| Issue |
EPJ Web Conf.
Volume 157, 2017
22 Topical Conference on Radio-Frequency Power in Plasmas
|
|
|---|---|---|
| Article Number | 03026 | |
| Number of page(s) | 5 | |
| Section | Standard Papers | |
| DOI | https://doi.org/10.1051/epjconf/201715703026 | |
| Published online | 23 October 2017 | |
https://doi.org/10.1051/epjconf/201715703026
Electromagnetic simulations of JET ICRF ITER-like antenna with TOPICA and SSWICH asymptotic codes
1 LPP-ERM/KMS, Royal Military Academy, 30 Avenue de la Renaissance B-1000, Brussels, Belgium
2 Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany
3 IRFM CEA, Cadarache F-13108 Saint Paul lez Durance, France
4 CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, UK
5 Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
6 Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
* Corresponding author: alena.krivska@rma.ac.be
Published online: 23 October 2017
Multi-megawatt Ion Cyclotron Range of Frequencies (ICRF) heating is routinely used in the JET tokamak. To increase the ICRF heating power available from the A2 antennas, the ICRF ITER-Like Antenna (ILA) was reinstalled for the 2015 JET ITER-like wall experimental campaign. The application of high levels of ICRF power typically results in increased plasma wall interaction which leads to the observation of enhanced influx of metallic impurities in the plasma edge. It is assumed that the impurity production is mainly driven by the parallel component of the Radio-Frequency (RF) antenna electric near-field, E// (parallel to the confinement magnetic field of the tokamak), that is rectified in a thin boundary layer (RF sheath). Torino Polytechnic Ion Cyclotron Antenna (TOPICA) code was used to compute E// field maps in front of the ILA and between its poloidal limiters in the presence of plasma using measured density profiles and various antenna feedings. E// field maps calculated between the poloidal limiters were used to estimate the poloidal distribution of RF-sheath Direct Current (DC) potential in this private region of the ILA and make relative comparison of various antenna electrical settings. For this purpose we used the asymptotic version of the Self-consistent Sheaths and Waves for Ion Cyclotron Heating Slow-Wave (SSWICH-SW) code. These estimations can help to study the formation of RF sheaths around the antenna and even at distant locations (∼3m away).
© The authors, published by EDP Sciences, 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.