{
  "annotation_id": "825be3ba-8ee0-4d42-9a19-287742e486e7",
  "date_created": "2026-03-02T18:01:07.353000Z",
  "date_modified": "2026-03-02T18:01:07.353000Z",
  "file_hash": "331294e02c373cea718f486c953f0395ae10e4a36428414003324c997c5dc95a",
  "private": false,
  "record": {
    "abstract": "The optical klystron enhancement to self-amplified spontaneous emission\n(SASE) free electron lasers (FELs) is studied in theory and in simulations. In\ncontrast to a seeded FEL, the optical klystron gain in a SASE FEL is not\nsensitive to any phase mismatch between the radiation and the microbunched\nelectron beam. The FEL performance with the addition of four optical klystrons\nlocated at the undulator long breaks in the Linac Coherent Light Source (LCLS)\nshows significant improvement if the uncorrelated energy spread at the\nundulator entrance can be controlled to a very small level. In addition, FEL\nsaturation at shorter x-ray wavelengths (around 1.0 \\AA) within the LCLS\nundulator length becomes possible. We also discuss the application of the\noptical klystron in a compact x-ray FEL design that employs relatively low\nelectron beam energy together with a short-period undulator.",
    "arxiv_id": "physics/0604028",
    "authors": [
      "Yuantao Ding",
      "Paul Emma",
      "Zhirong Huang",
      "Vinit Kumar"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "doi": "10.1103/PhysRevSTAB.9.070702",
    "journal_ref": "Phys.Rev.STAccel.Beams9:070702,2006",
    "title": "Optical Klystron Enhancement to SASE X-ray FELs",
    "url": "https://arxiv.org/abs/physics/0604028"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e8010b17-0e13-43a9-a495-9073a817e541",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}