@inproceedings{9f2774c5394c45ef92be3dce17a92c3c,
title = "Detailed modeling of grounding solutions for the ITER ICRF antenna",
abstract = "The excitation of non-TEM modes around the ITER ICRF antenna plug can considerably increase the level of RF voltages and currents on the ITER plug. First study of these modes and a solution to avoid them in the ITER ion cyclotron range of frequencies were reported in [1]. In this work a detailed analysis of electrical properties of the ITER ICRF antenna with the plug was studied for different grounding solutions with CST Microwave Studio{\textregistered} [2]. Conclusions of an earlier work [ 1 ] were confirmed on the detailed model of the antenna with the plug. Different grounding contacts (capacitive, galvanic and mixed capacitive-galvanic) as well as their distribution inside the plug gap were analyzed. It was shown that capacitive and mixed capacitive-galvanic grounding are less effective because they demand high values of the capacitance and are more sensitive to the frequency and antenna spectrum. In particular a galvanic grounding realized by the contacts put around the perimeter of the plug gap at lm behind the front face of the antenna is the most suitable solution from the electromagnetic point of view. An optimization of the layout and arrangement of the contacts in order to assess and optimize the current distribution on them is under way. Measurements on a scaled mock-up of the complete antenna and the plug are under way for modeling results confirmation.",
keywords = "ICRH, ITER, RF antenna, grounding",
author = "V. Kyrytsya and P. Dumortier and A. Messiaen and F. Louche and F. Durodi{\'e}",
year = "2011",
doi = "10.1063/1.3664925",
language = "English",
isbn = "9780735409781",
series = "AIP Conference Proceedings",
pages = "45--48",
booktitle = "Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference",
note = "19th Topical Conference on Radio Frequency Power in Plasmas ; Conference date: 01-06-2011 Through 03-07-2011",
}