Simulation and quasilinear theory of aperiodic ordinary mode instability

摘要: The purely growing ordinary (O) mode instability driven by excessive parallel temperature anisotropy for high-beta plasmas was first discovered in the 1970s. This receives renewed attention because it may be applicable to solar wind plasma. electrons feature anisotropies whose upper values are apparently limited plasma instabilities. O-mode important this regard. Previous studies of O have been based on linear theory, but actual saturated state. present paper investigates nonlinear saturation behavior means one-dimensional particle-in-cell simulation and quasilinear theory. It is shown that method accurately reproduces results.