{
  "annotation_id": "5186994c-9590-4105-bce8-0e027dad5831",
  "date_created": "2026-03-02T18:01:17.964000Z",
  "date_modified": "2026-03-02T18:01:17.964000Z",
  "file_hash": "4ba78b92a4143d789678a362c015416ddb3d0f9b53428d24f651993bfadf3d7d",
  "private": false,
  "record": {
    "abstract": "One of the three X-ray detectors of the CAST experiment searching for solar\naxions is a Time Projection Chamber (TPC) with a multi-wire proportional\ncounter (MWPC) as a readout structure. Its design has been optimized to provide\nhigh sensitivity to the detection of the low intensity X-ray signal expected in\nthe CAST experiment. A low hardware threshold of 0.8 keV is safely set during\nnormal data taking periods, and the overall efficiency for the detection of\nphotons coming from conversion of solar axions is 62 %. Shielding has been\ninstalled around the detector, lowering the background level to 4.10 x 10^-5\ncounts/cm^2/s/keV between 1 and 10 keV. During phase I of the CAST experiment\nthe TPC has provided robust and stable operation, thus contributing with a\ncompetitive result to the overall CAST limit on axion-photon coupling and mass.",
    "arxiv_id": "physics/0702189",
    "authors": [
      "D. Autiero",
      "B. Beltran",
      "J. M. Carmona",
      "S. C\u00e9brian",
      "E. Chesi",
      "M. Davenport",
      "M. Delattre",
      "L. Di Lella",
      "F. Formenti",
      "I. G. Irastorza",
      "H. Gomez",
      "M. Hasinoff",
      "B. Laki\u0107",
      "G. Luz\u00f3n",
      "J. Morales",
      "L. Musa",
      "A. Ortiz",
      "A. Placci",
      "A. Rodriguez",
      "J. Ruz",
      "J. A. Villar",
      "K. Zioutas"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1088/1367-2630/9/6/171",
    "journal_ref": "NewJ.Phys.9:171,2007",
    "title": "The CAST Time Projection Chamber",
    "url": "https://arxiv.org/abs/physics/0702189"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ae2df572-b05f-4314-9dcb-240d71cff6b0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}