Plasma and Fusion Research

Volume 4, 036 (2009)

Regular Articles


Effects of the Stochasticity on Transport Properties in High-β LHD
Yasuhiro SUZUKI, Kiyomasa WATANABE, Hisamichi FUNABA, Satrou SAKAKIBARA, Noriyoshi NAKAJIMA, Nobuyoyshi OHYABU and LHD experiment group
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 22 December 2008 / Accepted 27 May 2009 / Published 13 July 2009)

Abstract

Effects of the stochasticity of magnetic field lines on transport properties are investigated. In a high-β LHD plasma, the structure of field lines in the peripheral region becomes stochastic by finite-β effects but the finite pressure gradient exists in that region. The radial diffusion coefficient and the Kolmogorov length of stochastic field lines are estimated. In the stochastic region, the radial diffusion of stochastic field lines becomes large and the Kolmogorov length becomes short due to increasing β. In that region, the radial heat transport becomes large due to the stochasticity of field lines.


Keywords

LHD, high-β, HINT2, stochasticity, radial heat diffusivity

DOI: 10.1585/pfr.4.036


References

  • [1] A.B. Rechester and M.N. Rosenbluth, Phys. Rev. Lett. 40, 38 (1978).
  • [2] T.H. Stix, Nucl. Fusion 18, 353 (1978).
  • [3] B.B. Kadomtsev and O.P. Pogutse, in Proc. 7th Int. Conf. Fusion energy, Innsbruck 1978 (International Atomic Energy Agency, Vienna, 1979), Vol. 1, p.649.
  • [4] J.A. Krommes et al., J. Plasma Phys. 30, 11 (1983).
  • [5] T. Hayashi et al., Phys. Fluids B 2, 329 (1990).
  • [6] Y. Suzuki et al., Nucl. Fusion 46, L19 (2006).
  • [7] K.Y. Watanabe et al., Plasma Phys. Control. Fusion 49, 605 (2007).
  • [8] T. Morisaki et al., J. Nucl. Matter. 313-316, 548 (2003).
  • [9] Y. Feng et al., Nucl. Fusion 48, 024012 (2008).
  • [10] Q. Yu, Phys. Plasmas 13, 062310 (2006).
  • [11] M. Hölzl et al., Phys. Plasmas 14, 052501 (2007).
  • [12] M. Kobayashi et al., Nucl. Fusion 44, S64 (2004).
  • [13] Ph. Ghendrih et al., Nucl. Fusion 42, 1221 (2002).
  • [14] E. Strumberger, Contrib. Plasma Phys. 38, 106 (1998).
  • [15] V.D. Shafranov et al., Sov. J. Plasma Phys. 2, 99 (1976).
  • [16] H. Funaba et al., Plasma Fusion Res. 3, 022 (2008).
  • [17] M. Kobayashi et al., Plasma Fusion Res. 3, S1005 (2008).
  • [18] K. Narihara et al., Phys. Rev. Lett. 87, 135002 (2001).
  • [19] N. Ohyabu et al., Phys. Rev. Lett. 88, 055005 (2002).
  • [20] Y. Narushima et al., Nucl. Fusion 48, 075010 (2008).
  • [21] T. Hayashi et al., Phys. Plasmas 1, 3262 (1994).
  • [22] C.C. Hegna and J.D. Callen, Phys. Plasmas 1, 3135 (1994).

This paper may be cited as follows:

Yasuhiro SUZUKI, Kiyomasa WATANABE, Hisamichi FUNABA, Satrou SAKAKIBARA, Noriyoshi NAKAJIMA, Nobuyoyshi OHYABU and LHD experiment group, Plasma Fusion Res. 4, 036 (2009).