Regulation of electron temperature gradient turbulence by zonal flows driven by trapped electron modes

2014 ◽  
Vol 21 (5) ◽  
pp. 052306 ◽  
Author(s):  
Y. Asahi ◽  
A. Ishizawa ◽  
T.-H. Watanabe ◽  
H. Tsutsui ◽  
S. Tsuji-Iio
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Zonal Flows ◽  
Electron Temperature Gradient ◽  
Trapped Electron

scholarly journals Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence

2008 ◽  
Vol 74 (3) ◽  
pp. 381-389 ◽  
Author(s):  
Yu. A. ZALIZNYAK ◽  
A. I. YAKIMENKO ◽  
V. M. LASHKIN
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Large Scale ◽  
Modulational Instability ◽  
Zonal Flow ◽  
Finite Amplitude ◽  
Small Scale ◽  
Drift Waves ◽  
Zonal Flows ◽  
Electron Temperature Gradient

AbstractThe generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.

Ion scale nonlinear interaction triggered by disparate scale electron temperature gradient mode

2015 ◽  
Vol 22 (5) ◽  
pp. 052301
Author(s):  
Chanho Moon ◽  
Tatsuya Kobayashi ◽  
Kimitaka Itoh ◽  
Rikizo Hatakeyama ◽  
Toshiro Kaneko
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Nonlinear Interaction ◽  
Electron Temperature Gradient ◽  
Gradient Mode
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