Observations on the W-transport in the core plasma of JET and ASDEX Upgrade

0421351 - ÚFP 2014 RIV GB eng J - Journal Article
Pütterich, T. - Dux, R. - Neu, R. - Bernert, M. - Beurskens, M.N.A. - Bobkov, V. - Brezinsek, S. - Challis, C. - Coenen, J.W. - Coffey, I. - Czarnecka, A. - Giroud, C. - Jacquet, P. - Joffrin, E. - Kallenbach, A. - Lehnen, M. - Lerche, E. - De La Luna, E. - Marsen, S. - Matthews, G. - Mayoral, M.-L. - McDermott, R.M. - Meigs, A. - Mlynář, Jan - Sertoli, M. - van Rooij, G. … Total 28 authors
Observations on the W-transport in the core plasma of JET and ASDEX Upgrade.
Plasma Physics and Controlled Fusion. Roč. 55, č. 12 (2013), s. 124036-124036. ISSN 0741-3335. E-ISSN 1361-6587.
[European Physical Society Conference on Plasma Physics/40./. Espoo, 01.07.2013-05.07.2013]
Institutional support: RVO:61389021
Keywords : tokamak * impurity transport * core plasma * fusion * tungsten * ASDEX Upgrade
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.386, year: 2013
http://iopscience.iop.org/0741-3335/55/12/124036/pdf/0741-3335_55_12_124036.pdf

The W-transport in the core plasma of JET is investigated experimentally by deriving the W-concentration profiles from the modelling of the signals of the soft x-ray cameras. The immediate correlation between the change of magnetohydrodymanic (MHD) and the removal of W from the plasma core supports the hypothesis that the change of the MHD activity is the underlying cause for the change of transport. Furthermore, a discharge from the ASDEX Upgrade is investigated. In this case the plasma profiles exhibit small changes only, while the most prominent change occurs in the W-content of the confined plasma caused by the reduction of the fuelling deuterium gas puff. Both case studies exemplify that small changes of the core parameters of a plasma may influence the W-transport in the plasma core drastically.
Permanent Link: http://hdl.handle.net/11104/0227684