Toroidal kinetic ηi-mode study in high-temperature plasmas

Publisher Website
Google Scholar
Abstract
A new kinetic integral equation for the study of the ion‐temperature‐gradient‐driven mode in toroidal geometry is developed that includes the ion toroidal (curvature and magnetic gradient) drift motion ωD, the mode coupling from finite k∥ due to the toroidal feature of the sheared magnetic configuration. The integral equation allows the stability study for arbitrary k∥vi/(ω − ωD) and k⊥ ρi. A systematic parameter study is carried out for the low β circular flux surface equilibrium. Possible correlations between the unstable mode characteristics and some experimental results such as the fluctuation spectrum and the anomalous ion thermal transport measurements are discussed.