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(TH/P3-09) Modeling of ELM-like Phenomenology via SOC-Diffusive Dynamics

R. Sanchez¹⁾, D.E. Newman²⁾, R. Woodard²⁾, W. Ferenbaugh²⁾, B.A. Carreras³⁾, H.R. Hicks^3)
 
1) Departamento de Fisica, Universidad Carlos III de Madrid, Madrid, Spain
²⁾ University of Alaska-Fairbanks, Fairbanks, AK, USA
³⁾ Oak Ridge National Laboratory, Oak Ridge, TN, USA

Abstract.  A physically-based extension of a SOC sandpile model is investigated to try to gain some understanding as to the extent that SOC models might reproduce ELM-like dynamics like those observed in magnetically confined plasmas. This type of model allows one to isolate the interactions of physically meaningful elements such as classical diffusion, critical gradients for the onset of turbulence, transport barriers or the external drive, which can thus be more easily analyzed. The model behaviour can be made to transit to regimes of disparate characteristics by modifying the relative importance of these elements. Interestingly, in some ofthese regimes, quasi-periodic edge-localized events reminiscent of ELM-type events come to dominate the dynamics.

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