Statistics of plasma fluctuations in runaway discharges in TCABR tokamak

M S Baptista, I L Caldas, W P de Sa, J I Elizondo

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In this work we analyze the spikes in the H-alpha emission, and density turbulence in runaway discharges in the TCABR tokamak. For the plasma edge density fluctuations, we find a symmetric-recurrent-type turbulence, with the same statistics found in measures of low-dimensional recurrent chaotic systems. For the plasma core fluctuations, we note that the line density oscillations axe synchronized to the H-alpha oscillations. In addition, we suggest that both the onset of the H-alpha spikes and the line density oscillations axe triggered by a process similar to the bifurcation responsible for the firing of neurons.

Original languageEnglish
Pages (from-to)95-99
Number of pages5
JournalBrazilian Journal of Physics
Issue number1
Publication statusPublished - Mar 2002


  • disruptions
  • JET

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