The Study of Electron Acoustic Waves (EAWs) in Non-thermal Plasma

Using the kinetic theory approach, a theoretical investigation has been made to study the electron acoustic waves (EAWs) in non-thermal plasma. The dispersion relation omega(r) and Landau damping rate gamma for Langmuir waves (LWs) and electron acoustic waves (EAWs) are derived in a three component (ions, cold electrons and hot electrons) plasma, characterized by non-thermal Cairn's distribution function. Analytical expressions show that the real frequency omega(r) and Landau damping rate gamma are strongly influenced by non-thermal parameter a, hot to cold electron temperature ratio T-h/T-c and by the population ratio of hot to cold electron n(oh)/n(oc). Furthermore, in the absence of non-thermal particles the well-known Maxwellian results are retrieved. For illustration the present model has been applied to space and astrophysical plasma such as: geomagnetic tail, cusp of the magnetosphere and the dayside auroral acceleration region where the cold and hot electrons population exist.

Automated summary

Using the kinetic theory approach, this theoretical investigation studies the electron acoustic waves in non-thermal plasma. The dispersion relation and Landau damping rate for Langmuir waves and electron acoustic waves are derived and it is found that these parameters are strongly influenced by non-thermal parameter, temperature ratio, and population ratio.