A self-organized criticality model for ion temperature gradient mode driven turbulence in confined plasma

Isliker, H; Pisokas, TH; Strintzi, D; Vlahos, L

dc.contributor.author	Isliker, H	en
dc.contributor.author	Pisokas, TH	en
dc.contributor.author	Strintzi, D	en
dc.contributor.author	Vlahos, L	en
dc.date.accessioned	2014-03-01T01:32:32Z
dc.date.available	2014-03-01T01:32:32Z
dc.date.issued	2010	en
dc.identifier.issn	1070-664X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20173
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Basic properties	en
dc.subject.other	Confined plasmas	en
dc.subject.other	Diffusive process	en
dc.subject.other	Fusion plasmas	en
dc.subject.other	Heat transport	en
dc.subject.other	Heating process	en
dc.subject.other	High stiffness	en
dc.subject.other	Ion temperature	en
dc.subject.other	Ion temperature gradient	en
dc.subject.other	Ion temperature gradient modes	en
dc.subject.other	Ion temperature profiles	en
dc.subject.other	Loading patterns	en
dc.subject.other	Main characteristics	en
dc.subject.other	Physical process	en
dc.subject.other	Physical variables	en
dc.subject.other	Power-law	en
dc.subject.other	Self-organized criticality	en
dc.subject.other	Temporal evolution	en
dc.subject.other	Cellular automata	en
dc.subject.other	Criticality (nuclear fission)	en
dc.subject.other	Pattern recognition systems	en
dc.subject.other	Plasma confinement	en
dc.subject.other	Thermal gradients	en
dc.subject.other	Turbulence	en
dc.subject.other	Ions	en
dc.title	A self-organized criticality model for ion temperature gradient mode driven turbulence in confined plasma	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.3458668	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.3458668	en
heal.identifier.secondary	082303	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	A new self-organized criticality (SOC) model is introduced in the form of a cellular automaton (CA) for ion temperature gradient (ITG) mode driven turbulence in fusion plasmas. Main characteristics of the model are that it is constructed in terms of the actual physical variable, the ion temperature, and that the temporal evolution of the CA, which necessarily is in the form of rules, mimics actual physical processes as they are considered to be active in the system, i.e., a heating process and a local diffusive process that sets on if a threshold in the normalized ITG R/L-T is exceeded. The model reaches the SOC state and yields ion temperature profiles of exponential shape, which exhibit very high stiffness, in that they basically are independent of the loading pattern applied. This implies that there is anomalous heat transport present in the system, despite the fact that diffusion at the local level is imposed to be of a normal kind. The distributions of the heat fluxes in the system and of the heat out-fluxes are of power-law shape. The basic properties of the model are in good qualitative agreement with experimental results. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3458668]	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Physics of Plasmas	en
dc.identifier.doi	10.1063/1.3458668	en
dc.identifier.isi	ISI:000281906300015	en
dc.identifier.volume	17	en
dc.identifier.issue	8	en