title: Electron heat transport measured in a stochastic magnetic field.
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.
authors.affiliation: Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. tbiewer@pppl.gov
authors.forename: T M
authors.initials: TM
authors.lastname: Biewer
authors.forename: C B
authors.initials: CB
authors.lastname: Forest
authors.forename: J K
authors.initials: JK
authors.lastname: Anderson
authors.forename: G
authors.initials: G
authors.lastname: Fiksel
authors.forename: B
authors.initials: B
authors.lastname: Hudson
authors.forename: S C
authors.initials: SC
authors.lastname: Prager
authors.forename: J S
authors.initials: JS
authors.lastname: Sarff
authors.forename: J C
authors.initials: JC
authors.lastname: Wright
authors.forename: D L
authors.initials: DL
authors.lastname: Brower
authors.forename: W X
authors.initials: WX
authors.lastname: Ding
authors.forename: S D
authors.initials: SD
authors.lastname: Terry