1
|
Affiliation(s)
- X. Litaudon
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | | |
Collapse
|
2
|
Affiliation(s)
- X. Litaudon
- CEA, IRFM, F-13108 St-Paul-Lez-Durance, France
| |
Collapse
|
3
|
Giruzzi G, Bourdelle C, Hoang GT, Imbeaux F, Litaudon X, Maget P, Peysson Y. Physics of Discharges with Vanishing Loop Voltage. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-a9184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- G. Giruzzi
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - C. Bourdelle
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - G. T. Hoang
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - F. Imbeaux
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - X. Litaudon
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - P. Maget
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - Y. Peysson
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| |
Collapse
|
4
|
Gormezano C, Challis CD, Joffrin E, Litaudon X, Sips ACC. Chapter 4: Advanced Tokamak Scenario Development at JET. Fusion Science and Technology 2017. [DOI: 10.13182/fst08-a1744] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - C. D. Challis
- Euratom/UKAEA Fusion Association Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - E. Joffrin
- Association Euratom-CEA CEA/DSM/DRFC Centre de Cadarache, 13108 St Paul lez Durance, France
| | - X. Litaudon
- Association Euratom-CEA CEA/DSM/DRFC Centre de Cadarache, 13108 St Paul lez Durance, France
| | - A. C. C. Sips
- Max-Planck-Institut für Plasmaphysik, Euratom-Association IPP, D-85740 Garching, Germany
| |
Collapse
|
5
|
Yang HL, Kwak JG, Oh YK, Park KR, Kim WC, Lee SG, Kim JY, Bae YS, Park YM, Kim HK, Chu Y, Park MK, Kim JS, In SR, Joung SH, Choe WH, Park HK, Hwang YS, Na YS, Park JG, Ahn JW, Park YS, Kwon M, Leuer JA, Eidietis NW, Hyatt AW, Walker M, Gorelov Y, Lohr J, Mueller D, Grisham LR, Sabbagh SA, Watanabe K, Inoue T, Sakamoto K, Oda Y, Kajiwara K, Ellis R, Hosea J, Delpech L, Hoang TT, Litaudon X, Namkung W, Cho MH. Overview of KSTAR Results in Phase-I Operation. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a19130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. L. Yang
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - J. G. Kwak
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - Y. K. Oh
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - K. R. Park
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - W. C. Kim
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - S. G. Lee
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - J. Y. Kim
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - Y. S. Bae
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - Y. M. Park
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - H. K. Kim
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - Y. Chu
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - M. K. Park
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - J. S. Kim
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - S. R. In
- Korea Atomic Energy Research Insititute, Daeduk-Daero 989-111, Yuseong-gu, Daejeon, 305-353, Korea
| | - S. H. Joung
- Korea Atomic Energy Research Insititute, Daeduk-Daero 989-111, Yuseong-gu, Daejeon, 305-353, Korea
| | - W. H. Choe
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - H. K. Park
- Pohang Univ. of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk, 790-784, Korea
| | - Y. S. Hwang
- Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea
| | - Y. S. Na
- Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea
| | - J. G. Park
- Princeton Plasma Physics Lab., P.O. Box 451 Princetorn, NJ 08543-0451, USA
| | - J. W. Ahn
- Oak Ridge National Lab., 1 Bethal Valley Rd, OakRidge, TN37831, USA
| | - Y. S. Park
- Columbia Univ., James Forrestal Campus (EWA 244), P.O. Box 451, Princeton, NJ 08543, USA
| | - M. Kwon
- National Fusion Research Institute, 113 Gwahangno, Yusung-Gu, Daejeon, 305-333, Korea
| | - J. A. Leuer
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - N. W. Eidietis
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - A. W. Hyatt
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - M. Walker
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - Y. Gorelov
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - J. Lohr
- General Atomics, 3550 General Atomics Court, San Diego, CA 92121, USA
| | - D. Mueller
- Princeton Plasma Physics Lab., P.O. Box 451 Princetorn, NJ 08543-0451, USA
| | - L. R. Grisham
- Princeton Plasma Physics Lab., P.O. Box 451 Princetorn, NJ 08543-0451, USA
| | - S. A. Sabbagh
- Columbia Univ., James Forrestal Campus (EWA 244), P.O. Box 451, Princeton, NJ 08543, USA
| | - K. Watanabe
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-city, Ibaraki-ken, 311-0193, Japan
| | - T. Inoue
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-city, Ibaraki-ken, 311-0193, Japan
| | - K. Sakamoto
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-city, Ibaraki-ken, 311-0193, Japan
| | - Y. Oda
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-city, Ibaraki-ken, 311-0193, Japan
| | - K. Kajiwara
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka-city, Ibaraki-ken, 311-0193, Japan
| | - R. Ellis
- Princeton Plasma Physics Lab., P.O. Box 451 Princetorn, NJ 08543-0451, USA
| | - J. Hosea
- Princeton Plasma Physics Lab., P.O. Box 451 Princetorn, NJ 08543-0451, USA
| | - L. Delpech
- CEA, IFRM,13108 Saint-Paul-Lez-Durance, France
| | - T. T. Hoang
