Space is filled with plasma. In our solar system, or heliosphere, the main source of plasma is the sun. Magnetospheres of planets are connected with the sun via the plasma filling the interplanetary space. Their behaviour is influenced in many ways by solar activity. The heliosphere itself is exposed to interstellar space which is also flled with interstellar plasma...

Various high energy phenomena in space are controlled by the behaviour of surrounding plasma. I study some of those phenomena and the associated particle acceleration, nonlinear waves, ..., by means of theory and numerical simulation.