{
  "annotation_id": "244116f7-8048-4f74-81b9-3d497383d3ea",
  "date_created": "2026-03-02T18:01:24.595000Z",
  "date_modified": "2026-03-02T18:01:24.595000Z",
  "file_hash": "a55d9e376bcaf0e9448c5580e520bd62dae489d4d84dafd0aa08fa1de7696760",
  "private": false,
  "record": {
    "abstract": "Non destructive quality control of microstructures at the manufacturing stage\nis an important issue in the foreseen use of huge numbers of such gaseous\ndetectors in the future high luminosity colliders. In this work we report on\nthe use of the scintillation light emitted by the avalanches in GEM channels\nfor checking defects in the foils. The test system is described and data on the\nrelative efficiency of several gaseous mixtures are presented. The foil images\nobtained with a low-noise CCD system are analysed and compared with the optical\nimages obtained with an industrial inspection system of high magnification. The\nvalidity of this test method is established and possible extensions of its use\nare discussed.",
    "arxiv_id": "physics/9907023",
    "authors": [
      "F. A. F. Fraga",
      "S. T. G. Fetal",
      "R. Ferreira Marques",
      "A. J. P. L. Policarpo"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1016/S0168-9002(99)01266-8",
    "journal_ref": "Nucl.Instrum.Meth. A442 (2000) 417-422",
    "title": "Quality control of GEM detectors using scintillation techniques",
    "url": "https://arxiv.org/abs/physics/9907023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "abfe2286-83f7-43cf-a441-d3e204448cbe",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}