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

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 - Oct 23 2017
Externally published	Yes
Event	22nd Topical Conference on Radio-Frequency Power in Plasmas 2017 - Aix en Provence, France Duration: May 30 2017 → Jun 2 2017

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
Horizon 2020 Framework Programme
H2020 Euratom	633053

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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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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VL - 157

JO - EPJ Web of Conferences

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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

Abstract

Funding

UN SDGs

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