Finite-6 (plasma pressure/magnetic pressure) and resonant electron effects on the dissipative trapped-electron instabilities are analysed. These modifications are shown to have a strong stabilizing influence on the finite-ion-gyroradiusand electron-temperature-gradient-driven modes, respectively. For relevant tokamak parameters, complete stabilization may be possible. Stability criteria for radially local and non-local cases are presented.

Finite 6 (plasma pressure/magnetic pressure) and resonant electron effects on the dissipative trapped-electron instabilities are analyzed. These modifications are shown to have a strong stahilizinq influence on the finite ion gyroradius and electron temperature gradient driven modes, respectively. For. relevant tokamak parameters complete stabilization may be possible. Stability criteria for radially local and nonlocal cases are presented.