Investigated in this thesis are the excitation and observation of Langmuir wave turbulence caused by the parametric decay instability (PDI) in high-frequency space plasma heating experiments conducted at the NSF/DoD High Frequency Active Auroral Research Program (HAARP) facility in Gakona, Alaska during the spring and summer of 2006. The PDI is the decay of an electromagnetic (EM) wave into an ...

Dust acoustic waves are very low frequency modes associated with the dynamics of charged dust in a plasma. These waves have phase speed much smaller than the ion thermal speed and frequencies typically below the dust plasma frequency which can be on the order of hertz to hundreds of hertz for typical lab dusty plasma parameters. When the phase speed of the wave is much larger than the thermal s...

A theoretical study is presented for the propagation of Dust Ion Acoustic Waves in an unmagnetized four-component plasma, consisting Maxwellian negative ions, cold mobile positive $\kappa$-distributed electrons and positively charged dust grains. Based on characteristics Sagdeev pseudopotential phase portraits, three types nonlinear waves are observed --- solitons, double layers supersolitons. ...

Kinetic dispersion of the ion acoustic waves has been explored for an unmagnetized five component plasma system comprising Venusian protons, oxygen ions, electrons, solar wind and kappa electrons. The protons electrons are assumed to be streaming along ambient magnetic field. parameters this study have obtained from Lundin et al. [Icarus 215(2), 751–758 (2011)] dawn dusk meridian Venus Express ...