Dynamic transport study of the plasmas with transport improvement in LHD and JT-60U

K. Ida; Y. Sakamoto; Inagaki Shigeru; H. Takenaga; A. Isayama; G. Matsunaga; R. Sakamoto; K. Tanaka; S. Ide; T. Fujita; H. Funaba; S. Kubo; M. Yoshinuma; T. Shimozuma; Y. Takeiri; K. Ikeda; C. Michael; T. Tokuzawa

doi:10.1088/0029-5515/49/1/015005

Dynamic transport study of the plasmas with transport improvement in LHD and JT-60U

K. Ida, Y. Sakamoto, Inagaki Shigeru, H. Takenaga, A. Isayama, G. Matsunaga, R. Sakamoto, K. Tanaka, S. Ide, T. Fujita, H. Funaba, S. Kubo, M. Yoshinuma, T. Shimozuma, Y. Takeiri, K. Ikeda, C. Michael, T. Tokuzawa

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Transport analysis during the transient phase of heating (a dynamic transport study) applied to the plasma with internal transport barriers (ITBs) in the Large Helical Device (LHD) heliotron and the JT-60U tokamak is described. In the dynamic transport study the time of transition from the L-mode plasma to the ITB plasma is clearly determined by the onset of flattening of the temperature profile in the core region and a spontaneous phase transition from a zero curvature ITB (hyperbolic tangent shaped ITB) or a positive curvature ITB (concaved shaped ITB) to a negative curvature ITB (convex shaped ITB) and its back-transition are observed. The flattening of the core region of the ITB transition and the back-transition between a zero curvature ITB and a convex ITB suggest the strong interaction of turbulent transport in space.

Original language	English
Article number	015005
Journal	Nuclear Fusion
Volume	49
Issue number	1
DOIs	https://doi.org/10.1088/0029-5515/49/1/015005
Publication status	Published - Jan 1 2009

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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Ida, K., Sakamoto, Y., Shigeru, I., Takenaga, H., Isayama, A., Matsunaga, G., Sakamoto, R., Tanaka, K., Ide, S., Fujita, T., Funaba, H., Kubo, S., Yoshinuma, M., Shimozuma, T., Takeiri, Y., Ikeda, K., Michael, C., & Tokuzawa, T. (2009). Dynamic transport study of the plasmas with transport improvement in LHD and JT-60U. Nuclear Fusion, 49(1), [015005]. https://doi.org/10.1088/0029-5515/49/1/015005

Ida, K, Sakamoto, Y, Shigeru, I, Takenaga, H, Isayama, A, Matsunaga, G, Sakamoto, R, Tanaka, K, Ide, S, Fujita, T, Funaba, H, Kubo, S, Yoshinuma, M, Shimozuma, T, Takeiri, Y, Ikeda, K, Michael, C & Tokuzawa, T 2009, 'Dynamic transport study of the plasmas with transport improvement in LHD and JT-60U', Nuclear Fusion, vol. 49, no. 1, 015005. https://doi.org/10.1088/0029-5515/49/1/015005

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abstract = "Transport analysis during the transient phase of heating (a dynamic transport study) applied to the plasma with internal transport barriers (ITBs) in the Large Helical Device (LHD) heliotron and the JT-60U tokamak is described. In the dynamic transport study the time of transition from the L-mode plasma to the ITB plasma is clearly determined by the onset of flattening of the temperature profile in the core region and a spontaneous phase transition from a zero curvature ITB (hyperbolic tangent shaped ITB) or a positive curvature ITB (concaved shaped ITB) to a negative curvature ITB (convex shaped ITB) and its back-transition are observed. The flattening of the core region of the ITB transition and the back-transition between a zero curvature ITB and a convex ITB suggest the strong interaction of turbulent transport in space.",

author = "K. Ida and Y. Sakamoto and Inagaki Shigeru and H. Takenaga and A. Isayama and G. Matsunaga and R. Sakamoto and K. Tanaka and S. Ide and T. Fujita and H. Funaba and S. Kubo and M. Yoshinuma and T. Shimozuma and Y. Takeiri and K. Ikeda and C. Michael and T. Tokuzawa",

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AU - Ida, K.

AU - Sakamoto, Y.

AU - Shigeru, Inagaki

AU - Takenaga, H.

AU - Isayama, A.

AU - Matsunaga, G.

AU - Sakamoto, R.

AU - Tanaka, K.

AU - Ide, S.

AU - Fujita, T.

AU - Funaba, H.

AU - Kubo, S.

AU - Yoshinuma, M.

AU - Shimozuma, T.

AU - Takeiri, Y.

AU - Ikeda, K.

AU - Michael, C.

AU - Tokuzawa, T.

PY - 2009/1/1

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N2 - Transport analysis during the transient phase of heating (a dynamic transport study) applied to the plasma with internal transport barriers (ITBs) in the Large Helical Device (LHD) heliotron and the JT-60U tokamak is described. In the dynamic transport study the time of transition from the L-mode plasma to the ITB plasma is clearly determined by the onset of flattening of the temperature profile in the core region and a spontaneous phase transition from a zero curvature ITB (hyperbolic tangent shaped ITB) or a positive curvature ITB (concaved shaped ITB) to a negative curvature ITB (convex shaped ITB) and its back-transition are observed. The flattening of the core region of the ITB transition and the back-transition between a zero curvature ITB and a convex ITB suggest the strong interaction of turbulent transport in space.

AB - Transport analysis during the transient phase of heating (a dynamic transport study) applied to the plasma with internal transport barriers (ITBs) in the Large Helical Device (LHD) heliotron and the JT-60U tokamak is described. In the dynamic transport study the time of transition from the L-mode plasma to the ITB plasma is clearly determined by the onset of flattening of the temperature profile in the core region and a spontaneous phase transition from a zero curvature ITB (hyperbolic tangent shaped ITB) or a positive curvature ITB (concaved shaped ITB) to a negative curvature ITB (convex shaped ITB) and its back-transition are observed. The flattening of the core region of the ITB transition and the back-transition between a zero curvature ITB and a convex ITB suggest the strong interaction of turbulent transport in space.

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Dynamic transport study of the plasmas with transport improvement in LHD and JT-60U

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