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. 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

Research output: Chapter in Book/Report/Conference proceedingConference 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 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.

Original languageEnglish
Title of host publication36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
Pages999-1002
Number of pages4
Publication statusPublished - Dec 1 2009
Externally publishedYes
Event36th European Physical Society Conference on Plasma Physics 2009, EPS 2009 - Sofia, Bulgaria
Duration: Jun 29 2009Jul 3 2009

Publication series

Name36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
Volume33 E2

Other

Other36th European Physical Society Conference on Plasma Physics 2009, EPS 2009
CountryBulgaria
CitySofia
Period6/29/097/3/09

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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