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Ekedahl A, Goniche M, Guilhem D, Kazarian F, Peysson Y. Lower Hybrid Current Drive in Tore Supra. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst09-a9172] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Ekedahl
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - M. Goniche
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - D. Guilhem
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - F. Kazarian
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - Y. Peysson
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
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Delpech L, Achard J, Armitano A, Berger-By G, Ekedahl A, Gargiulo L, Goniche M, Guilhem D, Hertout P, Hillairet J, Magne R, Mollard P, Piluso P, Poli S, Prou M, Saille A, Samaille F. Evolution of the Tore Supra Lower Hybrid Current Drive System for WEST. FUSION ENGINEERING AND DESIGN 2015. [DOI: 10.1016/j.fusengdes.2015.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Klepper CC, Martin EH, Isler RC, Colas L, Goniche M, Hillairet J, Panayotis S, Pegourié B, Jacquot J, Lotte P, Colledani G, Biewer TM, Caughman JB, Ekedahl A, Green DL, Harris JH, Hillis DL, Shannon SC, Litaudon X. Probing the plasma near high power wave launchers in fusion devices for static and dynamic electric fields (invited). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:11E301. [PMID: 25430306 DOI: 10.1063/1.4890247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An exploratory study was carried out in the long-pulse tokamak Tore Supra, to determine if electric fields in the plasma around high-power, RF wave launchers could be measured with non-intrusive, passive, optical emission spectroscopy. The focus was in particular on the use of the external electric field Stark effect. The feasibility was found to be strongly dependent on the spatial extent of the electric fields and overlap between regions of strong (>∼1 kV/cm) electric fields and regions of plasma particle recycling and plasma-induced, spectral line emission. Most amenable to the measurement was the RF electric field in edge plasma, in front of a lower hybrid heating and current drive launcher. Electric field strengths and direction, derived from fitting the acquired spectra to a model including time-dependent Stark effect and the tokamak-range magnetic field Zeeman-effect, were found to be in good agreement with full-wave modeling of the observed launcher.
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Affiliation(s)
- C C Klepper
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - E H Martin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - R C Isler
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - L Colas
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - M Goniche
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - J Hillairet
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - S Panayotis
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - B Pegourié
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - J Jacquot
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - Ph Lotte
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - G Colledani
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - T M Biewer
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - J B Caughman
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - A Ekedahl
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - D L Green
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - J H Harris
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - D L Hillis
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA
| | - S C Shannon
- North Carolina State University, Raleigh, North Carolina 27607, USA
| | - X Litaudon
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
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Klepper CC, Isler RC, Hillairet J, Martin EH, Colas L, Ekedahl A, Goniche M, Harris JH, Hillis DL, Panayotis S, Pegourié B, Lotte P, Colledani G, Martin V. Dynamic Stark spectroscopic measurements of microwave electric fields inside the plasma near a high-power antenna. PHYSICAL REVIEW LETTERS 2013; 110:215005. [PMID: 23901403 DOI: 10.1103/physrevlett.110.215005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fully dynamic Stark effect visible spectroscopy was used for the first time to directly measure the local rf electric field in the boundary plasma near a high-power antenna in high-performance, magnetically confined, fusion energy experiment. The measurement was performed in the superconducting tokamak Tore Supra, in the near field of a 1–3 MW, lower-hybrid, 3.7 GHz wave-launch antenna, and combined with modeling of neutral atom transport to estimate the local rf electric field amplitude (as low as 1–2 kV/cm) and direction in this region. The measurement was then shown to be consistent with the predicted values from a 2D full-wave propagation model. Notably the measurement confirmed that the electric field direction deviates substantially from the direction in which it is launched by the waveguides as it penetrates only a few cm radially inward into the plasma from the waveguides, consistent with the model.
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Affiliation(s)
- C C Klepper
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA.
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Goniche M, Frincu B, Ekedahl A, Petržílka V, Berger-By G, Hillairet J, Litaudon X, Preynas M, Voyer D. Experimental Investigation of Nonlinear Coupling of Lower Hybrid Waves on Tore Supra. FUSION SCIENCE AND TECHNOLOGY 2012. [DOI: 10.13182/fst12-a14623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Goniche
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - B. Frincu
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - A. Ekedahl
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - V. Petržílka
- Association IPP.CR, 182 21 Praha 8, Czech Republic
| | - G. Berger-By
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - J. Hillairet
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - X. Litaudon
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - M. Preynas
- CEA, IRFM, F-13108 Saint Paul-lez-Durance, France
| | - D. Voyer
- Université de Lyon, Ecole Centrale de Lyon, Laboratoire Ampère (UMR CNRS 5005), Ecully, France
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Portafaix C, Catherineau M, Guilhem D, Saille A. 3D electromagnetic analyses during plasma disruption for the Tore Supra lower hybrid passive active multi-junction launcher. FUSION ENGINEERING AND DESIGN 2011. [DOI: 10.1016/j.fusengdes.2011.02.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sharma P, Rao S, Ramella K, Bora D. Design, fabrication and testing of UHV compatible high power RF devices for lower hybrid current drive system on SST-1 tokamak. FUSION ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.fusengdes.2007.12.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Barana O, Basiuk V, Ducobu L, Laborde L, Mazon D, Moreau P, Saint-Laurent F. Integration of advanced feedback control techniques on Tore Supra. FUSION ENGINEERING AND DESIGN 2007. [DOI: 10.1016/j.fusengdes.2007.05.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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