Charged particle acceleration in astrophysical plasmas.

Highly turbulent plasmas are extensively found in the space. Magnetohydrodynamics (MHD) is the main analytical tool for studying the magnetic properties of such ionised fluids and nonlinear phenomena, e.g., galaxies, star formation, interstellar winds and clouds etc. A large amplitude wave produces a strong turbulence. The turbulence is still to be well understood. This characteristic can be exploited for many applications. Charged particle acceleration is one of the important ones. There are many possible mechanisms of particle acceleration in astrophysical plasmas. The stochastic mechanisms and aggravated wave activity is one of them. The modified two stream instability (MTSI), being one of the examples of this mechanism, is driven by the ion motion in the crossed magnetic field leading to electron acceleration. The energy distribution of particles along with the mechanism of instability saturation is one of the main issues in the study.