Core Transport Properties in JT-60U and JET Identity Plasmas

X. Litaudon, Y. Sakamoto, P.C. de Vries, Antti Salmi, Tuomas Tala, C. Angioni, S. Benkadda, M.N.A. Beurskens, C. Bourdelle, M. Brix, K. Crombé, T. Fujita, S. Futatani, X. Garbet, C. Giroud, N.C. Hawkes, N. Hayashi, G.T. Hoang, D. Hogeweij, G. MatsunagaT. Nakano, N. Oyama, V. Parail, K. Shinohara, T. Suzuki, M. Takechi, H. Takenaga, T. Takizuka, H. Urano, I. Voitsekhovich, M. Yoshida, JET-EFDA collaborators, JT-60 Team, ITPA Transport & Confinement Topical Group

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    The paper compares the transport properties of a set of dimensionless identity experiments performed between JET and JT-60U in the advanced tokamak regime with Internal Transport Barrier, ITB. These International Tokamak Physics Activity, ITPA, joint experiments were carried out with the same plasma shape, toroidal magnetic field ripple and dimensionless profiles. Similarities in the ITB triggering mechanisms and sustainment were observed when a good match was achieved of the most relevant normalized profiles except the toroidal Mach number. Similar thermal ion transport levels have been measured in either monotonic or non-monotonic q-profiles. On the contrary, differences between JET and JT-60U were observed on the electron thermal and particle confinement in reversed magnetic shear configurations. The large shear reversal in the center of JT-60U plasmas allowed the sustainment of stronger electron density ITBs compared to JET. As a consequence of peaked density profile, the core bootstrap current density is more than five times higher in JT60U compared to JET and reversed magnetic shear configurations are self-sustained in JT-60U scenarios.
    Original languageEnglish
    Title of host publicationProceedings of the 23rd IAEA Fusion Energy Conference
    PublisherInternational Atomic Energy Agency IAEA
    Publication statusPublished - 2010
    MoE publication typeNot Eligible
    Event23rd IAEA Fusion Energy Conference, FEC 2010 - Daejon, Korea, Republic of
    Duration: 10 Oct 201016 Oct 2010

    Conference

    Conference23rd IAEA Fusion Energy Conference, FEC 2010
    CountryKorea, Republic of
    CityDaejon
    Period10/10/1016/10/10

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