Density Gradient Stabilization of Electron Temperature Gradient Driven Turbulence in a Spherical Tokamak
Authors: Y. Ren, S.M. Kaye, E. Mazzucato, W. Guttenfelder, R.E. Bell, C.W. Domier, B.P. LeBlanc, K.C. Lee, N.C. Luhmann, Jr., D.R. Smith, and H. Yuh
Abstract:
In this letter we report the first clear experimental observation of density gradient stabilization
of electron temperature gradient driven turbulence in a fusion plasma. It is observed that longer
wavelength modes, k⊥ρs ≤10, are most stabilized by density gradient, and the stabilization is
accompanied by about a factor of two decrease in the plasma effective thermal diffusivity.
__________________________________________________
Submitted to: Physical Review Letters (December 2010)
__________________________________________________
Download PPPL-4607 (pdf 1.7 MB 10 pp)
__________________________________________________