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Advanced Tokamak Regime

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Frontiers in Fusion Research II

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Abstract

For the efficient steady state operation, an operation at a high bootstrap current fraction is essential. The bootstrap current is hollow in the radial direction, which tends to be unstable to the MHD modes. But there is certain operating regime, which is stable to MHD modes and has excellent energy and particle confinement property. This regime is called advanced tokamak regime . After some introduction of advanced tokamak research in Sect. 3.1, operation regimes in (q, l i ) and (n e , I p ∕π a 2) are shown in Sect. 3.2. Characteristics and ideal MHD stability of the weak shear operation scenario are introduced in Sect. 3.3. Characteristics and ideal MHD stability of the negative shear and current hole operations are introduced in Sects. 3.4 and 3.5, respectively. We also briefly describe the status and issues of the long pulse operation as an important research direction in Sect. 3.6. New advanced tokamak devices are introduced in Sect. 3.7 and representative data of tokamak and helical device LHD are shown in Sect. 3.8. Activity of IAE Large Tokamak agreement is introduced in a Salon.

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Authors and Affiliations

  1. Japan Atomic Energy Agency, Naka, Ibaraki, Japan

    Mitsuru Kikuchi

  2. AZM Techno Science Soft, Setagaya, Tokyo, Japan

    Masafumi Azumi

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  1. Mitsuru Kikuchi
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3.8 Appendix: Tokamak/Helical Representative Data

3.8 Appendix: Tokamak/Helical Representative Data

Representative data from JT-60U, JET, Tore Supra, LHD are shown. Data provided by JT-60U (Drs Y. Kamada, S. Ide), JET (Dr. G. Sips), Tore Supra (Drs X. Litaudon, G.T. Hoang), and LHD (Prof. T. Mutoh; *; [566], private communication) (Table 3.1).

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Kikuchi, M., Azumi, M. (2015). Advanced Tokamak Regime. In: Frontiers in Fusion Research II. Springer, Cham. https://doi.org/10.1007/978-3-319-18905-5_3

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