Anisotropic pressure and finite hot-electron Larmor radius effects on hot-electron ring stability

The effect of the anisotropic pressure of a hot-electron plasma on ballooning-interchange and compressional-Alfvén modes is investigated. General eigenmode equations for these modes are derived in the eikonal and high phase velocity limits with finite gyroradius effects retained. A local dispersion relation is obtained in the flute limit for an isotropic Maxwellian background plasma with a bi-Maxwellian hot-electron population. Stability is investigated both analytically and numerically for this high phase velocity and/or high precessional frequency model.