1. Collisional vertical f -asymmetry effect
- Author
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Maget, P, Frank, J, Manas, P, Dumont, R, Nicolas, T, Artaud, J-F, Bourdelle, C, Colas, L, Goniche, M, Agullo, O, Garbet, X, Lütjens, H, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), HPC resources from GENCI (project 056348), IAEA, The WEST team, European Project: 633053,H2020,EURATOM-Adhoc-2014-20,EUROfusion(2014), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), icard, valerie, and Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium - EUROfusion - - H20202014-01-01 - 2018-12-31 - 633053 - VALID
- Subjects
[PHYS]Physics [physics] ,[PHYS.PHYS]Physics [physics]/Physics [physics] ,Physics::Plasma Physics ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,[PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,[PHYS.PHYS] Physics [physics]/Physics [physics] ,[PHYS] Physics [physics] - Abstract
International audience; The use of metallic walls as plasma facing components in tokamaks puts severe constraints on the control of impurity contamination. Heavy impurities like Tungsten are of particular concern due to the high level of radiative losses they can induce. Moreover, their high sensitivity to neoclassical transport mechanisms exacerbated by toroidal rotation or electrostatic potential asymmetry generally explains experimental cases of strong accumulation in the plasma core. The poloidal distribution of the impurity modulates the amplitude of this neoclassical transport [Angioni14], with an asymmetry that often leads to enhancement, but that can also result in a reduction of the flux
- Published
- 2021