{
  "annotation_id": "04d9ca51-7f73-4b95-a957-8a3da94a1da8",
  "date_created": "2026-03-02T18:00:53.692000Z",
  "date_modified": "2026-03-02T18:00:53.692000Z",
  "file_hash": "cc740c407fb0545b55e70a1842cbdd588e2fffba648d8f20f78c6bed57ae18ae",
  "private": false,
  "record": {
    "abstract": "Atomic hydrogen cleaning followed by heat cleaning at 450$^\\circ$C was used\nto prepare negative-electron-affinity GaAs photocathodes. When hydrogen ions\nwere eliminated, quantum efficiencies of 15% were obtained for bulk GaAs\ncathodes, higher than the results obtained using conventional 600$^\\circ$C heat\ncleaning. The low-temperature cleaning technique was successfully applied to\nthin, strained GaAs cathodes used for producing highly polarized electrons. No\ndepolarization was observed even when the optimum cleaning time of about 30\nseconds was extended by a factor of 100.",
    "arxiv_id": "physics/0412098",
    "authors": [
      "T. Maruyama",
      "D. -A. Luh",
      "A. Brachmann",
      "J. E. Clendenin",
      "E. L. Garwin",
      "S. Harvey",
      "R. E. Kirby",
      "C. Y. Prescott",
      "R. Prepost"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1142/9789812701909_0198",
    "title": "Atomic Hydrogen Cleaning of Polarized GaAs Photocathodes",
    "url": "https://arxiv.org/abs/physics/0412098"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "86bdb313-4692-43db-9a3b-cce8b90e1593",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}