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before crash

i. i. r. r. f. f. m. m. c. c. a. a. a. a. r. r. a. a. c. c. e. e. d. d. h. h. ). CEA. -. Cadarache, 13108 ST PAUL. -. LEZ. -. DURANCE (France. before crash. after crash. Non-axisymmetric Neoclassical Particle Transport in Tore Supra.

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  1. i i r r f f m m c c a a a a r r a a c c e e d d h h ) CEA - Cadarache, 13108 ST PAUL - LEZ - DURANCE (France before crash after crash Non-axisymmetric Neoclassical Particle Transport in Tore Supra R. Guirlet, A. Sirinelli, T. Parisot, R. Sabot, X. Garbet,J.F. Artaud, C. Bourdelle, P. Hennequin1, G.T. Hoang, F. Imbeaux, J.L. Ségui, D. Villegas Institut de Recherche sur la Fusion Magnétique 1Laboratoire de Physique des Plasmas, CNRS/Ecole Polytechnique, Palaiseau, France • Summary: Particle transport in tokamak plasmas is determined by collisions and turbulence. We report observations of low core turbulence plasmas in which: •  electron transport > collisional predictions  impurity transport  collisional predictions • agreement with non-axisymmetric collisional calculations •  Non axisymmetric neoclassical transport due to MHD can enhance significantly light species transport.R. Guirlet et al., Nucl. Fusion 50, 095009 (2010) Electron transport Experiment/observations Ohmic, sawtoothing plasmas: Flux: ne q = 1 In core: Te t  ne plateau within q=1  Peak builds up between sawtooth crashes  Low turbulence level in core  Width  with IP IP  VeexpVeNC-axisym  Deexp >> DeNC-axisym r(q=1) Impurity transport Non-axisymmetric neoclassical calculations  Radial transport code:Resolution of coupled continuity equations for all ionisation stages Field pert. due to persisting (m=1, n=1) mode:  Sawtooth effect on imp.  Bgd emission subtractd 1. Particles trapped in pert.: • e- : 10-4 - 510-3 m2/s,  Deexp • Ni : 10-3 m2/s << DNiexp 2. Curvature drift of pert. / trapped in main B : << DNiexp  VNiexp VNiNC-axisym  DNiexp  DNiNC-axisym Deexp DeNC-axisym + DHP,e + DBanana_drift, e DNiexp  DNiNC-axisym + DHP,Ni + DRipple-plateau, Ni Parisot Th. et al., Plasma Phys. Control. Fusion 50, 055010 (2008) Guirlet R. et al., Nucl. Fusion 49, 055007 (2009) Villegas D. et al., 36th EPS Conf. Plasma Phys. Control. Fusion, Sofia (2009) Garbet X. et al., Phys. Plasmas 17, 072505 (2010) Sabot S. et al., Plasma Phys. Control. Fusion, 48 B421 (2006) Clairet F. et al., Plasma Phys. Control. Fusion, 43 429 (2001). Sabot S. et al., Nucl. Fusion, 46, S685 (2006). Houlberg W.A. et al., Phys. Plasmas 4, 3230 (1997). Bourdelle C. et al., Phys. Plasmas 14, 112501 (2007). Casati A. et al., Nucl. Fusion 49, 085012 (2009).

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