Single and multiple reflection of ion-acoustic waves and solitons from a bipolar wall

Abstract

Reflection of ion-acoustic waves and solitary signals at a wall consisting of a grid and a plate is demonstrated in a DP-machine plasma. A velocity comparison is made between the signals supporting the identification of the nonlinear solitary pulses as solitons. The reflection coefficient for both kinds of signals is found to lie near 100~o.

Energy and momentum conservation upon reflection of a solitary pulse in a bounded magnetized plasma

“…It has for instance been shown in an unmagnetized plasma that the sheath formed in front of a biased electrode can lead to a strong reflection of an incident IA soliton [13][14][15]. Building on this finding, it was then demonstrated that an IA soliton can be forced to bounce back and forth by applying suitable boundary conditions in a laboratory plasma [16,17]. A similar bouncing dynamics has more recently been observed by the the author and co-workers in particle-in-cell simulations of the propagation of a MS soliton in a magnetized plasma slab bounded by vacuum [18].…”

Radial control of electron temperature gradient with optimized operational configuration of double plasma device

“…region and allowed to diffuse into the target region. In the past, these have been widely used in developing a fundamental understanding on the large number of physical phenomenon namely, collisionless electrostatic shock [1], ion beams, ion waves [2,4], ion-acoustic instability [3], linear and nonlinear electrostatic waves [2], plasma waves [5,6], electron plasma waves [7,8] ion-acoustic soliton [9,10], potential relaxation instability [11], double layers [12][13][14][15], etc by realizing minor modifications in its geometry and usage.…”