Effects of ICRF induced density modifications on LH wave coupling at JET

K.K. Kirov, M-L. Mayoral, J. Mailloux, Yu Baranov, Karin Rantamäki, JET-EFDA collaborators

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Abstract

Lower hybrid (LH) wave coupling is modified and usually degraded when the system is powered simultaneously with the ion cyclotron range of frequency (ICRF) antennas magnetically connected to the launcher. This has been attributed to scrape-off layer density modifications by the RF sheaths. LH reflection coefficients dependences on various parameters are investigated and shown to be consistent with RF sheath physics. Gas puffing near the launcher has been used to improve the coupling of LH waves.
Original languageEnglish
Article number044003
JournalPlasma Physics and Controlled Fusion
Volume51
Issue number4
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

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Kirov, K. K., Mayoral, M-L., Mailloux, J., Baranov, Y., Rantamäki, K., & JET-EFDA collaborators (2009). Effects of ICRF induced density modifications on LH wave coupling at JET. Plasma Physics and Controlled Fusion, 51(4), [044003]. https://doi.org/10.1088/0741-3335/51/4/044003