{
  "annotation_id": "a9798792-6d29-4278-a9fb-aab1d54eeddf",
  "date_created": "2026-03-02T18:00:50.437000Z",
  "date_modified": "2026-03-02T18:00:50.437000Z",
  "file_hash": "bb402f024be74689317ca47b07bb04e58174dbfc36b235cfc88da927953d7c88",
  "private": false,
  "record": {
    "abstract": "We present an improved system for orbit and betatron phase measurement\nutilizing nonlinear models of BPM pickup response. We first describe the\ncalculation of the BPM pickup signals as nonlinear functions of beam position\nusing Green\u0027s reciprocity theorem with a two-dimensional formalism. We then\ndescribe the incorporation of these calculations in our beam position\nmeasurements by inverting the nonlinear functions, giving us beam position as a\nfunction of the pickup signals, and how this is also used to improve our\nmeasurement of the betatron phase advance. Measurements are presented comparing\nthis system with the linearized pickup response used historically at CESR.",
    "arxiv_id": "physics/0406145",
    "authors": [
      "Richard W. Helms",
      "Georg H. Hoffstaetter"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "doi": "10.1103/PhysRevSTAB.8.062802",
    "journal_ref": "Phys.Rev.ST Accel.Beams 8:062802,2005",
    "title": "Orbit and Optics Improvement by Evaluating the Nonlinear BPM Response in   CESR",
    "url": "https://arxiv.org/abs/physics/0406145"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2f6372d1-66e6-4b7f-84dc-0d2dddf5cd8d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}