{
  "annotation_id": "51a635a2-ffa8-4e5d-ac45-b8428d6b0a4f",
  "date_created": "2026-03-02T18:00:53.816000Z",
  "date_modified": "2026-03-02T18:00:53.816000Z",
  "file_hash": "58489817cdb31b89b04171b518332e2a25500242ebe2f821bb200435d9e8a112",
  "private": false,
  "record": {
    "abstract": "One of the main objectives of the LHD is to extend the plasma confinement\ndatabase for helical systems and to demonstrate such extended plasma\nconfinement properties to be sustained in steady state. Among the various\nplasma parameter regimes, the study of confinement properties in the\ncollisionless regime is of particular importance. Electron cyclotron resonance\nheating (ECRH) has been extensively used for these confinement studies of the\nLHD plasma from the initial operation. The system optimizations including the\nmodification of the transmission and antenna system are performed with the\nspecial emphasis on the local heating properties. As the result, central\nelectron temperature of more than 10 keV with the electron density of 0.6 x\n10$^{19}$ m$^{-3}$ is achieved near the magnetic axis. The electron temperature\nprofile is characterized by a steep gradient similar to those of an internal\ntransport barrier observed in tokamaks and stellarators. 168 GHz ECRH system\ndemonstrated efficient heating at over the density more than 1.0 x 10$^{20}$\nm$^{-3}$. CW ECRH system is successfully operated to sustain 756 s discharge.",
    "arxiv_id": "physics/0410241",
    "authors": [
      "Shin Kubo"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "doi": "10.1088/0741-3335/47/5A/008",
    "title": "Extension and its characteristics of ECRH plasma in the LHD",
    "url": "https://arxiv.org/abs/physics/0410241"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3345ec5e-a14c-4736-ba8e-362871f9bdbd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}