Self-organized criticality in MHD driven plasma edge turbulence
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
14/10/2013
14/10/2013
2012
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| Resumo |
We analyze long-range time correlations and self-similar characteristics of the electrostatic turbulence at the plasma edge and scrape-off layer in the Tokamak Chauffage Alfven Bresillien (TCABR), with low and high Magnetohydrodynamics (MHD) activity. We find evidence of self-organized criticality (SOC), mainly in the region near the tokamak limiter. Comparative analyses of data before and during the MHD activity reveals that during the high mHD activity the Hurst parameter decreases. Finally, we present a cellular automaton whose parameters are adjusted to simulate the analyzed turbulence SOC change with the MHD activity variation. (C) 2011 Published by Elsevier B.V. CNPq CNPq CAPES CAPES FAPESP FAPESP Fundacao Araucaria Fundacao Araucaria |
| Identificador |
PHYSICS LETTERS A, AMSTERDAM, v. 376, n. 5, supl. 1, Part 1, pp. 753-757, 42370, 2012 0375-9601 http://www.producao.usp.br/handle/BDPI/34315 10.1016/j.physleta.2011.12.026 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
| Relação |
PHYSICS LETTERS A |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #PLASMA #TURBULENCE #SELF-ORGANIZED CRITICALITY #MHD ACTIVITY #MAGNETICALLY CONFINED PLASMAS #TCABR TOKAMAK #TRANSPORT #MODEL #RECURRENCE #ELECTRODE #PARADIGM #DYNAMICS #PHYSICS, MULTIDISCIPLINARY |
| Tipo |
article original article publishedVersion |
