{
  "annotation_id": "f9a4bf2e-447e-417c-acfc-b2aac2b12b58",
  "date_created": "2026-03-02T18:01:17.307000Z",
  "date_modified": "2026-03-02T18:01:17.307000Z",
  "file_hash": "494bf1d20251c2bf757c08a85a3cec33a65a6c48ab7138e5b903553f36a538c3",
  "private": false,
  "record": {
    "abstract": "Selective enhancement (\u003e10^3) of harmonics extending to the water window\n(~4nm) generated in an argon gas filled straight bore capillary waveguide is\ndemonstrated. This enhancement is in good agreement with modeling which\nindicates that multimode quasi-phasematching (MMQPM) is achieved by rapid axial\nintensity modulations caused by beating between the fundamental and higher\norder capillary modes. Substantial pulse-energies (\u003e10nJ per pulse per harmonic\norder) at wavelengths beyond the carbon K-edge (~4.37nm, ~284eV) up to ~360eV\nare observed from argon ions for the first time.",
    "arxiv_id": "physics/0702117",
    "authors": [
      "M. Zepf",
      "B. Dromey",
      "M. Landreman",
      "P. Foster",
      "S. M. Hooker"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "doi": "10.1103/PhysRevLett.99.143901",
    "title": "Bright quasi-phasematched soft x-ray harmonic radiation from Argon ions",
    "url": "https://arxiv.org/abs/physics/0702117"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "902caea8-23d9-4ac5-9834-70ccf922b1c3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}