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Lennholm M, Carvalho I, Cave-Ayland K, Chagnard A, Challis C, Felton R, Frigione D, Garzotti L, Goodyear A, Graves J, Guillemaut C, Harrison J, Lerche E, Lomas P, Mooney R, Rimini F, Sips A, Sozzi C, Valcarcel D, Vega J. Real time control developments at JET in preparation for deuterium-tritium operation. FUSION ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.fusengdes.2017.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Graves JP, Chapman IT, Coda S, Johnson T, Lennholm M, Paley JI, Sauter O. Recent Advances in Sawtooth Control. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst11-a11695] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. P. Graves
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas Association EURATOM-Confédération Suisse, 1015 Lausanne, Switzerland
| | - I. T. Chapman
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, United Kingdom
| | - S. Coda
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas Association EURATOM-Confédération Suisse, 1015 Lausanne, Switzerland
| | - T. Johnson
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- Euratom-VR Association, EES, KTH, Stockholm, Sweden
| | - M. Lennholm
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- EFDA-JET CSU, Culham Science Centre, Abingdon, OX14 3DB, United Kingdom
| | - J. I. Paley
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas Association EURATOM-Confédération Suisse, 1015 Lausanne, Switzerland
| | - O. Sauter
- JET-EFDA, Culham Science Centre, OX14 3DB, Abingdon, United Kingdom
- École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas Association EURATOM-Confédération Suisse, 1015 Lausanne, Switzerland
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Lerche E, Lennholm M, Carvalho IS, Dumortier P, Durodie F, Van Eester D, Graves J, Jacquet P, Murari A. Sawtooth pacing with on-axis ICRH modulation in JET-ILW. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201715703029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Graves J, Chapman I, Coda S, Lennholm M, Albergante M, Jucker M. Control of magnetohydrodynamic stability by phase space engineering of energetic ions in tokamak plasmas. Nat Commun 2012; 3:624. [DOI: 10.1038/ncomms1622] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 11/29/2011] [Indexed: 11/09/2022] Open
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Lauret M, Felici F, Witvoet G, Goodman T, Vandersteen G, Westerhof E, Steinbuch M, Sauter O, de Baar M. A new mechanism for sawtooth period control. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123202008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Goodman TP, Felici F, Sauter O, Graves JP. Sawtooth pacing by real-time auxiliary power control in a tokamak plasma. PHYSICAL REVIEW LETTERS 2011; 106:245002. [PMID: 21770577 DOI: 10.1103/physrevlett.106.245002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Indexed: 05/31/2023]
Abstract
In the standard scenario of tokamak plasma operation, sawtooth crashes are the main perturbations that can trigger performance-degrading, and potentially disruption-generating, neoclassical tearing modes. This Letter demonstrates sawtooth pacing by real-time control of the auxiliary power. It is shown that the sawtooth crash takes place in a reproducible manner shortly after the removal of that power, and this can be used to precisely prescribe, i.e., pace, the individual sawteeth. In combination with preemptive stabilization of the neoclassical tearing modes, sawtooth pacing provides a new sawtooth control paradigm for improved performance in burning plasmas.
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Affiliation(s)
- T P Goodman
- Centre de Recherches en Physiques des Plasmas, Ecole Polytechnique Fédérale de Lausanne (CRPP-EPFL), Lausanne, Switzerland.
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