Characterization of 3-strap antennas in ASDEX Upgrade

Volodymyr Bobkov; Roberto Bilato; Laurent Colas; Ralph Dux; Eric Faudot; Helmut Faugel; Helmut Fünfgelder; Albrecht Herrmann; Jonathan Jacquot; Arne Kallenbach; Daniele Milanesio; Riccardo Maggiora; Rudolf Neu; Jean Marie Noterdaeme; Roman Ochoukov; Thomas Pütterich; Wouter Tierens; Wei Zhang

doi:10.1051/epjconf/201715703005

Characterization of 3-strap antennas in ASDEX Upgrade

Volodymyr Bobkov, Roberto Bilato, Laurent Colas, Ralph Dux, Eric Faudot, Helmut Faugel, Helmut Fünfgelder, Albrecht Herrmann, Jonathan Jacquot, Arne Kallenbach, Daniele Milanesio, Riccardo Maggiora, Rudolf Neu, Jean Marie Noterdaeme, Roman Ochoukov, Thomas Pütterich, Wouter Tierens, Wei Zhang

Associate Professorship of Plasma-Material-Wechselwirkung

Research output: Contribution to journal › Conference article › peer-review

13 Scopus citations

Abstract

The response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at f_ICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics.

Original language	English
Article number	03005
Journal	EPJ Web of Conferences
Volume	157
DOIs	https://doi.org/10.1051/epjconf/201715703005
State	Published - 23 Oct 2017
Event	22nd Topical Conference on Radio-Frequency Power in Plasmas 2017 - Aix en Provence, France Duration: 30 May 2017 → 2 Jun 2017

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Bobkov, V., Bilato, R., Colas, L., Dux, R., Faudot, E., Faugel, H., Fünfgelder, H., Herrmann, A., Jacquot, J., Kallenbach, A., Milanesio, D., Maggiora, R., Neu, R., Noterdaeme, J. M., Ochoukov, R., Pütterich, T., Tierens, W., & Zhang, W. (2017). Characterization of 3-strap antennas in ASDEX Upgrade. EPJ Web of Conferences, 157, Article 03005. https://doi.org/10.1051/epjconf/201715703005

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title = "Characterization of 3-strap antennas in ASDEX Upgrade",

abstract = "The response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at fICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics.",

author = "Volodymyr Bobkov and Roberto Bilato and Laurent Colas and Ralph Dux and Eric Faudot and Helmut Faugel and Helmut F{\"u}nfgelder and Albrecht Herrmann and Jonathan Jacquot and Arne Kallenbach and Daniele Milanesio and Riccardo Maggiora and Rudolf Neu and Noterdaeme, {Jean Marie} and Roman Ochoukov and Thomas P{\"u}tterich and Wouter Tierens and Wei Zhang",

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doi = "10.1051/epjconf/201715703005",

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T1 - Characterization of 3-strap antennas in ASDEX Upgrade

AU - Bobkov, Volodymyr

AU - Bilato, Roberto

AU - Colas, Laurent

AU - Dux, Ralph

AU - Faudot, Eric

AU - Faugel, Helmut

AU - Fünfgelder, Helmut

AU - Herrmann, Albrecht

AU - Jacquot, Jonathan

AU - Kallenbach, Arne

AU - Milanesio, Daniele

AU - Maggiora, Riccardo

AU - Neu, Rudolf

AU - Noterdaeme, Jean Marie

AU - Ochoukov, Roman

AU - Pütterich, Thomas

AU - Tierens, Wouter

AU - Zhang, Wei

PY - 2017/10/23

Y1 - 2017/10/23

N2 - The response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at fICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics.

AB - The response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at fICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics.

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DO - 10.1051/epjconf/201715703005

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AN - SCOPUS:85032643033

SN - 2101-6275

VL - 157

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 03005

T2 - 22nd Topical Conference on Radio-Frequency Power in Plasmas 2017

Y2 - 30 May 2017 through 2 June 2017

ER -

Characterization of 3-strap antennas in ASDEX Upgrade

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