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Title: Progress in disruption prevention for ITER

Abstract

Key plasma physics and real-time control elements needed for robustly stable operation of high fusion power discharges in ITER have been displayed in recent research worldwide. Recent analysis has identified the current density profile as the main drive for disruptive instabilities in discharges simulating ITER's baseline scenario with high and low external torque. Ongoing development of model-based profile control and active control of magnetohydrodynamic instabilities is improving the stability of multiple scenarios. Significant advances have been made toward real-time physics-based prediction of instabilities, including path-oriented analysis, active sensing, and machine learning techniques for prediction that are beginning to go beyond simple disruption mitigation trigger applications. Active intervention adds to prevention of disruptions, including forced rotation of magnetic islands to prevent wall locking, and localized heating/current drive to shrink the islands. Stable discharge rampdowns have been achieved with the fastest ITER-like scaled current ramp rates, while maintaining an X-point configuration. These elements are being integrated into stable operating scenarios and new event-handling systems for off-normal events in order to develop the physics basis and techniques for robust control in ITER.

Authors:
 [1]; ORCiD logo [1];  [2];  [3];  [1];  [4]; ORCiD logo [1];  [5];  [3];  [6];  [1];  [7];  [8];  [9];  [1];  [4];  [10]; ORCiD logo [11]; ORCiD logo [12];  [11] more »;  [11]; ORCiD logo [13];  [12]; ORCiD logo [11]; ORCiD logo [5];  [3];  [9];  [14]; ORCiD logo [9];  [15];  [3];  [1]; ORCiD logo [11];  [14]; ORCiD logo [16] « less
  1. General Atomics, San Diego, CA (United States)
  2. Euratom-ENEA Association, Padova (Italy)
  3. Columbia Univ., New York, NY (United States)
  4. ITER Organization, St. Paul Lez Durance (France)
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. National Fusion Research Inst., Daejeon (Republic of Korea)
  8. Princeton Univ., NJ (United States)
  9. Ecole Polytechnique Federale Lausanne (Switzlerland)
  10. Culham Centre for Fusion Energy (CCFE), Abingdon (United Kingdom)
  11. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  12. Max Planck Inst. fur Plasmaphysik, Garching (Germany)
  13. Universita' degli Studi di Cagliari. Cagliari (Italy)
  14. Lehigh Univ., Bethlehem, PA (United States)
  15. Inst. of Plasma Physics (IFP), Milan (Italy)
  16. Chinese Academy of Sciences, Hefei, Anhui (China). Hefei Inst. of Physical Sciences
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); General Atomics, San Diego, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Columbia Univ., New York, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1508614
Grant/Contract Number:  
633053; AC02-09CH11466; AC52-07NA27344; FC02-04ER54698; FC02-99ER54512; FG02-04ER54761; FG02-99ER54524; FOA-0001498; SC0008520; SC0010492; SC0010720; SC0014264; SC0015878; SC0016372
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Name: Nuclear Fusion; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English

