Broken Ambipolarity of Diffusion in Drift Wave Turbulence

抄録

Momentum balance equations for electrons and ions are derived correct to the second order with respect to high frequency electric fields within the frame-work of the quasilinear theory. In particular, the stress tensor modification due to drift waves is evaluated from the second-moment equation. The ion drift caused by the gradient of the stress tensor breaks the ambipolarity of the diffusion. Strong electric fields across the ambient magnetic field are induced by the broken ambipolarity.