{
  "annotation_id": "3e6b580f-0989-40b7-a0e2-9713b5dc44a8",
  "date_created": "2026-03-02T18:00:57.101000Z",
  "date_modified": "2026-03-02T18:00:57.101000Z",
  "file_hash": "c68d9fcadea5a48495cfee36d3543018210cf94c75b0f53a4803355e2c4d03b4",
  "private": false,
  "record": {
    "abstract": "A new CAD program, PolyCAD, designed for X-ray photon tracing in\npolycapillary optics is described. To understand the PolyCAD code and its\nresults, the theoretical basis of X-ray transmission by a single cylindrical\nchannel (monocapillary) is discussed first. Then the simplest cases of\ncylindrically and conically shaped polycapillary optics are examined. PolyCAD\nallows any type of X-ray source to be used: an X-ray tube of finite beam\ndimensions or an astrophysical object can be simulated in combination with the\npolycapillary optics. The radiation distribution images formed on a screen\nlocated at various focal distances are discussed. The good agreement of some of\nthe PolyCAD results with those reported in earlier papers validate the code.\nThis is the first paper of a series dedicated to the development of an\nexhaustive CAD program, work is in progress to develop the code to include\nother polycapillary-optics shapes, such as semi-lenses and full-lenses.",
    "arxiv_id": "physics/0502034",
    "authors": [
      "D. Hampai",
      "S. B. Dabagov",
      "G. Cappuccio",
      "G. Cibin"
    ],
    "categories": [
      "physics.optics",
      "physics.comp-ph"
    ],
    "doi": "10.1016/j.nimb.2005.10.009",
    "title": "X-ray propagation through hollow channel: PolyCAD - a ray tracing code   (1)",
    "url": "https://arxiv.org/abs/physics/0502034"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "222a1d9f-795a-42a5-94a6-8e266340d843",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}