Impact of local magnetic shear and Te/Ti ratio on confinement properties in toroidal confinement systems

T. Fukuda; N. Tamura; K. Ida; K. Tanaka; M. Yoshinuma; T. Kobuchi; K. Y. Watanabe; H. Funaba; H. Igami; K. Itoh; T. Ido; S. Inagaki; T. Oishi; T. Kato; S. Kado; S. Kubo; M. Goto; R. Sakamoto; S. Satake; A. Shimizu; T. Shimozuma; C. Suzuki; S. Sudo; Y. Takeiri; K. Toi; T. Tokuzawa; H. Nakano; K. Narihara; S. Nishimura; T. Notake; S. Muto; S. Morita; Y. Liu; H. Yamada; I. Yamada; M. Yokoyama; K. Kawahata; A. Komori

Impact of local magnetic shear and T_e/T_i ratio on confinement properties in toroidal confinement systems

T. Fukuda, N. Tamura, K. Ida, K. Tanaka, M. Yoshinuma, T. Kobuchi, K. Y. Watanabe, H. Funaba, H. Igami, K. Itoh, T. Ido, S. Inagaki, T. Oishi, T. Kato, S. Kado, S. Kubo, M. Goto, R. Sakamoto, S. Satake, A. ShimizuT. Shimozuma, C. Suzuki, S. Sudo, Y. Takeiri, K. Toi, T. Tokuzawa, H. Nakano, K. Narihara, S. Nishimura, T. Notake, S. Muto, S. Morita, Y. Liu, H. Yamada, I. Yamada, M. Yokoyama, K. Kawahata, A. Komori

Division of Nuclear Fusion Dynamics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

As a result of a series of deliberate experiments in a helical device and detailed comparative analysis against the tokamak database, aimed at resolving the role of local magnetic shear and T_e/T_i ratio on confinement, it was found that (1) the pronounced effect of magnetic shear, which has hitherto been considered to be ubiquitous and strongly impacts the core transport in the tokamak experiments, is not quite obvious in a helical device without a transport barrier, and (2) the influence of T _e/T_i ratio strongly prevails commonly in both the toroidal confinement systems in the improved confinement mode. It is thereby suggested that not only the magnetic shear but also the T_e/T_i ratio may carry significance only in plasmas with an already-established improved mode of confinement.

Original language	English
Title of host publication	36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
Pages	999-1002
Number of pages	4
Publication status	Published - Dec 1 2009
Event	36th European Physical Society Conference on Plasma Physics 2009, EPS 2009 - Sofia, Bulgaria Duration: Jun 29 2009 → Jul 3 2009

Publication series

Name	36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
Volume	33 E2

Other

Other	36th European Physical Society Conference on Plasma Physics 2009, EPS 2009
Country/Territory	Bulgaria
City	Sofia
Period	6/29/09 → 7/3/09

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Cite this

Fukuda, T., Tamura, N., Ida, K., Tanaka, K., Yoshinuma, M., Kobuchi, T., Watanabe, K. Y., Funaba, H., Igami, H., Itoh, K., Ido, T., Inagaki, S., Oishi, T., Kato, T., Kado, S., Kubo, S., Goto, M., Sakamoto, R., Satake, S., ... Komori, A. (2009). Impact of local magnetic shear and T_e/T_i ratio on confinement properties in toroidal confinement systems. In 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts (pp. 999-1002). (36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts; Vol. 33 E2).

Impact of local magnetic shear and T_e/T_i ratio on confinement properties in toroidal confinement systems. / Fukuda, T.; Tamura, N.; Ida, K. et al.

36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts. 2009. p. 999-1002 (36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts; Vol. 33 E2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Fukuda, T, Tamura, N, Ida, K, Tanaka, K, Yoshinuma, M, Kobuchi, T, Watanabe, KY, Funaba, H, Igami, H, Itoh, K, Ido, T, Inagaki, S, Oishi, T, Kato, T, Kado, S, Kubo, S, Goto, M, Sakamoto, R, Satake, S, Shimizu, A, Shimozuma, T, Suzuki, C, Sudo, S, Takeiri, Y, Toi, K, Tokuzawa, T, Nakano, H, Narihara, K, Nishimura, S, Notake, T, Muto, S, Morita, S, Liu, Y, Yamada, H, Yamada, I, Yokoyama, M, Kawahata, K & Komori, A 2009, Impact of local magnetic shear and T_e/T_i ratio on confinement properties in toroidal confinement systems. in 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts. 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts, vol. 33 E2, pp. 999-1002, 36th European Physical Society Conference on Plasma Physics 2009, EPS 2009, Sofia, Bulgaria, 6/29/09.

