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

K. K. Kirov; M. L. Mayoral; J. Mailloux; Yu Baranov; L. Colas; A. Ekedahl; K. Erents; M. Goniche; A. Korotkov; P. Morgan; V. Petrzilka; J. Ongena; K. Rantamäki; M. Stamp

doi:10.1088/0741-3335/51/4/044003

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

K. K. Kirov, M. L. Mayoral, J. Mailloux, Yu Baranov, L. Colas, A. Ekedahl, K. Erents, M. Goniche, A. Korotkov, P. Morgan, V. Petrzilka, J. Ongena, K. Rantamäki, M. Stamp

Laboratory for Plasma Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	044003
Journal	Plasma Physics and Controlled Fusion
Volume	51
Issue number	4
DOIs	https://doi.org/10.1088/0741-3335/51/4/044003
Publication status	Published - 2009

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Kirov, K. K., Mayoral, M. L., Mailloux, J., Baranov, Y., Colas, L., Ekedahl, A., Erents, K., Goniche, M., Korotkov, A., Morgan, P., Petrzilka, V., Ongena, J., Rantamäki, K., & Stamp, M. (2009). Effects of ICRF induced density modifications on LH wave coupling at JET. Plasma Physics and Controlled Fusion, 51(4), Article 044003. https://doi.org/10.1088/0741-3335/51/4/044003

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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.",

author = "Kirov, {K. K.} and Mayoral, {M. L.} and J. Mailloux and Yu Baranov and L. Colas and A. Ekedahl and K. Erents and M. Goniche and A. Korotkov and P. Morgan and V. Petrzilka and J. Ongena and K. Rantam{\"a}ki and M. Stamp",

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doi = "10.1088/0741-3335/51/4/044003",

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journal = "Plasma Physics and Controlled Fusion",

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T1 - Effects of ICRF induced density modifications on LH wave coupling at JET

AU - Kirov, K. K.

AU - Mayoral, M. L.

AU - Mailloux, J.

AU - Baranov, Yu

AU - Colas, L.

AU - Ekedahl, A.

AU - Erents, K.

AU - Goniche, M.

AU - Korotkov, A.

AU - Morgan, P.

AU - Petrzilka, V.

AU - Ongena, J.

AU - Rantamäki, K.

AU - Stamp, M.

PY - 2009

Y1 - 2009

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AB - 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.

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VL - 51

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 4

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ER -

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

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