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Comparison of steady-state and perturbative transport coefficients in TFTR

  • Author(s): Efthimion, PC
  • Barnes, CW
  • Bell, MG
  • Biglari, H
  • Bretz, N
  • Diamond, PH
  • Hammett, G
  • Heidbrink, W
  • Hulse, R
  • Johnson, D
  • Kusama, Y
  • Mansfield, D
  • Medley, SS
  • Nazikian, R
  • Park, H
  • Ramsey, A
  • Rewoldt, G
  • Scott, SD
  • Stratton, BC
  • Synakowski, E
  • Tang, WM
  • Taylor, G
  • Zarnstorff, MC
  • Zweben, SJ
  • et al.

Published Web Location

https://doi.org/10.1063/1.859598Creative Commons Attribution 4.0 International Public License
Abstract

Steady-state and perturbative transport analysis are complementary techniques for the study of transport in tokamaks. These techniques are applied to the investigation of auxiliary-heated L-mode and supershot plasmas in the tokamak fusion test reactor (TFTR) [R. J. Hawryluk et al., Plasma Physics and Controlled Nuclear Fusion Research, Proceedings of the 11th International Conference, Kyoto, 1986 (IAEA, Vienna, 1987), Vol. 1, p. 51.]. In the L mode, both steady-state and perturbative transport measurements reveal a strong temperature dependence that is consistent with electrostatic microinstability theory and the degradation of confinement with neutral beam power. Steady-state analysis of the ion heat and momentum balance in supershots indicates a reduction and a significant weakening of the power-law dependence on the transport in the center of the discharge. © 1991 American Institute of Physics.

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