Fukuda T, Tamura N, Ida K, Tanaka K, Yoshinuma M, Kobuchi T et al. Impact of local magnetic shear and T_e/T_i ratio on confinement properties in toroidal confinement systems. In 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts. 2009. p. 999-1002. (36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts).

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title = "Impact of local magnetic shear and Te/Ti ratio on confinement properties in toroidal confinement systems",

abstract = "As a result of a series of deliberate experiments in a helical device and detailed comparative analysis against the tokamak database, aimed at resolving the role of local magnetic shear and Te/Ti ratio on confinement, it was found that (1) the pronounced effect of magnetic shear, which has hitherto been considered to be ubiquitous and strongly impacts the core transport in the tokamak experiments, is not quite obvious in a helical device without a transport barrier, and (2) the influence of T e/Ti ratio strongly prevails commonly in both the toroidal confinement systems in the improved confinement mode. It is thereby suggested that not only the magnetic shear but also the Te/Ti ratio may carry significance only in plasmas with an already-established improved mode of confinement.",

author = "T. Fukuda and N. Tamura and K. Ida and K. Tanaka and M. Yoshinuma and T. Kobuchi and Watanabe, {K. Y.} and H. Funaba and H. Igami and K. Itoh and T. Ido and S. Inagaki and T. Oishi and T. Kato and S. Kado and S. Kubo and M. Goto and R. Sakamoto and S. Satake and A. Shimizu and T. Shimozuma and C. Suzuki and S. Sudo and Y. Takeiri and K. Toi and T. Tokuzawa and H. Nakano and K. Narihara and S. Nishimura and T. Notake and S. Muto and S. Morita and Y. Liu and H. Yamada and I. Yamada and M. Yokoyama and K. Kawahata and A. Komori",

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T1 - Impact of local magnetic shear and Te/Ti ratio on confinement properties in toroidal confinement systems

AU - Fukuda, T.

AU - Tamura, N.

AU - Ida, K.

AU - Tanaka, K.

AU - Yoshinuma, M.

AU - Kobuchi, T.

AU - Watanabe, K. Y.

AU - Funaba, H.

AU - Igami, H.

AU - Itoh, K.

AU - Ido, T.

AU - Inagaki, S.

AU - Oishi, T.

AU - Kato, T.

AU - Kado, S.

AU - Kubo, S.

AU - Goto, M.

AU - Sakamoto, R.

AU - Satake, S.

AU - Shimizu, A.

AU - Shimozuma, T.

AU - Suzuki, C.

AU - Sudo, S.

AU - Takeiri, Y.

AU - Toi, K.

AU - Tokuzawa, T.

AU - Nakano, H.

AU - Narihara, K.

AU - Nishimura, S.

AU - Notake, T.

AU - Muto, S.

AU - Morita, S.

AU - Liu, Y.

AU - Yamada, H.

AU - Yamada, I.

AU - Yokoyama, M.

AU - Kawahata, K.

AU - Komori, A.

PY - 2009/12/1

Y1 - 2009/12/1

N2 - As a result of a series of deliberate experiments in a helical device and detailed comparative analysis against the tokamak database, aimed at resolving the role of local magnetic shear and Te/Ti ratio on confinement, it was found that (1) the pronounced effect of magnetic shear, which has hitherto been considered to be ubiquitous and strongly impacts the core transport in the tokamak experiments, is not quite obvious in a helical device without a transport barrier, and (2) the influence of T e/Ti ratio strongly prevails commonly in both the toroidal confinement systems in the improved confinement mode. It is thereby suggested that not only the magnetic shear but also the Te/Ti ratio may carry significance only in plasmas with an already-established improved mode of confinement.

AB - As a result of a series of deliberate experiments in a helical device and detailed comparative analysis against the tokamak database, aimed at resolving the role of local magnetic shear and Te/Ti ratio on confinement, it was found that (1) the pronounced effect of magnetic shear, which has hitherto been considered to be ubiquitous and strongly impacts the core transport in the tokamak experiments, is not quite obvious in a helical device without a transport barrier, and (2) the influence of T e/Ti ratio strongly prevails commonly in both the toroidal confinement systems in the improved confinement mode. It is thereby suggested that not only the magnetic shear but also the Te/Ti ratio may carry significance only in plasmas with an already-established improved mode of confinement.

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