Gyrokinetic Stability of Electron-Positron-Ion Plasmas

摘要

The gyrokinetic stability of electron-positron plasmas contaminated by ion(proton) admixture is studied in slab geometry. The appropriate dispersionrelation is derived and solved. The ion-temperature-gradient driveninstability, the electron-temperature-gradient driven instability, theuniversal mode, and the shear Alfven wave are considered. The contaminatedplasma remains stable if the contamination degree is below some threshold, andit is found that the shear Alfven wave can be present in a contaminated plasmain cases where it is absent without ion contamination.