{
  "annotation_id": "527f9087-e584-4ca7-a060-b04b3d4a1ce4",
  "date_created": "2026-03-02T18:00:53.853000Z",
  "date_modified": "2026-03-02T18:00:53.853000Z",
  "file_hash": "d0ef7476c3c7c708e35c52d58c23dc47058e1e8f786bad4f5c6836c9a5426ecd",
  "private": false,
  "record": {
    "abstract": "Understanding of the transport in a Tokamak plasma is an important issue.\nVarious mechanisms have been reported in the literature to relate the core\nphenomenon to edge phenomenon. Sawtooth and Mirnov oscillations caused by MHD\ninstabilities are generally observed in Tokamak discharges. Observation of\nthese effects in the visible radiation from outer edge may offer a possible\nmeans to understand the transport.Oscillations in the visible radiation from\nouter region of the plasma have been observed during recent Aditya discharges.\nPercentage modulation of these oscillations vary with the Lines of Sight (LOS)\nof the chords and surfaces on which they terminate. This has been found in both\nthe low frequency (~1 kHz) oscillations that seem to correlate with sawteething\nin SXR signals and the higher frequency (~10 kHz) oscillations that correlate\nwell with Mirnov signals indicative of m/n=2/1 mode rotation. This suggests\nthat the extent to which the MHD instabilities in the central region of the\nplasma column are reflected in the edge radiation depends on the interaction of\nthe plasma with the surface at the extremity of the LOS. The release of\nparticle/ energy accompanying the MHD instabilities leads to a large influx of\nparticles from such surfaces. Cross-bispectral analysis suggests that a mode\n(having frequency of ~20 kHz) is also generated due to the interaction of\nm/n=1/1 (~10 kHz, seen in SXR) and m/n=2/1 (~10 kHz, seen in Mirnov, Visible \u0026\nMicrowave Interferometer signals). By possible selection rules, this mode seems\nto be a m/n=3/2 mode. This mode is seen in Mirnov, Visible \u0026 Interferometer\nsignals. Behaviour of these oscillations on various LOS and their relation to\nSXR\u0026Mirnov signals can lead to an understanding of the transport phenomenon.\nThese observations and our interpretations will be presented.",
    "arxiv_id": "physics/0411131",
    "authors": [
      "M. B. Chowdhuri",
      "D. Raju",
      "R. Manchanda",
      "Vinay Kumar",
      "Shankar Joisa",
      "P. K. Atrey",
      "C. V. S. Rao",
      "R. Jha",
      "R. Singh",
      "P. Vasu",
      "the Aditya Collaboration"
    ],
    "categories": [
      "physics.plasm-ph"
    ],
    "title": "Exploring Core-to-edge Transport in Aditya Tokamak by Oscillations   Observed in the edge Radiation",
    "url": "https://arxiv.org/abs/physics/0411131"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "19492d4e-3f81-4032-bb19-bdd45ff0d846",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}