{
  "annotation_id": "c5eb31b9-4d87-4760-81a9-1dc158356c47",
  "date_created": "2026-03-02T18:00:49.858000Z",
  "date_modified": "2026-03-02T18:00:49.858000Z",
  "file_hash": "1284f8a2d88aa5a52d536a9eed877fb5cefe54b7c358ccebde379a75894efa10",
  "private": false,
  "record": {
    "abstract": "A large volume TPC is a leading candidate for the central tracking detector\nat a future high energy linear collider. To improve the resolution a new\nreadout based on micro-pattern gas detectors is being developed. Measurements\nof the spatial resolution of cosmic-ray tracks in a GEM TPC are presented. We\nfind that the resolution suffers if the readout pads are too wide with respect\nto the charge distribution at the readout plane due to insufficient charge\nsharing. For narrow pads of 2 x 6 mm**2 we measure a resolution of 100\nmicometer at short drift distances in the absence of an axial magnetic field.\nThe dependence of the spatial resolution as a function of drift distance allows\nthe determination of the underlying electron statistics. Our results show that\nthe present technique uses about half the statistical power available from the\nnumber of primary electrons. The track angle effect is observed as expected.",
    "arxiv_id": "physics/0402054",
    "authors": [
      "R. K. Carnegie",
      "M. S. Dixit",
      "J. Dubeau",
      "D. Karlen",
      "J. -P. Martin",
      "H. Mes",
      "K. Sachs"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1016/j.nima.2004.08.132",
    "journal_ref": "Nucl.Instrum.Meth.A538:372-383,2005",
    "title": "Resolution studies of cosmic-ray tracks in a TPC with GEM readout",
    "url": "https://arxiv.org/abs/physics/0402054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ba644b36-76ab-4cb9-96e4-0a9599f59151",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}