{
  "annotation_id": "26b40059-0dc5-4e10-b815-55531db671a2",
  "date_created": "2026-03-02T18:00:49.117000Z",
  "date_modified": "2026-03-02T18:00:49.117000Z",
  "file_hash": "aca79a0b5d71021c09dc009c59ee294f51f3545db133326843daf30408b062fd",
  "private": false,
  "record": {
    "abstract": "KEKB is a high luminosity e+e- collider for studying B mesons and has\nachieved the design luminosity of 1034cm-2s-1 in 2003. In order to get higher\nluminosity, we tested negative momentum compaction optics in the summer of\n2003. We measured the bunch length using three methods at 0.7mA to 1.17mA bunch\ncurrent and confirmed the length was shortened with the negative momentum\ncompaction optics.",
    "arxiv_id": "physics/0401155",
    "authors": [
      "H. Ikeda",
      "J. W. Flanagan",
      "H. Fukuma",
      "S. Hiramatsu",
      "T. Ieiri",
      "H. Koiso",
      "T. Mimashi",
      "T. Mitsuhashi"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "title": "Negative Momentum Compaction at KEKB",
    "url": "https://arxiv.org/abs/physics/0401155"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "11f7f8af-19de-4610-bdc0-d326a6b61351",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}