LAUSR

The interaction of Kinetic Alfven (KA) wave solitons is examined in a finite β (me/mi < β < 1) electron-ion plasma with kappa distributed electrons. Following the extended Poincare-Lighthill-Kuo method, coupled Korteweg–de Vries (KdV) equations are derived for the interaction of two moving opposite Kinetic Alfvenic solitons and the corresponding phase shifts are estimated. The procedure is then extended to the multiple soliton interaction of Kinetic Alfven waves. By using the Hirota bilinear method, the solution of two-sided double and two-sided triple KA KdV solitons and their corresponding phase shifts are obtained. The profiles of head-on collision in multiple soliton situations are shown; the present model supports only compressive sub-Alfvenic soliton structures. It is found that plasma β, obliqueness, and the superthermality index significantly alter the phase shifts (due to head-on and overtaking collisions). The magnitude of the phase shift due to overtaking collision is more compared to that with the head-on collision. The present study is relevant to space and laboratory plasma underpinning sub-Alfvenic soliton.