Characterization of 3-strap antennas in ASDEX Upgrade

Volodymyr Bobkov; Roberto Bilato; Laurent Colas; Ralph Dux; Eric Faudot; Helmut Faugel; Helmut Fünfgelder; Albrecht Herrmann; Jonathan Jacquot; Arne Kallenbach; Daniele Milanesio; Riccardo Maggiora; Rudolf Neu; Jean-Marie Noterdaeme; Roman Ochoukov; Thomas Pütterich; Wouter Tierens; Wei Zhang

doi:10.1051/epjconf/201715703005

All issues

Volume 157 (2017)

EPJ Web Conf., 157 (2017) 03005

Abstract

Open Access

Issue		EPJ Web Conf. Volume 157, 2017 22 Topical Conference on Radio-Frequency Power in Plasmas


Article Number		03005
Number of page(s)		4
Section		Standard Papers
DOI		https://doi.org/10.1051/epjconf/201715703005
Published online		23 October 2017

EPJ Web of Conferences 157, 03005 (2017)
https://doi.org/10.1051/epjconf/201715703005

Characterization of 3-strap antennas in ASDEX Upgrade

Volodymyr Bobkov¹^*, Roberto Bilato¹, Laurent Colas², Ralph Dux¹, Eric Faudot³, Helmut Faugel¹, Helmut Fünfgelder¹, Albrecht Herrmann¹, Jonathan Jacquot¹, Arne Kallenbach¹, Daniele Milanesio⁴, Riccardo Maggiora⁴, Rudolf Neu¹^,5, Jean-Marie Noterdaeme¹^,6, Roman Ochoukov¹, Thomas Pütterich¹, Wouter Tierens¹, Wei Zhang, the ASDEX Upgrade Team¹^,6 and the EUROfusion MST1 Team ¹¹

¹ Max-Planck-Institut für Plasmaphysik, Boltzmannstr.2, 85748 Garching, Germany
² IRFM, CEA Cadarache, 13108 Saint Paul lez Durance, France
³ IJL UMR 7198, U. de Lorraine P2M, Fac. Des Sciences, BP 70239, F-54506 Vandœuvre Cedex, France
⁴ Politecnico di Torino, Torino, Italy
⁵ Technische Universität München, Boltzmannstr. 15, 85748 Garching, Germany
⁶ Applied Physics Department, University of Ghent, B-9000 Ghent, Belgium

^* Corresponding author: bobkov@ipp.mpg.de author

Published online: 23 October 2017

Abstract

The response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at f_ICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics.

¹¹

See H. Meyer et. al. Nuclear Fusion FEC 2016 Special issue (2017)

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.