{
  "annotation_id": "d1d85315-c6f1-4883-b844-4f07e18b44dc",
  "date_created": "2026-03-02T18:00:31.677000Z",
  "date_modified": "2026-03-02T18:00:31.677000Z",
  "file_hash": "c7a4543e03f507cf4ce29820b41e49c1521cd17e83624fddf0740f0848d851eb",
  "private": false,
  "record": {
    "abstract": "Electromagnetic modeling with MAFIA of the combined beam position-phase\nmonitors (BPPMs) for the Spallation Neutron Source (SNS) linac has been\nperformed. Time-domain 3-D simulations are used to compute the signal\namplitudes and phases on the BPPM electrodes for a given processing frequency,\n402.5 MHz or 805 MHz, as functions of the beam transverse position. Working\nwith a summed signal from all the BPPM electrodes provides a good way to\nmeasure accurately the beam phase. While for an off-axis beam the signal phases\non the individual electrodes can differ from those for a centered beam by a few\ndegrees, the phase of the summed signal is found to be independent of the beam\ntransverse position inside the device. Based on the analysis results, an\noptimal BPPM design with 4 one-end-shorted 60-degree electrodes has been\nchosen. It provides a good linearity and sufficient signal power for both\nposition and phase measurements, while satisfying the linac geometrical\nconstrains and mechanical requirements.",
    "arxiv_id": "physics/0008095",
    "authors": [
      "Sergey S. Kurennoy"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "journal_ref": "eConf C000821:MOC11,2000",
    "title": "Beam Position-Phase Monitors for SNS Linac",
    "url": "https://arxiv.org/abs/physics/0008095"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d40ec282-50fc-4eec-bb85-8b0ac6234037",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}