| Issue |
EPJ Web Conf.
Volume 203, 2019
20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC20)
|
|
|---|---|---|
| Article Number | 03007 | |
| Number of page(s) | 7 | |
| Section | Diagnostics | |
| DOI | https://doi.org/10.1051/epjconf/201920303007 | |
| Published online | 25 March 2019 | |
https://doi.org/10.1051/epjconf/201920303007
ECE Diagnostic for the initial Operation of Wendelstein 7-X
1
Max-Planck-Institut für Plasmaphysik, Greifswald/Garching, Germany
2
Laboratorio Nacional de Fusion, CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain
3
Inst. für Grenzflächenverfahrenstechnik und Plasmatechnologie, Univ. Stuttgart, Germany
4
National Institute for Fusion Science, Toki, Japan
* Corresponding author: matthias.hirsch@ipp.mpg.de
Published online: 25 March 2019
The ECE diagnostic at W7-X in its standard mode of operation measures in X2 mode polarization with a 32 channel radiometer in the frequency band around 140 GHz for central magnetic field 2.5T. The radiometer is calibrated by a noise source and the overall system absolutely calibrated by means of a hot-cold source placed outside the torus in front of a Gaussian telescope optics with identical geometry and transmission line as it is installed for the measurements in the plasma vessel. The system is supplemented with a 16 channel zoom device with 4 GHz span for higher frequency resolution at a suitable radial range and a Michelson interferometer for the characterization of higher harmonics sharing the same line of sight.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/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.