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(CT/P-05) Increased Understanding of the Dynamics and Transport in ITB Plasmas from Multi-Machine Comparisons

P. Gohil¹⁾, J. Kinsey²⁾, V. Parail³⁾, X. Litaudon⁴⁾, T. Fukuda⁵⁾, T. Hoang⁴⁾, J. Connor⁶⁾, E. Doyle⁷⁾, Y. Esipchuk⁸⁾, T. Fujita⁵⁾, S. Lebedev⁹⁾, V. Mukhovatov¹⁰⁾, J. Rice¹¹⁾, E. Synakowski¹²⁾, K. Toi¹³⁾, B. Unterberg¹⁴⁾, V. Vershkov⁸⁾, M. Wakatani¹⁵⁾, J. Weiland¹⁶⁾, T. Aniel⁴⁾, Y. Baranov³⁾, E. Barbato¹⁷⁾, A. Bécoulet⁴⁾, C. Bourdelle⁴⁾, G. Bracco¹⁷⁾, R.V. Budny¹²⁾, P. Buratti¹⁷⁾, L. Ericsson⁴⁾, B. Esposito¹⁷⁾, C. Greenfield¹⁾, M. Greenwald¹¹⁾, T. Hahm¹²⁾, T. Hellsten³⁾, D. Hogeweij¹⁸⁾, S. Ide⁵⁾, F. Imbeaux⁴⁾, Y. Kamada⁵⁾, N. Kirneva⁸⁾, P. Maget⁴⁾, A. Peeters¹⁹⁾, K. Razumova⁸⁾, F. Ryter¹⁹⁾, Y. Sakamoto⁵⁾, H. Shirai⁵⁾, G. Sips¹⁹⁾, T. Suzuki⁵⁾, T. Takizuka⁵⁾, R. Wolf^19)
 
1) General Atomics, San Diego, CA, USA
²⁾ Lehigh University, Bethlehem, Pennsylvania, USA
³⁾ EFDA-JET CSU, Culham Science Centre, Abingdon, Oxon, UK
⁴⁾ Association Euratom-CEA, CEA de Cadarache, St Paul lez Durance, France
⁵⁾ JAERI, Naka Fusion Research Establishment, Naka, Japan
⁶⁾ EURATOM/UKAEA Association, Culham Science Centre, Abingdon, Oxon, UK
⁷⁾ University of California, Los Angeles, California, USA
⁸⁾ Kurchatov Institute of Atomic Energy, Moscow, Russia
⁹⁾ Ioffe Institute, St. Petersburg, Russia
¹⁰⁾ ITER JWS, Naka, Japan
¹¹⁾ Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
¹²⁾ Plasma Physics Laboratory, Princeton University, Princeton, New Jersey, USA
¹³⁾ National Institute of Fusion Science, Toki City, Japan
¹⁴⁾ Forschungszentrum Jülich, GmbH, EURATOM-Association, Jülich, Germany
¹⁵⁾ Kyoto University, Kyoto, Japan
¹⁶⁾ Chalmers University and EURATOM-VR Association, Gothenburg, Sweden
¹⁷⁾ Associazione EURATOM-ENEA sulla Fusione, Frascati, Italy
¹⁸⁾ FOM Insituut voor Plasmafisica, Rijnhuizen, Nieuwegein, the Netherlands
¹⁹⁾ Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, Germany

Abstract.  This paper presents details on: (a) examination and compilation of experimental results on transport from the many machines worldwide to better understand the physics of ITB formation and sustainment; (b) the development of an international database on ITB experimental results to determine the requirements for the formation and sustainment of ITBs, especially for reactor relevant conditions; (c) determining and performing comprehensive tests of theory-based models and simulations using the experimental ITB database. This paper will further present the status of research on critical issues in ITB physics including barrier formation and access conditions, particle and impurity transport, fueling, core-edge integration, profile control and stability as well as issues of accessibility in reactor scale devices such as barriers with T_e = T_i, barriers with low toroidal rotation and flat density profiles. Results will be presented from many devices providing a clearer understanding of transport and ITB physics in present plasmas and how this understanding can be applied to increase the performance of plasmas in future devices. An ITB database is being developed.

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