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Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution

(2017) NUCLEAR FUSION. 57(10).
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Abstract
Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat and particle loads on the wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research on ASDEX Upgrade (AUG), MAST and TCV. This multi-machine approach within EU-MST, covering a wide parameter range, is instrumental to progress in the field, as ITER and DEMO core/pedestal and SOL parameters are not achievable simultaneously in present day devices. A two prong approach is adopted. On the one hand, scenarios with tolerable transient heat and particle loads, including active edge localised mode (ELM) control are developed. On the other hand, divertor solutions including advanced magnetic configurations are studied. Considerable progress has been made on both approaches, in particular in the fields of: ELM control with resonant magnetic perturbations (RMP), small ELM regimes, detachment onset and control, as well as filamentary scrape-off-layer transport. For example full ELM suppression has now been achieved on AUG at low collisionality with n = 2 RMP maintaining good confinement H-H(98,H-y2) approximate to 0.95. Advances have been made with respect to detachment onset and control. Studies in advanced divertor configurations (Snowflake, Super-X and X-point target divertor) shed new light on SOL physics. Cross field filamentary transport has been characterised in a wide parameter regime on AUG, MAST and TCV progressing the theoretical and experimental understanding crucial for predicting first wall loads in ITER and DEMO. Conditions in the SOL also play a crucial role for ELM stability and access to small ELM regimes.
Keywords
SCRAPE-OFF LAYER, PARTICLE, DENSITY, edge localised modes, divertor, heat loads, ASDEX upgrade, MAST, TCV, alternative divertor concepts

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Chicago
Meyer, H., T. Eich, M. Beurskens, S. Coda, A. Hakola, P. Martin, J. Adamek, et al. 2017. “Overview of Progress in European Medium Sized Tokamaks Towards an Integrated Plasma-edge/wall Solution.” Nuclear Fusion 57 (10).
APA
Meyer, H., Eich, T., Beurskens, M., Coda, S., Hakola, A., Martin, P., Adamek, J., et al. (2017). Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution. NUCLEAR FUSION, 57(10).
Vancouver
1.
Meyer H, Eich T, Beurskens M, Coda S, Hakola A, Martin P, et al. Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution. NUCLEAR FUSION. Bristol: Iop Publishing Ltd; 2017;57(10).
MLA
Meyer, H. et al. “Overview of Progress in European Medium Sized Tokamaks Towards an Integrated Plasma-edge/wall Solution.” NUCLEAR FUSION 57.10 (2017): n. pag. Print.
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  abstract     = {Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat and particle loads on the wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research on ASDEX Upgrade (AUG), MAST and TCV. This multi-machine approach within EU-MST, covering a wide parameter range, is instrumental to progress in the field, as ITER and DEMO core/pedestal and SOL parameters are not achievable simultaneously in present day devices. A two prong approach is adopted. On the one hand, scenarios with tolerable transient heat and particle loads, including active edge localised mode (ELM) control are developed. On the other hand, divertor solutions including advanced magnetic configurations are studied. Considerable progress has been made on both approaches, in particular in the fields of: ELM control with resonant magnetic perturbations (RMP), small ELM regimes, detachment onset and control, as well as filamentary scrape-off-layer transport. For example full ELM suppression has now been achieved on AUG at low collisionality with n = 2 RMP maintaining good confinement H-H(98,H-y2) approximate to 0.95. Advances have been made with respect to detachment onset and control. Studies in advanced divertor configurations (Snowflake, Super-X and X-point target divertor) shed new light on SOL physics. Cross field filamentary transport has been characterised in a wide parameter regime on AUG, MAST and TCV progressing the theoretical and experimental understanding crucial for predicting first wall loads in ITER and DEMO. Conditions in the SOL also play a crucial role for ELM stability and access to small ELM regimes.},
  articleno    = {102014},
  author       = {Meyer, H. and Eich, T. and Beurskens, M. and Coda, S. and Hakola, A. and Martin, P. and Adamek, J. and Agostini, M. and Aguiam, D. and Ahn, J. and Aho-Mantila, L. and Akers, R. and Albanese, R. and Aledda, R. and Alessi, E. and Allan, S. and Alves, D. and Ambrosino, R. and Amicucci, L. and Anand, H. and Anastassiou, G. and Andrebe, Y. and Angioni, C. and Apruzzese, G. and Ariola, M. and Arnichand, H. and Arter, W. and Baciero, A. and Barnes, M. and Barrera, L. and Behn, R. and Bencze, A. and Bernardo, J. and Bernert, M. and Bettini, P. and Bilkova, P. and Bin, W. and Birkenmeier, G. and Bizarro, J. P. 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E. and Putterich, T. and Rack, M. and Ramogida, G. and Rapson, C. and Rasmussen, J. Juul and Rasmussen, J. and Ratta, G. A. and Ratynskaia, S. and Ravera, G. and Refy, D. and Reich, M. and Reimerdes, H. and Reimold, F. and Reinke, M. and Reiser, D. and Resnik, M. and Reux, C. and Ripamonti, D. and Rittich, D. and Riva, G. and Rodriguez-Ramos, M. and Rohde, V. and Rosato, J. and Ryter, F. and Saarelma, S. and Sabot, R. and Saint-Laurent, F. and Salewski, M. and Salmi, A. and Samaddar, D. and Sanchis-Sanchez, L. and Santos, J. and Sauter, O. and Scannell, R. and Scheffer, M. and Schneider, M. and Schneider, B. and Schneider, P. and Schneller, M. and Schrittwieser, R. and Schubert, M. and Schweinzer, J. and Seidl, J. and Sertoli, M. and Sesnic, S. and Shabbir, A. and Shalpegin, A. and Shanahan, B. and Sharapov, S. and Sheikh, U. and Sias, G. and Sieglin, B. and Silva, C. and Silva, A. and Fuglister, M. 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T. and Wagner, D. and Walkden, N. and Wang, N. and Wauters, T. and Weiland, M. and Weinzettl, V. and Westerhof, E. and Wiesenberger, M. and Willensdorfer, M. and Wischmeier, M. and Wodniak, I. and Wolfrum, E. and Yadykin, D. and Zagorski, R. and Zammuto, I. and Zanca, P. and Zaplotnik, R. and Zestanakis, P. and Zhang, W. and Zoletnik, S. and Zuin, M.},
  issn         = {0029-5515},
  journal      = {NUCLEAR FUSION},
  keywords     = {SCRAPE-OFF LAYER,PARTICLE,DENSITY,edge localised modes,divertor,heat loads,ASDEX upgrade,MAST,TCV,alternative divertor concepts},
  language     = {eng},
  number       = {10},
  pages        = {15},
  publisher    = {Iop Publishing Ltd},
  title        = {Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution},
  url          = {http://dx.doi.org/10.1088/1741-4326/aa6084},
  volume       = {57},
  year         = {2017},
}

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