Details

Autor(en) / Beteiligte

• Watanabe, T.-H.
• Maeyama, S.
• Nakata, M.

Titel

Stabilization of trapped electron mode through effective diffusion in electron temperature gradient turbulence

Ist Teil von

• Nuclear fusion, 2023-05, Vol.63 (5), p.54001

Ort / Verlag

IOP Publishing

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Multi-scale gyrokinetic theory and simulations of a toroidal magnetized plasma have revealed the existence of cross-scale interactions of the trapped electron mode (TEM) and the electron temperature gradient (ETG) turbulence. Reduction of the TEM instability growth rate in the ETG turbulence is clearly identified, and is well represented in the form of effective diffusion. A theoretical model based on the stochastic forcing by the ETG turbulence well describes the turbulent diffusion coefficient observed in multi-scale turbulence simulations.