{
  "annotation_id": "b7f01d89-fd9f-4dd1-8142-59a825b91ee0",
  "date_created": "2026-03-02T18:00:36.268000Z",
  "date_modified": "2026-03-02T18:00:36.268000Z",
  "file_hash": "03ca69c4a4283242b8393e8beae2265387d0e54e2b9dc5e487a6990147685e65",
  "private": false,
  "record": {
    "abstract": "The parameters for a 30 GeV test beam are outlined for use with an undulator\nin the FFTB tunnel where the LCLS will eventually be housed. It is proposed to\nuse the SLAC linac and damping rings in their present mode of operation for PEP\nII injection, where 30 GeV beams are also delivered at 10 Hz to the FFTB. High\npeak currents are obtained with the addition of a second bunch compressor in\nthe linac. In order to minimize the synchrotron radiation induced emittance\ngrowth in the bunch compressor it is necessary to locate the new bunch\ncompressor at the low-energy end of the linac, just after the damping rings.\nThe bunch compressor is a duplicate of the LCLS chicane-style bunch compressor.\nThis test beam would provide an exciting possibility to test LCLS undulator\nsections and provide a unique high-brightness source of incoherent X-rays and\nbegin developing the LCLS experimental station. The facility will also act as a\nmuch needed accelerator test bed for the production, diagnostics and tuning of\nvery short bunches in preparation for the LCLS after the photo injector is\ncommissioned.",
    "arxiv_id": "physics/0104045",
    "authors": [
      "Patrick Krejcik"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "title": "Parameters for a 30 GeV Undulator Test Facility in the FFTB/LCLS",
    "url": "https://arxiv.org/abs/physics/0104045"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9db6ab10-de99-4fc3-a896-118aac51d4a6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}