Journal
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
Volume 48, Issue 1, Pages 835-843Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13369-022-07043-6
Keywords
Electron acoustic waves; Cairn's distribution; Plasma dispersion function; Phase velocity; Landau damping
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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.
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.
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