{
  "annotation_id": "597fced8-6454-4db2-9857-a06e30bff577",
  "date_created": "2026-03-02T18:00:28.699000Z",
  "date_modified": "2026-03-02T18:00:28.699000Z",
  "file_hash": "892c8a0708fc2e05d21656324c9d9263c62428b5d703b1ce970fb285960af6dc",
  "private": false,
  "record": {
    "abstract": "An analysis of single-electron orbits in combined coaxial wiggler and axial\nguide magnetic fields is presented. Solutions of the equations of motion are\ndeveloped in a form convenient for computing orbital velocity components and\ntrajectories in the radially dependent wiggler. Simple analytical solutions are\nobtained in the radially-uniform-wiggler approximation and a formula for the\nderivative of the axial velocity $v_{\\|}$ with respect to Lorentz factor\n$\\gamma$ is derived. Results of numerical computations are presented and the\ncharacteristics of the equilibrium orbits are discussed. The third spatial\nharmonic of the coaxial wiggler field gives rise to group $III$ orbits which\nare characterized by a strong negative mass regime.",
    "arxiv_id": "physics/0002032",
    "authors": [
      "B. Maraghechi",
      "B. Farrokhi",
      "J. E. Willett",
      "U. -H. Hwang"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "doi": "10.1103/PhysRevE.61.7046",
    "title": "Equilibrium orbit analysis in a free-electron laser with a coaxial   wiggler",
    "url": "https://arxiv.org/abs/physics/0002032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c2940593-ebd0-47a6-9cd1-cba621d336b1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}