Shear Stabilization of Collisional Drift Instability

抄録

Using the normal mode expansion method, the collisional drift waves of the slab plasma in a sheared magnetic field are investigated. In the strong shear parameter regime, 1\lesssimκL_s<<m_i⁄m_e (κ: density gradient, L_s: shear length and m_i⁄m_e: ion to electron mass ratio), the growth rate is found to be proportional to \sqrtν⁄ω_*. The diffusion coefficient is also estimated and a density limitation of high density tokamak is shown.