title: Experimental evidence for a reduction in electron thermal diffusion due to trapped particles.
abstract: New high time resolution measurements of the electron thermal diffusion χ(e) throughout the sawtooth cycle of the Madison Symmetric Torus reversed-field pinch have been made by utilizing the enhanced capabilities of the upgraded multipoint, multipulse Thomson scattering system. These measurements are compared to the χ(e) due to magnetic diffusion predicted by using information from a new high spectral resolution zero-β nonlinear resistive magnetohydrodynamic simulation performed, for the first time, at the Lundquist number of high current Madison Symmetric Torus plasmas (S≈4×10(6)). Agreement between the measured and predicted values is found only if the reduction in thermal diffusion due to trapped particles is taken into account.
authors: Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA. jareusch@wisc.edu
authors: J A
authors: JA
authors: Reusch
authors: J K
authors: JK
authors: Anderson
authors: D J
authors: DJ
authors: Den Hartog
authors: F
authors: F
authors: Ebrahimi
authors: D D
authors: DD
authors: Schnack
authors: H D
authors: HD
authors: Stephens
authors: C B
authors: CB
authors: Forest