Non-linear magnetohydrodynamic simulations of density evolution in Tore Supra sawtoothing plasmas
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
23/10/2013
23/10/2013
2012
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Resumo |
The plasma density evolution in sawtooth regime on the Tore Supra tokamak is analyzed. The density is measured using fast-sweeping X-mode reflectometry which allows tomographic reconstructions. There is evidence that density is governed by the perpendicular electric flows, while temperature evolution is dominated by parallel diffusion. Postcursor oscillations sometimes lead to the formation of a density plateau, which is explained in terms of convection cells associated with the kink mode. A crescent-shaped density structure located inside q = 1 is often visible just after the crash and indicates that some part of the density withstands the crash. 3D full MHD nonlinear simulations with the code XTOR-2F recover this structure and show that it arises from the perpendicular flows emerging from the reconnection layer. The proportion of density reinjected inside the q = 1 surface is determined, and the implications in terms of helium ash transport are discussed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766893] European Communities European Communities |
Identificador |
PHYSICS OF PLASMAS, MELVILLE, v. 19, n. 11, supl. 1, Part 1, pp. 640-652, NOV, 2012 1070-664X http://www.producao.usp.br/handle/BDPI/35573 10.1063/1.4766893 |
Idioma(s) |
eng |
Publicador |
AMER INST PHYSICS MELVILLE |
Relação |
PHYSICS OF PLASMAS |
Direitos |
restrictedAccess Copyright AMER INST PHYSICS |
Palavras-Chave | #HIGH-TEMPERATURE PLASMAS #X-RAY TOMOGRAPHY #INTERNAL KINK #MAGNETIC RECONNECTION #M=1 RECONNECTION #TOKAMAK PLASMAS #OSCILLATIONS #DYNAMICS #COLLAPSE #MODE #PHYSICS, FLUIDS & PLASMAS |
Tipo |
article original article publishedVersion |