From DNS data of a helical dynamo, the paper argues that β-type turbulent diffusion, not α, dominates large-scale magnetic field growth, with α mattering only in the saturated regime.
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Magnetic Field Amplification and Reconstruction in Rotating Astrophysical Plasmas: Verifying the Roles of $\alpha$ and $\beta$ in Dynamo Action
From DNS data of a helical dynamo, the paper argues that β-type turbulent diffusion, not α, dominates large-scale magnetic field growth, with α mattering only in the saturated regime.