Influence of zonal flows on unstable drift modes in ETG turbulence
V. M. Lashkin, Yu. A. Zaliznyak, and A. I. Yakimenko
TL;DR
This paper investigates how zonal flows influence the stability of electron temperature gradient (ETG) driven modes, showing that shearing by zonal flows can suppress these instabilities in plasma turbulence.
Contribution
It introduces analysis of both random and deterministic zonal flow profiles and demonstrates their stabilizing effect on ETG drift modes.
Findings
Zonal flows can stabilize ETG drift modes.
Shearing by zonal flows reduces linear instability.
Both random and deterministic profiles are effective.
Abstract
The linear instability of the electron temperature gradient (ETG) driven modes in the presence of zonal flows is investigated. Random and deterministic - like profiles of the zonal flow are considered. It is shown that the presence of shearing by zonal flows can stabilize the linear instability of ETG drift modes.
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