Meth.A554:138-146,2005",
    "title": "Beam Test of a Segmented Foil SEM Grid",
    "url": "https://arxiv.org/abs/physics/0507211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2b543c9f-aaaf-4c8f-8004-deb40167db2a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}