Physics

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Two-stream instability in e-p-i plasma with thermal effects
(UMT, Lahore, 2022) Ali Hamza Aslam
We have investigated the problem of two-stream instability in electron-positron-ion plasmas. It is well known that to destabilize a plasma system, free source of energy is always required. In two-stream instability case, free source of energy is the energetic beam of electrons, which destabilize electron-ion or electron-positron-ion plasma systems. In the beginning, we discuss the growth rate of two streaming instability in an electron-ion plasma in which electrons were considered to be dynamic and beam of electrons was injected with some fixed streaming velocity, whereas the ions were assumed to immobile to just provide the charge neutrality. The maximum growth has been estimated. Then this work was extended for electron-positron0ion plasma case, in which both the electrons and positrons were assume to dynamic and possessing streaming velocity. New dispersion relation was derived and analyzed numerically. Finally, we have extended this work further by taking into account the thermal effects. New dispersion was derived and the normalized dispersion relation was also analyzed numerically.