- CEA, IFRM,13108 Saint-Paul-Lez-Durance, France
| | - X. Litaudon
- CEA, IFRM,13108 Saint-Paul-Lez-Durance, France
| | - W. Namkung
- Pohang Univ. of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk, 790-784, Korea
| | - M. H. Cho
- Pohang Univ. of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk, 790-784, Korea
| | | |
Collapse
|
6
|
Park S, Bae YS, Kim JH, Do H, Kim HT, Kim KM, Kim HK, Kim HJ, Han WS, Yang HL, Kwak JG, Namkung W, Cho MH, Park H, Delpech L, Hillairet J, Magne R, Hoang GT, Litaudon X, Wallace G, Shiraiwa S, Vieira R, Doody J. Progress of KSTAR 5-GHz Lower Hybrid Current Drive System. Fusion Science and Technology 2017. [DOI: 10.13182/fst12-493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Park
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - Y. S. Bae
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - J. H. Kim
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. Do
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. T. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - K. M. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. K. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. J. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - W. S. Han
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. L. Yang
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - J. G. Kwak
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - W. Namkung
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - M. H. Cho
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. Park
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - L. Delpech
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - J. Hillairet
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - R. Magne
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - G. T. Hoang
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - X. Litaudon
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - G. Wallace
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - S. Shiraiwa
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - R. Vieira
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - J. Doody
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| |
Collapse
|
7
|
Horton L, Batistoni P, Boyer H, Challis C, Ćirić D, Donné A, Eriksson LG, Garcia J, Garzotti L, Gee S, Hobirk J, Joffrin E, Jones T, King D, Knipe S, Litaudon X, Matthews G, Monakhov I, Murari A, Nunes I, Riccardo V, Sips A, Warren R, Weisen H, Zastrow KD. JET experiments with tritium and deuterium–tritium mixtures. Fusion Engineering and Design 2016. [DOI: 10.1016/j.fusengdes.2016.01.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
8
|
Donné AJH, Cowley S, Jones T, Litaudon X. Risk Mitigation for ITER by a Prolonged and Joint International Operation of JET. J Fusion Energ 2015. [DOI: 10.1007/s10894-015-0009-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
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). Rev Sci Instrum 2014; 85:11E301. [PMID: 25430306 DOI: 10.1063/1.4890247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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
| |
Collapse
|
10
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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
| |
Collapse
|
11
|
Mirizzi F, Ceccuzzi S, Meschino S, Artaud J, Belo J, Berger-By G, Bernard J, Cardinali A, Castaldo C, Cesario R, Decker J, Delpech L, Ekedahl A, Garcia J, Garibaldi P, Goniche M, Guilhem D, Hoang G, Jia H, Huang Q, Hillairet J, Imbeaux F, Kazarian F, Kim S, Litaudon X, Maggiora R, Magne R, Marfisi L, Milanesio D, Namkung W, Pajewski L, Panaccione L, Peysson Y, Sharma P, Schettini G, Schneider M, Tuccillo A, Tudisco O, Vecchi G, Villari R, Vulliez K, Bae Y. Contribution to the design of the main transmission line for the ITER relevant LHCD system. Fusion Engineering and Design 2011. [DOI: 10.1016/j.fusengdes.2011.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Bottollier-Curtet H, Champeaux S, Gouard P, Primout M, Bécoulet A, Litaudon X, Magne R. Ferroelectric materials and metamaterials for a new approach to ITER–ICRH loads. Fusion Engineering and Design 2011. [DOI: 10.1016/j.fusengdes.2010.12.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Romanelli F, Paméla J, Kamendje R, Watkins M, Brezinsek S, Liang Y, Litaudon X, Loarer T, Moreau D, Mazon D, Saibene G, Sartori F, de Vries P. Recent contribution of JET to the ITER physics. Fusion Engineering and Design 2009. [DOI: 10.1016/j.fusengdes.2008.11.088] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
14
|
Giruzzi G, Imbeaux F, Ségui JL, Garbet X, Huysmans G, Artaud JF, Bécoulet A, Hoang GT, Litaudon X, Maget P, Saoutic B. New tokamak plasma regime with stationary temperature oscillations. Phys Rev Lett 2003; 91:135001. [PMID: 14525311 DOI: 10.1103/physrevlett.91.135001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2003] [Indexed: 05/24/2023]
Abstract
During noninductively driven discharges in the Tore Supra tokamak, steady sinusoidal oscillations of the central electron temperature, lasting as long as 2 min, have been observed for the first time. Having no helical structure, they cannot be ascribed to any known MHD instability. The most plausible explanation of this new phenomenon is that the plasma current density and the electron temperature evolve as a nonlinearly coupled predator-prey system. This interpretation is supported by the numerical solution of coupled resistive current diffusion and heat transport equations.
