{
  "annotation_id": "025e04af-b4f5-468b-a6e9-95d18d0a5381",
  "date_created": "2026-03-02T18:00:39.049000Z",
  "date_modified": "2026-03-02T18:00:39.049000Z",
  "file_hash": "c5dc1a889e921f99b7d26d9704498fe77ebc4797476ae196dc304edc36bf752e",
  "private": false,
  "record": {
    "abstract": "We demonstrate a 13-fold increase in hard x-ray bremsstrahlung (10 - 200 keV)\nemitted by a copper plasma created by 100 fs, 806 nm pulses at\n$10^{14}-10^{15}$ Wcm$^{-2}$. This enhancement is achieved by roughening the\ntarget surface with copper nanoparticles of ~15 nm size. A simple model that\ninvokes local field modifications by surface plasmon excitation and `lightning\nrod\u0027 effects explains the observed enhancement quantitatively and provides\npointers to the design of structured surfaces for maximizing the emission.",
    "arxiv_id": "physics/0204027",
    "authors": [
      "P. P. Rajeev",
      "P. Taneja",
      "P. Ayyub",
      "A. S. Sandhu",
      "G. R. Kumar"
    ],
    "categories": [
      "physics.plasm-ph",
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.115002",
    "title": "Metal nanoplasmas as bright sources of hard x-ray pulses",
    "url": "https://arxiv.org/abs/physics/0204027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fa8e6822-7923-4ae0-bedd-b71fd8a3901f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}