{
  "annotation_id": "ee37563b-f68e-454d-bab8-c01cba0e9af1",
  "date_created": "2026-03-02T18:00:36.343000Z",
  "date_modified": "2026-03-02T18:00:36.343000Z",
  "file_hash": "39d778ab9565434521a223ab2c079e9879cc35ff64ba703f2efb15525ae745be",
  "private": false,
  "record": {
    "abstract": "The observation of plasma focusing of a 28.5 GeV positron beam is reported.\nThe plasma was formed by ionizing a nitrogen jet only 3 mm thick. Simultaneous\nfocusing in both transverse dimensions was observed with effective focusing\nstrengths of order Tesla per micron. The minimum area of the beam spot was\nreduced by a factor of 2.0 +/- 0.3 by the plasma. The longitudinal beam\nenvelope was measured and compared with numerical calculations.",
    "arxiv_id": "physics/0110015",
    "authors": [
      "J. S. T. Ng",
      "P. Chen",
      "H. Baldis",
      "P. Bolton",
      "D. Cline",
      "W. Craddock",
      "C. Crawford",
      "F. J. Decker",
      "C. Field",
      "Y. Fukui",
      "V. Kumar",
      "R. Iverson",
      "F. King",
      "R. E. Kirby",
      "K. Nakajima",
      "R. Noble",
      "A. Ogata",
      "P. Raimondi",
      "D. Walz",
      "A. W. Weidemann"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.244801",
    "journal_ref": "Phys.Rev.Lett. 87 (2001) 244801",
    "title": "Observation of Plasma Focusing of a 28.5 GeV Positron Beam",
    "url": "https://arxiv.org/abs/physics/0110015"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b762a15c-8c91-4eaf-b322-10cf887dda81",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}