Plasma and Fusion Research

Volume 3, S1016 (2008)

Regular Articles


Two-Dimensional Model Including the Mechanism of a Poloidal Shock Structure and Geodesic Acoustic Mode in Toroidal Plasmas
Naohiro KASUYA and Kimitaka ITOH
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 9 November 2007 / Accepted 7 February 2008 / Published 25 June 2008)

Abstract

In H-mode plasmas, two-dimensional steep structures of the electrostatic potential and density are formed when a large poloidal flow exists, whose formation mechanism has been studied to obtain a quantitative understanding of the particle transport in H-mode transport barriers. The previous two-dimensional model is extended to investigate parallel flow dynamics when potential and density distributions do not satisfy the Boltzmann relation. The extended model includes the generation mechanism of a poloidal shock structure and geodesic acoustic mode, whose competitive formation can be studied.


Keywords

poloidal shock structure, geodesic acoustic mode, H mode, poloidal asymmetry, toroidicity

DOI: 10.1585/pfr.3.S1016


References

  • [1] F. Wagner et al., Phys. Rev. Lett. 49, 1408 (1982).
  • [2] K. Itoh, S.-I. Itoh and A. Fukuyama, Transport and Structural Formation in Plasmas (IOPP, Bristol, 1999).
  • [3] T. Taniuti, H. Moriguchi, Y. Ishii, K. Watanabe and M. Wakatani, J. Phys. Soc. Jpn. 61, 568 (1992).
  • [4] K.C. Shaing, R.D. Hazeltine and H. Sanuki, Phys. Fluids B 4, 404 (1992).
  • [5] N. Kasuya and K. Itoh, Phys. Rev. Lett. 94, 195002 (2005).
  • [6] A. Mohri and M. Fujiwara, Nucl. Fusion 14, 67 (1974).
  • [7] R.J. Taylor, P. Pribyl, G.R. Tynan and B.C. Wells, in Proc. of 15th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Seville, 1994 (IAEA, Vienna, 1995) Vol. 2, p. 127.
  • [8] R. Betti and J.P. Freidberg, Phys. Plasmas 7, 2439 (2000).
  • [9] N. Kasuya and K. Itoh, Nucl. Fusion 48, 035003 (2008).
  • [10] N. Winsor, J.L. Johnson and J.M. Dawson, Phys. Fluids 11, 2448 (1968).
  • [11] For a review, e.g., P.H. Diamond, S.-I. Itoh, K. Itoh and T.S. Hahm, Plasma Phys. Control. Fusion 47, R35 (2005).
  • [12] For a review, e.g., A. Fujisawa et al., Nucl. Fusion 47, S718 (2007).
  • [13] A.B. Hassam and J.F. Drake, Phys. Fluids B 5, 4022 (1993).
  • [14] K.C. Shaing, E.C. Crume and W.A. Houlberg, Phys. Fluids B 2, 1492 (1990).
  • [15] N. Kasuya and K. Itoh, J. Plasma Fusion Res. 81, 553 (2005).
  • [16] N. Kasuya and K. Itoh, Phys. Plasmas 12, 090905 (2005).
  • [17] N. Kasuya, K. Itoh and Y. Takase, Nucl. Fusion 43, 244 (2003).

This paper may be cited as follows:

Naohiro KASUYA and Kimitaka ITOH, Plasma Fusion Res. 3, S1016 (2008).