Turbulent Particle Transport in Magnetized Plasmas (original) (raw)

Abstract

Particle transport in magnetized plasmas is investigated with a fluid model of drift wave turbulence. An analytical calculation shows that magnetic field curvature and thermodiffusion drive an anomalous pinch. The curvature driven pinch velocity is consistent with the prediction of turbulence equipartition theory. The thermodiffusion flux is found to be directed inward for a small ratio of electron to ion pressure gradient, and reverses its sign when increasing this ratio. Numerical simulations confirm that a turbulent particle pinch exists. It is mainly driven by curvature for equal ion and electron heat sources. The sign and relative weights of the curvature and thermodiffusion pinches are consistent with the analytical calculation.

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References (17)

  1. A.A. Ware Phys. Rev. Lett. 25, 916 (1970).
  2. J. Stober, C. Fuchs, O. Gruber, et al., Nuclear Fusion 41, 1535 (2001).
  3. M.Valovic, J. Rapp, J.G. Cordey, et al., Plasma Physics and Controlled Fusion 44, 1911 (2000).
  4. H. Weisen, E. Minardi Europhys. Lett. 56, 542 (2001).
  5. G.T. Hoang et al., submitted to Phys. Rev. Lett.
  6. M. Z. Tokar, J. Ongena, B. Unterberg, and R. R. Weynants , Phys. Rev. Lett. 84, 895 (2000).
  7. L. Garzotti et al, submitted to Nucl. Fusion.
  8. B. Coppi and C. Spight, Phys. Rev. Lett. 41, 551 (1978).
  9. F. Jenko, Phys. Plasmas 7, 514 (2000).
  10. V.V. Yancov, JETP Lett. 60, 171 (1994).
  11. M.B. Isichenko, A.V. Gruzinov, P.H. Diamond, Phys. Rev. Lett. 74, 4436 (1996).
  12. D.R. Baker and M.N. Rosenbluth, Phys. Plasmas 5, 2936 (1998).
  13. V. Naulin, J. Nycander, and J. Juul Rasmussen, Phys. Rev. Lett. 81, 4148 (1998).
  14. H. Nordman, J. Weiland, A. Jarmen, Nucl. Fusion 30, 983 (1990)
  15. C. Angioni et al., submitted to Phys. Rev. Lett.
  16. X. Garbet, R.E. Waltz, Phys. Plasmas 3, 1898 (1996).
  17. X. Garbet, C. Bourdelle, G.T. Hoang, et al., Phys. Plasmas 8, 2793 (2001).