Abstract
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 language | English |
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Journal | Physical Review Letters |
Volume | 91 |
Issue number | 4 |
DOIs | |
State | Published - Jul 24 2003 |
Externally published | Yes |
Funding
The authors recognize the many contributions of the UW–Madison MST group, including collaborators from UCLA and RPI. This work was supported by the U.S. Department of Energy, in particular, the Magnetic Fusion Science program.
Funders | Funder number |
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U.S. Department of Energy |