Theoretical description of heavy impurity transport and its application to the modelling of tungsten in JET and ASDEX upgrade

0453587 - ÚFP 2016 RIV GB eng J - Článek v odborném periodiku
Casson, F.J. - Angioni, C. - Belli, E.A. - Bilato, R. - Mantica, P. - Odstrčil, T. - Pütterich, T. - Valisa, M. - Garzotti, L. - Giroud, C. - Hobirk, J. - Maggi, C.F. - Mlynář, Jan - Reinke, M.L.
Theoretical description of heavy impurity transport and its application to the modelling of tungsten in JET and ASDEX upgrade.
Plasma Physics and Controlled Fusion. Roč. 57, č. 1 (2015), č. článku 014031. ISSN 0741-3335. E-ISSN 1361-6587
Institucionální podpora: RVO:61389021
Klíčová slova: tokamak * impurity * transport * neoclassical * validation * modelling * tungsten
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.404, rok: 2015
http://iopscience.iop.org/article/10.1088/0741-3335/57/1/014031/meta

The effects of poloidal asymmetries and heated minority species are shown to be necessary to accurately describe heavy impurity transport in present experiments in JET and ASDEX Upgrade. Plasma rotation, or any small background electrostatic field in the plasma, such as that generated by anisotropic external heating can generate strong poloidal density variation of heavy impurities. These asymmetries have recently been added to numerical tools describing both neoclassical and turbulent transport and can increase neoclassical tungsten transport by an order of magnitude. Modelling predictions of the steady state two-dimensional tungsten impurity distribution are compared with tomography from soft x-ray diagnostics.
Trvalý link: http://hdl.handle.net/11104/0254344