{
  "annotation_id": "504b3226-880d-49eb-baa0-5c331d1ff0ae",
  "date_created": "2026-03-02T18:00:32.367000Z",
  "date_modified": "2026-03-02T18:00:32.367000Z",
  "file_hash": "3a60319cb9853b77c5a88d3cad77b4b6a6a25cfa7a839bd0fdd411312af9c1b3",
  "private": false,
  "record": {
    "abstract": "A technique for production of an electron beam with a high transverse\nemittance ratio. a \"flat\" beam, has been proposed by Brinkmann, Derbenev, and\nFloettmann.[1] The cathode of an RF-laser gun is immersed in a solenoidal\nmagnetic field; as a result the beam emitted from a round laser spot has a net\nangular momentum. Subsequent passage through a quadrupole channel that has a 90\ndegree difference in phase advance between the transverse degrees of freedom\nresults in a flat beam. Experimental study is underway at the Fermilab A0\nPhotoinjector. Thus far, transverse emittance ratios as high as 50 have been\nobserved, and the results are in substantial agreement with simulation.\n  [1] R. Brinkmann, Ya. Derbenev, K. Floettmann, \"A Flat Beam Electron Source\nfor Linear Colliders.\" TESLA Note 99-09, April 1999.",
    "arxiv_id": "physics/0008042",
    "authors": [
      "D. Edwards",
      "H. Edwards",
      "N. Holtkamp",
      "S. Nagaitsev",
      "J. Santucci",
      "R. Brinkmann",
      "K. Desler",
      "K. Floettmann",
      "I. Bohnet",
      "M. Ferrario"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "journal_ref": "eConf C000821 (2000) THc13",
    "title": "The Flat Beam Experiment at the FNAL Photoinjector",
    "url": "https://arxiv.org/abs/physics/0008042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "28ee4a3c-5246-4186-9641-230bcc1f787f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}