{
  "annotation_id": "44d9fcc9-db47-4e7a-b42e-463b4ef6c32f",
  "date_created": "2026-03-02T18:01:18.444000Z",
  "date_modified": "2026-03-02T18:01:18.444000Z",
  "file_hash": "4bea8661b0c566543a4b9cb85a575eb64c4a8f10ceee67911896dc077bb1c6a2",
  "private": false,
  "record": {
    "abstract": "We describe a UV photo-detector with single photon(electron) counting and\nimaging capability. It is based on a CsI photocathode, a GEM charge multiplier\nand a self triggering CMOS analog pixel chip with 105k pixels at 50 micron\npitch. The single photoelectron produced by the absorption of a UV photon is\ndrifted to and multiplied inside a single GEM hole. The coordinates of the GEM\navalanche are reconstructed with high accuracy (4 micron rms) by the pixel\nchip. As a result the map of the GEM holes, arranged on a triangular pattern at\n50micron pitch, is finely imaged.",
    "arxiv_id": "physics/0703176",
    "authors": [
      "R. Bellazzini",
      "G. Spandre",
      "A. Brez",
      "M. Minuti",
      "L. Baldini",
      "L. Latronico",
      "M. M. Massai",
      "N. Omodei",
      "M. Pesce-Rollins",
      "C Sgr\u00f3",
      "M. Razzano",
      "M. Pinchera",
      "J. Bregeon",
      "M. Kuss",
      "A. Braem"
    ],
    "categories": [
      "physics.ins-det",
      "astro-ph",
      "physics.med-ph"
    ],
    "doi": "10.1016/j.nima.2007.07.098 10.1016/j.nima.2007.11.002",
    "journal_ref": "Nucl.Instrum.Meth.A581:246-253,2007; Erratum-ibid.A585:105,2008",
    "title": "Imaging with the invisible light",
    "url": "https://arxiv.org/abs/physics/0703176"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3f609e26-112a-4e70-9617-fc2c3131a6a7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}