Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar

Ana Kostic; Kristel Crombé; Ralph Dux; Michael Griener; Mari Usoltceva; Ilya Shesterikov; Elijah H. Martin; Jean Marie Noterdaeme

doi:10.1063/5.0013650

Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar

Ana Kostic, Kristel Crombé, Ralph Dux, Michael Griener, Mari Usoltceva, Ilya Shesterikov, Elijah H. Martin, Jean Marie Noterdaeme

Plasma Theory and Modeling

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

An important step in understanding the Radio Frequency sheaths in the vicinity of Ion Cyclotron antennas in magnetically confined fusion plasmas is to benchmark the existing theoretical models against real antenna operation. The data needed is the local DC electric field that develops in the sheaths surrounding the plasma-facing structures of the antenna. In this contribution we present our most recent progress on the development of a spectroscopic diagnostic, which delivers direct and local measurements of the electric field across the sheath. The method uses polarization spectroscopy where the electric fields are optically determined from the Stark shift of the emission spectra of excited helium atoms. The sheath electric fields obtained with this diagnostic scheme are measured in the vicinity of the ICRF antenna in IShTAR, a test facility designed to mimic the tokamak edge plasma parameters and focused on studying the ICRF antenna-plasma interaction.

Original language	English
Title of host publication	23rd Topical Conference on Radiofrequency Power in Plasmas
Editors	Paul T. Bonoli, Robert I. Pinsker, Xiaojie Wang
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735420137
DOIs	https://doi.org/10.1063/5.0013650
State	Published - Sep 16 2020
Event	23rd Topical Conference on Radiofrequency Power in Plasmas - Hefei, China Duration: May 14 2019 → May 17 2019

Publication series

Name	AIP Conference Proceedings
Volume	2254
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	23rd Topical Conference on Radiofrequency Power in Plasmas
Country/Territory	China
City	Hefei
Period	05/14/19 → 05/17/19

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 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

UN SDGs

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

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10.1063/5.0013650

Cite this

Kostic, A., Crombé, K., Dux, R., Griener, M., Usoltceva, M., Shesterikov, I., Martin, E. H., & Noterdaeme, J. M. (2020). Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar. In P. T. Bonoli, R. I. Pinsker, & X. Wang (Eds.), 23rd Topical Conference on Radiofrequency Power in Plasmas Article 50002 (AIP Conference Proceedings; Vol. 2254). American Institute of Physics Inc.. https://doi.org/10.1063/5.0013650

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title = "Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar",

abstract = "An important step in understanding the Radio Frequency sheaths in the vicinity of Ion Cyclotron antennas in magnetically confined fusion plasmas is to benchmark the existing theoretical models against real antenna operation. The data needed is the local DC electric field that develops in the sheaths surrounding the plasma-facing structures of the antenna. In this contribution we present our most recent progress on the development of a spectroscopic diagnostic, which delivers direct and local measurements of the electric field across the sheath. The method uses polarization spectroscopy where the electric fields are optically determined from the Stark shift of the emission spectra of excited helium atoms. The sheath electric fields obtained with this diagnostic scheme are measured in the vicinity of the ICRF antenna in IShTAR, a test facility designed to mimic the tokamak edge plasma parameters and focused on studying the ICRF antenna-plasma interaction.",

author = "Ana Kostic and Kristel Cromb{\'e} and Ralph Dux and Michael Griener and Mari Usoltceva and Ilya Shesterikov and Martin, {Elijah H.} and Noterdaeme, {Jean Marie}",

note = "Publisher Copyright: {\textcopyright} 2020 American Institute of Physics Inc.. All rights reserved.; 23rd Topical Conference on Radiofrequency Power in Plasmas ; Conference date: 14-05-2019 Through 17-05-2019",

year = "2020",

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day = "16",

doi = "10.1063/5.0013650",

language = "English",

series = "AIP Conference Proceedings",

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Kostic, A, Crombé, K, Dux, R, Griener, M, Usoltceva, M, Shesterikov, I, Martin, EH & Noterdaeme, JM 2020, Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar. in PT Bonoli, RI Pinsker & X Wang (eds), 23rd Topical Conference on Radiofrequency Power in Plasmas., 50002, AIP Conference Proceedings, vol. 2254, American Institute of Physics Inc., 23rd Topical Conference on Radiofrequency Power in Plasmas, Hefei, China, 05/14/19. https://doi.org/10.1063/5.0013650

Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar. / Kostic, Ana; Crombé, Kristel; Dux, Ralph et al.
23rd Topical Conference on Radiofrequency Power in Plasmas. ed. / Paul T. Bonoli; Robert I. Pinsker; Xiaojie Wang. American Institute of Physics Inc., 2020. 50002 (AIP Conference Proceedings; Vol. 2254).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Kostic, Ana

AU - Crombé, Kristel

AU - Dux, Ralph

AU - Griener, Michael

AU - Usoltceva, Mari

AU - Shesterikov, Ilya

AU - Martin, Elijah H.

AU - Noterdaeme, Jean Marie

PY - 2020/9/16

Y1 - 2020/9/16

N2 - An important step in understanding the Radio Frequency sheaths in the vicinity of Ion Cyclotron antennas in magnetically confined fusion plasmas is to benchmark the existing theoretical models against real antenna operation. The data needed is the local DC electric field that develops in the sheaths surrounding the plasma-facing structures of the antenna. In this contribution we present our most recent progress on the development of a spectroscopic diagnostic, which delivers direct and local measurements of the electric field across the sheath. The method uses polarization spectroscopy where the electric fields are optically determined from the Stark shift of the emission spectra of excited helium atoms. The sheath electric fields obtained with this diagnostic scheme are measured in the vicinity of the ICRF antenna in IShTAR, a test facility designed to mimic the tokamak edge plasma parameters and focused on studying the ICRF antenna-plasma interaction.

AB - An important step in understanding the Radio Frequency sheaths in the vicinity of Ion Cyclotron antennas in magnetically confined fusion plasmas is to benchmark the existing theoretical models against real antenna operation. The data needed is the local DC electric field that develops in the sheaths surrounding the plasma-facing structures of the antenna. In this contribution we present our most recent progress on the development of a spectroscopic diagnostic, which delivers direct and local measurements of the electric field across the sheath. The method uses polarization spectroscopy where the electric fields are optically determined from the Stark shift of the emission spectra of excited helium atoms. The sheath electric fields obtained with this diagnostic scheme are measured in the vicinity of the ICRF antenna in IShTAR, a test facility designed to mimic the tokamak edge plasma parameters and focused on studying the ICRF antenna-plasma interaction.

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Direct local electric field measurements in the sheaths of the ICRF antenna in ishtar

Abstract

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UN SDGs

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