{
  "annotation_id": "18ca9686-50ee-4256-8aa2-0257fad4ace3",
  "date_created": "2026-03-02T18:00:46.157000Z",
  "date_modified": "2026-03-02T18:00:46.157000Z",
  "file_hash": "d0dd8ddbcdb974fe077c367de811472630cb9a37950b828ee84335f6553b8380",
  "private": false,
  "record": {
    "abstract": "We have built and tested a 3.5 m high-finesse Fabry-Perot prototype\ninteferometer with a precision ellipsometer for the QED test and axion search\n(Q \u0026 A) experiment. We use X-pendulum-double-pendulum suspension designs and\nautomatic control schemes developed by the gravitational-wave detection\ncommunity. Verdet constant and Cotton-Mouton constant of the air are measured\nas a test. Double modulation with polarization modulation 100 Hz and\nmagnetic-field modulation 0.05 Hz gives 10^{-7} rad phase noise for a 44-minute\nintegration.",
    "arxiv_id": "physics/0308080",
    "authors": [
      "Jeah-Sheng Wu",
      "Wei-Tou Ni",
      "Sheng-Jui Chen"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1088/0264-9381/21/5/130",
    "journal_ref": "Class.Quant.Grav. 21 (2004) S1259",
    "title": "Building a 3.5 m prototype interferometer for the Q \u0026 A vacuum   birefringence experiment and high precision ellipsometry",
    "url": "https://arxiv.org/abs/physics/0308080"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f1bd469e-186f-44a4-800b-ce783814c3aa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}