{
  "annotation_id": "f6b8aaf0-0f1a-4259-811d-82c5060391a9",
  "date_created": "2026-03-02T18:00:53.634000Z",
  "date_modified": "2026-03-02T18:00:53.634000Z",
  "file_hash": "c6576df301732193b768e503a61aa5ead221755ea340f8c416e883ae3e3f1bc9",
  "private": false,
  "record": {
    "abstract": "Characteristics of ion acceleration in the internal magnetic reconnection\nevents (IRE) have been studied by means of a neutral particle energy analyzer\n(NPA) in Tokyo Spherical Tokamak (TST-2). The major and minor radii are 0.38 m\nand 0.25m, respectively. The magnetic field strength is 0.3T and the maximum\nplasma current is up to 140 kA. The electron and ion temperatures are 0.4-0.5\nkeV and 0.1 keV, respectively and the electron density is ~1x1019 m-3. The NPA\ncan be scanned toroidally from q = 74\u0026deg; (cw) to q = 114\u0026deg; (ccw), where q\n= 90\u0026deg; corresponds to the perpendicular sightline. The direction of the\nplasma current is cw. The NPA signals are digitized at every 50 ms. The NPA is\ncalibrated in the energy range of 0.1 keV \u003c E \u003c 8.4 keV. When the IRE occurs,\nit is observed that the plasma current increases by ~ 20% and the loop voltage\ndrops from 0.6 V to-5 V for ~ 0.1 ms. The enhanced charge exchange flux is\nobserved by more than one order of magnitude at ~ 1 keV for this reconnection\nphase. The ion temperature increases by 80 eV at IREs. The angle q dependence\nof increment of Ti shows that DTi (q = 74\u0026deg;) is higher than that for q =\n114\u0026deg;. This observation suggests that an ion is accelerated initially in the\ndirection of magnetic field lines. The time evolution of the ion distribution\nfunction is simulated with a Fokker-Planck code taking into account the\nelectric field effects.",
    "arxiv_id": "physics/0410229",
    "authors": [
      "Hiroyuki Hoshika",
      "H. Zushi",
      "M. Aramasu",
      "H. Idei",
      "A. Iyomasa",
      "A. Ejiri",
      "S. Ohara",
      "H. Kasahara",
      "Y. Kamada",
      "S. Kawasaki",
      "M. Sakamoto",
      "K. Sasaki",
      "K. Sato",
      "S. Shiraiwa",
      "Y. Takagi",
      "Y. Takase",
      "H. Nakashima",
      "K. Nakamura",
      "M. Hasegawa",
      "K. Hanada",
      "A. Higashijima",
      "T. Yamada"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "title": "Ion acceleration during internal magnetic reconnection events in TST-2",
    "url": "https://arxiv.org/abs/physics/0410229"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "56975ca4-86e6-404f-9fd9-0c74e493f1a0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}