{
  "annotation_id": "6220b269-6dc2-46b9-a155-7ffa55c97873",
  "date_created": "2026-03-02T18:00:56.100000Z",
  "date_modified": "2026-03-02T18:00:56.100000Z",
  "file_hash": "02ca1afacb7d744101635298dd8ecf4f79691c18635b7f7068073fa6ccce50e9",
  "private": false,
  "record": {
    "abstract": "Twelve pulsed gamma-T quads have been installed in the Booster to provide\nfast transition crossing. The less time the beam stays in the non-adiabatic\nperiod near transition, the less the longitudinal emittance grows. From the\npast experience, the gamma-T quads are not well aligned relative to the usual\nclosed orbit. Quad steering can cause beam loss and a dispersion wave after\ntransition. To make the gamma-T quads routinely operational, procedures for\nfinding the center of the beam relative to the quads and centering the beam\nthrough all of them are very important. A program, which uses the difference in\nthe closed orbits when gamma-T quads are on and off and calculates the offsets\nof the beam relative to gamma-T quads, has been developed and tested. A radial\norbit offset (ROF) of about 3 mm has been experimentally determined to be\nnearly the optimal radial position for centering the beam through all the\ngamma-T quads, thereby eliminating the immediate need for repositioning the\nquads.",
    "arxiv_id": "physics/0501031",
    "authors": [
      "Xi Yang",
      "Charles M. Ankenbrandt",
      "James MacLachlan"
    ],
    "categories": [
      "physics.acc-ph"
    ],
    "title": "Beam-Based Determination of the Offset of Booster gamma-T Quads",
    "url": "https://arxiv.org/abs/physics/0501031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0c1b843f-573a-4d55-bac4-6b5bba76c7a6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}