2024-03-28T20:02:57Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02000220
2023-01-16T05:07:25Z
336:695:696
Effects of ion polarization and finite-β on heat transport in slab electron-temperature-gradient driven turbulencea
Maeyama, S.
Kusaka, S.
Watanabe, T.-H.
open access
Copyright 2021 Author(s). Published under an exclusive license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in (Physics of Plasmas 28, 052512 (2021)) and may be found at (https://doi.org/10.1063/5.0044435).
Effects of kinetic ions and electromagnetic fluctuations on slab electron-temperature-gradient (ETG) driven turbulence are investigated by means of gyrokinetic simulations covering scales from electron gyroradius to ion gyroradius and electron skin depth. Linear growth rates of electrostatic ETG modes are enhanced by the ion polarization at ion gyroradius scale. Nonlinear simulations show that this low-poloidalwavenumber instability induces ion-scale eddies which cause heat transport higher than that in the adiabatic ion model. In finite-b plasma, electromagnetic fluctuations stabilize the low-wavenumber modes, and suppress the turbulent heat transport. Additionally, electromagnetic effects also weaken zonal flow generation, which slightly enhances turbulent transport than that in the electrostatic adiabatic ion model.
AIP Publishing
2022-05-25
2021-05-25
eng
journal article
VoR
http://hdl.handle.net/2237/0002000220
https://nagoya.repo.nii.ac.jp/records/2000220
1070-664X
1089-7674
Physics of Plasmas
28
052512
https://nagoya.repo.nii.ac.jp/record/2000220/files/5_0044435.pdf
application/pdf
2.1 MB
2022-05-25