A Hybrid Dissipative Trapped Electron ITG Mode

A simple model for the η_i-mode taking account of the dissipative trapped electron effect, which is described by means of the well-known formula of the nonadiabatic electron response, in a sheared slab geometry is presented. It predicts the existence of a hybrid dissipative trapped electron ion temperature gradient (ITG) mode. This conclusion is in agreement with the observation in the latest simulated tokamak experiment on the Columbia Linear Machine.