Quasilinear approach to bump-on-tail instability using non-Maxwellian distributions

Abstract Spacecraft observations provide evidence about the existence of various waves and kinetic instabilities in solar wind plasmas. These play an important role dynamics wind. In present work, bump-on-tail (BOT) instability is revisited by employing κ then modified (r, κ) distributions using a quasilinear approach. The evolution studied analytically numerically data. growth rate BOT for varying ratios temperature number density also observed. It observed that maximum increases with increasing decreases electron bump. effect spectral indices kappa distribution r functions ultimately contributes towards shoulder tail results appear to have been modified. Stimulation wave energy shows rapid variation as compared simple linear model.