Basic features of the multiscale interaction between tearing modes and slab ion-temperature-gradient modes*

Project supported by the National Key R&D Program of China (Grant Nos. 2017YFE0301100 and 2017YFE0300500), the National Natural Science Foundation of China (Grant Nos. 11675038, 11775069, and 11305027), and the Fundamental Research Funds for the Central Universities of China (Grant No. DUT17RC(4)54).
Wei L1, †, Wang Z X1, ‡, Li J Q2, Hu Z Q1, Kishimoto Y3
       

Time evolution of (a) the kinetic Ekykin and (b) magnetic Ekymag energies for the zonal component with kyρi = 0.0, long wavelength tearing mode with dominating wavenumber kyρi = 0.05, and short wavelength ITG modes with dominating wavenumber kyρi = 0.5. Instantaneous ky spectra for (c) the kinetic and (d) magnetic energies in the log scale. Here, Ekykin=12〈 | ∇ϕ∼ky |2 〉=12∫−LxLx∇ϕ∼ky⋅∇ϕ∼ky∗dx and Ekymag=12〈 | ∇ψ∼ky |2 〉=12∫−LxLx∇ψ∼ky⋅∇ψ∼ky∗dx are, respectively, the average kinetic and magnetic energies of the fluctuations for different ky.