Density Gradient Stabilization of Electron Temperature Gradient Driven Turbulence in a Spherical Tokamak

Ren, Y ; Mazzucato, E ; Guttenfelder, W ; Bell, R E ; Domier, C W ; LeBlanc, B P ; Lee, K C ; Luhmann Jr, N C ; Smith, D R

Princeton University. Plasma Physics Laboratory.

关键词: Stabilization;    70 Plasma Physics And Fusion Technology;    Thermal Diffusivity;    Electron Temperature;    Turbulence;   

DOI  :  10.2172/1010967
RP-ID  :  PPPL-4607
RP-ID  :  DE-ACO2-09CH11466
RP-ID  :  1010967

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.