Linear calculation of resistive instabilities in reversed field pinches

The time-dependent, linear, resistive magnetohydrodynamic, numerical models that have been developed at Livermore are briefly reviewed. The purpose of these codes is to compute growth rates and mode structure of tearing, rippling, and mixed modes in diffuse pinches. Cylindrical and Cartesian geometries are used in the applications. Results for the Reversed Field Pinch in cylindrical geometry are described, and the influence of other dissipative effects is considered. The double tearing mode is described as well as the effect of equilibrium flow on the tearing mode.