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Investigation of inter-ELM ion heat transport in the H-mode pedestal of ASDEX Upgrade plasmas

AutorViezzer, Eleonora
Fecha de publicación2017
EditorInstitute of Physics Publishing
CitaciónNuclear Fusion 57(2): 022020 (2017)
ResumenThe ion heat transport in the pedestal of H-mode plasmas is investigated in various H-mode discharges with different pedestal ion collisionalities. Interpretive modelling suggests that in all analyzed discharges the ion heat diffusivity coefficient, Xi, in the pedestal is close to the neoclassical prediction within the experimental uncertainties. The impact of changing the deposition location of the electron cyclotron resonance heating on the ion heat transport has been studied. The effect on the background profiles is small. The pre-ELM (edge localized modes) edge profiles as well as the behaviour of the electron temperature and density, ion temperature and impurity toroidal rotation during the ELM cycle are very similar in discharges with on- and off-axis ECRH heating. No significant deviation of Xi from neoclassics is observed when changing the ECRH deposition location to the plasma edge.
DescripciónTrabajo presentado al 15th International Workshop on H-mode Physics and Transport Barriers, celebrado en Garching (Alemania) del 19 al 21 de octubre de 2015.-- ASDEX Upgrade Team and the EUROfusion MST1 Team: et al.
Versión del editorhttp://iopscience.iop.org/article/10.1088/0029-5515/57/2/022020/meta
URIhttp://hdl.handle.net/10261/159105
ISSN0029-5515
E-ISSN1741-4326
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