{
  "annotation_id": "2400ed88-76ef-4aa7-851b-63b7a218bfce",
  "date_created": "2026-03-02T18:00:32.548000Z",
  "date_modified": "2026-03-02T18:00:32.548000Z",
  "file_hash": "7a6e34e1c6d40346775ca9e8ce7c87ac3302fc49f31a48bbf2245c4c8ae83523",
  "private": false,
  "record": {
    "abstract": "The S-band linear accelerator, which was built to be the source of particles\nand the front end of the Advanced Photon Source injector, is now also being\nused to support a low-energy undulator test line (LEUTL) and to drive a\nfree-electron laser (FEL). The more severe rf stability requirements of the FEL\nhave resulted in an effort to identify sources of phase and amplitude\ninstability and implement corresponding upgrades to the rf generation chain and\nthe measurement system. Test data and improvements implemented and planned are\ndescribed",
    "arxiv_id": "physics/0008122",
    "authors": [
      "T. L. Smith",
      "M. H. Cho",
      "A. E. Grelick",
      "G. Pile",
      "A. Nassiri",
      "N. Arnold"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "journal_ref": "eConf C000821 (2000) THc10",
    "title": "RF System Upgrades to the Advanced Photon Source Linear Accelerator in   Support of the Fel Operation",
    "url": "https://arxiv.org/abs/physics/0008122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "dc246db7-0d9c-444c-981a-4891aabd14bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}