Excitation of an Ion-Acoustic Soliton in quiescent argon plasma confined by multipole line cusp magnetic field

Multi Cusp plasma Device (MPD) with six electromagnets has the feature of producing different multi-pole cusp magnetic field configurations.  In this system with filament produced argon, the electrostatic fluctuations are found to be less than 1% (δn/n<1%), a characteristic of quiescent plasma. In this plasma condition, Ion acoustic waves were excited and their propagation was studied in detail by varying the plasma conditions along with the multi-pole cusp field values.  After this, large amplitude potential perturbations were given to the grid immersed in the plasma in the field free region.  These large potentials bring in nonlinear characteristics with coherence which helps in identifying solitary waves. These solitary waves are then characterized experimentally and compared with 1-D KdV Ion Acoustic soliton. The results of these studies will be discussed in detail along with possible explanation.