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Observation of hole Peregrine soliton in a multicomponent plasma with critical density of negative ions
Author(s) -
Sharma S. K.,
Bailung H.
Publication year - 2013
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/jgra.50111
Subject(s) - soliton , amplitude , physics , ion , nonlinear schrödinger equation , plasma , excited state , crest , envelope (radar) , atomic physics , nonlinear system , molecular physics , quantum electrodynamics , quantum mechanics , telecommunications , radar , computer science
Abstract The evolution of hole Peregrine soliton (appearing as a deep trough between two crests) from ion‐acoustic perturbations excited in a multicomponent plasma with critical density of negative ions has been observed. The observed soliton is described by the rational solution of the cubic nonlinear Schrödinger equation, which can appear as an isolated high peak or a deep hole depending on the phase of the underlying carrier wave relative to the envelope. The measured amplitude of the hole Peregrine soliton (depth from crest to trough) is found to be more than twice the background wave height. The experimental observations are compared with the theoretical results obtained from the solution of the cubic nonlinear Schrödinger equation. The frequency spectrum of the Peregrine soliton is analyzed and found to be triangular in shape.