@inproceedings{7e2c7247df8942b6beb1432cdf68daa6,
title = "Analysis of ICRH antenna loading data in TEXTOR obtained during gas injection experiments",
abstract = "The possibility of increasing the coupling of ICRH power to plasmas on TEXTOR by gas injection was investigated, for a given voltage applied at the input of an antenna pair. The antenna pair was operated in the conjugated T mode, D(H) heating was used. Modeling of the antenna by transmission line theory shows that load resilience is maintained in a broad range of independent resistance variation for each strap. It is found that the absolute value of the reflection coefficient can be maintained below 0.2 for typical values of resistance measured in plasma shots (2-10 Ω/m) in good matching conditions. During gas injection, the loading resistance showed a clear increase with increasing line average electron density measured close to the plasma edge. Evidence of fast wave eigenmodes was also found, as characteristic resonant behavior of loading resistance and antenna self-inductance, due to poor absorption in the plasma caused by high H minority concentration.",
keywords = "ICRH, TEXTOR, antenna, fast wave coupling, impedance matching",
author = "I. Stepanov and {Van Wassenhove}, G. and P. Dumortier and R. Koch and A. Messiaen and M. Vervier and S. Brezinsek and A. Kr{\"a}mer-Flecken and O. Schmitz",
year = "2011",
doi = "10.1063/1.3664934",
language = "English",
isbn = "9780735409781",
series = "AIP Conference Proceedings",
pages = "85--88",
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",
}