Collapse
Affiliation(s)
- G Giruzzi
- Association Euratom-CEA, CEA/DSM/DRFC, CEA/Cadarache, 13108 St. Paul-lez-Durance, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Riva M, Zabeo L, Joffrin E, Mazon D, Moreau D, Murari A, Felton R, Guenther K, Litaudon X, Sartori F, Taliercio C, Tresset G. Real time safety factor profile determination in JET. Fusion Engineering and Design 2003. [DOI: 10.1016/s0920-3796(03)00310-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Eriksson LG, Fourment C, Fuchs V, Litaudon X, Challis CD, Crisanti F, Esposito B, Garbet X, Giroud C, Hawkes N, Maget P, Mazon D, Tresset G. Discharges in the JET tokamak where the safety factor profile is identified as the critical factor for triggering internal transport barriers. Phys Rev Lett 2002; 88:145001. [PMID: 11955153 DOI: 10.1103/physrevlett.88.145001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2000] [Revised: 11/28/2001] [Indexed: 05/23/2023]
Abstract
Joint European Torus discharges which demonstrate the critical role the safety factor profile, q, can play in the formation of internal transport barriers (ITB) are examined. In these discharges, the target parameters, including the E x B flows, were kept virtually the same, except for the q profile. In a discharge with a nonmonotonic q, an ITB was triggered whereas a discharge with monotone q made no such transition. Thus, there is strong evidence that the q profile was the critical factor for the triggering of an ITB. Possible interpretations of this finding are discussed.
Collapse
Affiliation(s)
- L-G Eriksson
- Association EURATOM-CEA sur la Fusion Contrôlée, CEA Cadarache, F-13108 St. Paul lez Durance, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Crisanti F, Litaudon X, Mailloux J, Mazon D, Barbato E, Baranov Y, Bécoulet A, Bécoulet M, Challis CD, Conway GD, Dux R, Eriksson LG, Esposito B, Frigione D, Hennequin P, Giroud C, Hawkes N, Huysmans G, Imbeaux F, Joffrin E, Lomas P, Lotte P, Maget P, Mantsinen M, Moreau D, Rimini F, Riva M, Sarazin Y, Tresset G, Tuccillo AA, Zastrow KD. JET quasistationary internal-transport-barrier operation with active control of the pressure profile. Phys Rev Lett 2002; 88:145004. [PMID: 11955156 DOI: 10.1103/physrevlett.88.145004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2001] [Indexed: 05/23/2023]
Abstract
Quasistationary operation has been achieved on the Joint European Torus tokamak in internal-transport-barrier (ITB) scenarios, with the discharge time limited only by plant constraints. Full current drive was obtained over all the high performance phase by using lower hybrid current drive. For the first time feedback control on the total pressure and on the electron temperature profile was implemented by using, respectively, the neutral beams and the ion-cyclotron waves. Although impurity accumulation could be a problem in steady state ITBs, these experiments bring some elements to answer to it.
Collapse
Affiliation(s)
- F Crisanti
- Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche Frascati, C.P. 65, 00044 Frascati, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Huysmans GT, Hender TC, Hawkes NC, Litaudon X. MHD stability of advanced tokamak scenarios with reversed central current: an explanation of the "current hole". Phys Rev Lett 2001; 87:245002. [PMID: 11736509 DOI: 10.1103/physrevlett.87.245002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2001] [Indexed: 05/23/2023]
Abstract
A region of zero current density in the plasma center has been observed in the advanced tokamak scenarios with off-axis lower-hybrid current drive in the JET and JT-60U tokamak experiments. Significantly, the central current density does not become negative, although this is expected based on conventional current diffusion. In this paper, it is shown that the zero central current density and the absence of negative central current can be explained by the influence of a resistive kink magnetohydrodynamic instability.
Collapse
Affiliation(s)
- G T Huysmans
- Association Euratom-CEA, Cadarache, F13108, France
| | | | | | | |
Collapse
|
19
|
|
20
|
Kupfer K, Moreau D, Litaudon X. Statistical theory of wave propagation and multipass absorption for current drive in tokamaks. ACTA ACUST UNITED AC 1993. [DOI: 10.1063/1.860557] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|