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Ion kinetic transport in TJ-II

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Velasco, J. L. and Castejón, F. and Fernández Pérez, Luis Antonio and Martín Mayor, Víctor and Tarancón, A. (2008) Ion kinetic transport in TJ-II. AIP conference proceedings: large scale simulations of complex systems, condensed matter and fusion plasma, 1071 . pp. 109-123. ISSN 0094-243x

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Official URL: http://dx.doi.org/10.1063/1.3033356


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Abstract

The ion Drift Kinetic Equation (DKE) which describes the ion coUisional transport is solved for the TJ-II device plasmas. This non-linear equation is computed by peribrming a mean field iterative calculation. In each step of the calculation, a Fokker-Planck equation is solved by means of the Langevin approach: one million particles are followed in a realistic TJ-II magnetic configuration, taking into account collisions and electric field. This allows to avoid the assumptions made in the usual neoclassical approach, namely considering radially narrow particle trajectories, diffusive transport, energy conservation and infinite parallel transport. As a consequence, global features of transport, not present in the customary neoclassical models, appear: non-diffusive transport and asymmetries on the magnetic surfaces.


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© 2008 American Institute of Physics. BIFI International Congress (111th. 2008. Zaragoza, Spain). We acknowledge partial financial support from MEC (Spain), through research contract FIS2006-08533-C03, European Commission through contracts EGEE-II-03I688 and int.eu.grid 031857, and from BSCH-UCM. J.L. Velasco is a DGA (Aragón, Spain) fellow. Great accuracy has been achieved thanks to the use of the computing platform 0048257301 Zivis [27].

Uncontrolled Keywords:Radial electric-field; ECRH plasmas; Neoclassical transport; Heat confinement; Stellarator; Simulations; Reduction.
Subjects:Sciences > Physics
Sciences > Physics > Physics-Mathematical models
ID Code:38311
Deposited On:05 Jul 2016 07:59
Last Modified:09 Aug 2016 10:29

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