{
  "annotation_id": "d754f979-6219-40b6-8c4a-095796df22e0",
  "date_created": "2026-03-02T18:00:35.976000Z",
  "date_modified": "2026-03-02T18:00:35.976000Z",
  "file_hash": "52ebb6d110bda676273d524d1cb9a84612c52680c69e64b722c0fad80b67deb4",
  "private": false,
  "record": {
    "abstract": "At a spallation neutron source, the wavelength of a neutron is generally\ndetermined by its time-of-flight (TOF) from the source to the detector. The\nachievable precision is ultimately limited by the non-zero emission time-width\nof the source/moderator system. Particularly, coupled moderators that are used\nto produce high intensity cold neutron beams show long \"tails\" in the\nintensity/time distribution for all wavelengths. For this reason much less\nintense decoupled moderators are often used for instruments that require high\nresolution. We present here a novel technique for dynamic energy filtering of\nthermal and cold polarized neutron beams. The device consists of a\npolarizer/analyzer system and an energy-selective spin-resonance flipper. By\ndrifting its resonance condition in synchronization with the TOF, the filter\ncontrols the energy resolution of a broad bandwidth TOF neutron pulse.\nCalculations show that substantial resolution gains are obtainable by applying\nthis technique to a TOF neutron reflectometer.",
    "arxiv_id": "physics/0105026",
    "authors": [
      "A. A. Parizzi",
      "W. -T. Lee",
      "G. P. Felcher",
      "F. Klose"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "title": "Decoupled Moderators - Do we always need them? or: A New Approach for   Pulse Shaping",
    "url": "https://arxiv.org/abs/physics/0105026"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6907a31b-de82-4b7a-9b5a-063b3b4499e9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}