ION-TEMPERATURE AND ELECTRON-TEMPERATURE FLUCTUATIONS EXCITED BY RESISTIVE INSTABILITIES IN A SELF-CONSISTENTLY STATIONARY INHOMOGENEOUS-PLASMA

Ion- and electron-temperature fluctuations in: a resistive plasma are analyzed in the two-fluid slab approximation, allowing for the self-co nsistently stationary system parameters. In the weakly collisional reg ion, ion-temperature fluctuations which propagate in the direction of electron diamagnetic drifts can be excited, whereas electron-temperatu re fluctuations are considerably smaller in comparison with ion-temper ature fluctuations and are out of phase with them. The modes are more stable when the electron drift (which produces magnetic shear, satisfy ing Ampere's law) flows in the opposite direction to the mode propagat ions. The negative electron-temperature gradient is found to be stabil izing, while the ion-temperature gradient is irrelevant to this stabil ity. The density response exhibits Boltzmann-like behavior. In the str ongly collisional region, both ion- and electron-temperature fluctuati ons can be excited to the same order and propagate in the ion diamagne tic drift direction. The negative ion-temperature gradient is destabil izing, whereas the negative electron-temperature gradient is stabilizi ng. The density response exhibits non-Boltzmann-like behavior.