2011•Unpublished venueOpen access
Density Gradient Stabilization of Electron Temperature Gradient Driven Turbulence in a Spherical Tokamak
Yanzhi Ren, E. Mazzucato, W. Guttenfelder, R. E. Bell, C. W. Domier, B.P. LeBlanc, K. C. Lee, Neville C. Luhmann, D. R. Smith
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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.
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