{
  "annotation_id": "0aba31c3-e42c-4aef-9659-c361643d7854",
  "date_created": "2026-03-02T18:00:32.661000Z",
  "date_modified": "2026-03-02T18:00:32.661000Z",
  "file_hash": "b0c9dcf8d755365c68472d4954d001d3f65610283e5358129d44cf8fc17b62c2",
  "private": false,
  "record": {
    "abstract": "We consider a technique to determine the initial beam conditions of the DARHT\nII Accelerator by measuring the beam size under three different magnetic\ntransport settings. This may be time gated to resolve the parameters as a\nfunction of time within the 2000 nsec pulse. This technique leads to three\nequations in three unknowns with solution giving the accelerator exit beam\nradius, tilt and emittance. We find that systematic errors cancel and so are\nnot a problem in unfolding the initial beam conditions. Random uncorrelated\nshot to shot errors can be managed by one of three strategies: 1) make the\ntransport system optically de-magnifying; 2) average over many individual\nshots; or 3) make the random uncorrelated shot to shot errors sufficiently\nsmall. The high power of the DARHT II beam requires that the beam transport\nsystem leading to a radius measuring apparatus be optically magnifying. This\nmeans that the shot to shot random errors must either be made small (less than\nabout 1%) or that we average each of the three beam radius determinations over\nmany individual shots.",
    "arxiv_id": "physics/0008057",
    "authors": [
      "Arthur C. Paul"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "journal_ref": "eConf C000821 (2000) TUB10",
    "title": "Reconstruction of Initial Beam Conditions at the Exit of the DARHT II   Accelerator",
    "url": "https://arxiv.org/abs/physics/0008057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4f2adf7d-b990-4de8-8d49-1a5505ef149f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}