Citation Formats

Strait, E. J., Barr, Jayson L., Baruzzo, Matteo, Berkery, John, Buttery, Richard J., de Vries, Peter C., Eidietis, Nicholas W., Granetz, Robert, Hanson, Jeremy M., Holcomb, Chris T., Humphreys, Dave A., Kim, Jayhyun, Kolemen, Egemen, Kong, Mengdi, Lanctot, Matthew J., Lehnen, Michael, Lerche, Ernesto, Logan, Nikolas, Maraschek, Marc, Okabayashi, Michio, Park, Jong-Kyu, Pau, Alessandro, Pautasso, Gabriella, Poli, Francesca M., Rea, Cristina, Sabbagh, Steve A., Sauter, Olivier, Schuster, Eugenio, Sheikh, Umar Ahmed, Sozzi, Carlo, Turco, Francesca, Turnbull, Alan D., Wang, Zhirui, Wehner, Will P., and Zeng, Long. Progress in disruption prevention for ITER. United States: N. p., 2019. Web. doi:10.1088/1741-4326/ab15de.
Strait, E. J., Barr, Jayson L., Baruzzo, Matteo, Berkery, John, Buttery, Richard J., de Vries, Peter C., Eidietis, Nicholas W., Granetz, Robert, Hanson, Jeremy M., Holcomb, Chris T., Humphreys, Dave A., Kim, Jayhyun, Kolemen, Egemen, Kong, Mengdi, Lanctot, Matthew J., Lehnen, Michael, Lerche, Ernesto, Logan, Nikolas, Maraschek, Marc, Okabayashi, Michio, Park, Jong-Kyu, Pau, Alessandro, Pautasso, Gabriella, Poli, Francesca M., Rea, Cristina, Sabbagh, Steve A., Sauter, Olivier, Schuster, Eugenio, Sheikh, Umar Ahmed, Sozzi, Carlo, Turco, Francesca, Turnbull, Alan D., Wang, Zhirui, Wehner, Will P., & Zeng, Long. Progress in disruption prevention for ITER. United States. doi:10.1088/1741-4326/ab15de.
Strait, E. J., Barr, Jayson L., Baruzzo, Matteo, Berkery, John, Buttery, Richard J., de Vries, Peter C., Eidietis, Nicholas W., Granetz, Robert, Hanson, Jeremy M., Holcomb, Chris T., Humphreys, Dave A., Kim, Jayhyun, Kolemen, Egemen, Kong, Mengdi, Lanctot, Matthew J., Lehnen, Michael, Lerche, Ernesto, Logan, Nikolas, Maraschek, Marc, Okabayashi, Michio, Park, Jong-Kyu, Pau, Alessandro, Pautasso, Gabriella, Poli, Francesca M., Rea, Cristina, Sabbagh, Steve A., Sauter, Olivier, Schuster, Eugenio, Sheikh, Umar Ahmed, Sozzi, Carlo, Turco, Francesca, Turnbull, Alan D., Wang, Zhirui, Wehner, Will P., and Zeng, Long. Thu . "Progress in disruption prevention for ITER". United States. doi:10.1088/1741-4326/ab15de.
@article{osti_1508614,
title = {Progress in disruption prevention for ITER},
author = {Strait, E. J. and Barr, Jayson L. and Baruzzo, Matteo and Berkery, John and Buttery, Richard J. and de Vries, Peter C. and Eidietis, Nicholas W. and Granetz, Robert and Hanson, Jeremy M. and Holcomb, Chris T. and Humphreys, Dave A. and Kim, Jayhyun and Kolemen, Egemen and Kong, Mengdi and Lanctot, Matthew J. and Lehnen, Michael and Lerche, Ernesto and Logan, Nikolas and Maraschek, Marc and Okabayashi, Michio and Park, Jong-Kyu and Pau, Alessandro and Pautasso, Gabriella and Poli, Francesca M. and Rea, Cristina and Sabbagh, Steve A. and Sauter, Olivier and Schuster, Eugenio and Sheikh, Umar Ahmed and Sozzi, Carlo and Turco, Francesca and Turnbull, Alan D. and Wang, Zhirui and Wehner, Will P. and Zeng, Long},
abstractNote = {Key plasma physics and real-time control elements needed for robustly stable operation of high fusion power discharges in ITER have been displayed in recent research worldwide. Recent analysis has identified the current density profile as the main drive for disruptive instabilities in discharges simulating ITER's baseline scenario with high and low external torque. Ongoing development of model-based profile control and active control of magnetohydrodynamic instabilities is improving the stability of multiple scenarios. Significant advances have been made toward real-time physics-based prediction of instabilities, including path-oriented analysis, active sensing, and machine learning techniques for prediction that are beginning to go beyond simple disruption mitigation trigger applications. Active intervention adds to prevention of disruptions, including forced rotation of magnetic islands to prevent wall locking, and localized heating/current drive to shrink the islands. Stable discharge rampdowns have been achieved with the fastest ITER-like scaled current ramp rates, while maintaining an X-point configuration. These elements are being integrated into stable operating scenarios and new event-handling systems for off-normal events in order to develop the physics basis and techniques for robust control in ITER.},
doi = {10.1088/1741-4326/ab15de},
journal = {Nuclear Fusion},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {4}
}

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