Electron Heat Transport Measured in a Stochastic Magnetic Field

T. M. Biewer, C. B. Forest, J. K. Anderson, G. Fiksel, B. Hudson, S. C. Prager, J. S. Sarff, J. C. Wright, D. L. Brower, W. X. Ding, S. D. Terry

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New profile measurements have allowed the electron thermal diffusivity profile to be estimated from power balance in the Madison Symmetric Torus where magnetic islands overlap and field lines are stochastic. The measurements show that (1) the electron energy transport is conductive not convective, (2) the measured thermal diffusivities are in good agreement with numerical simulations of stochastic transport, and (3) transport is greatly reduced near the reversal surface where magnetic diffusion is small.

Original languageEnglish (US)
JournalPhysical review letters
Issue number4
StatePublished - Jul 24 2003

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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