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Fig. An ion hole creared by charged debris.
Charged debris in a flowing plasma
Charged debris in a flowing plasma can give rise to various nonlinear structures. It is now shown clearly that the nonlinear structures are fundamentally different and depends on the nature of the debris - positively or negatuvely charged.
While positively charged debris give rise to dissipation-less shock waves, negatively charged debris produce the so-called pinned solitons.
Rinku Deka and Madhurjya P Bora, Physics of Plasmas 27, 043701 (2020)
Fig. Formation of dissipation-less shock waves (DSW).
Debris-induced nonlinearities in a PINI plasma
In this work, we explore different nonlinear structures excited by a moving charged debris in a multicomponent PINI plasma and also look at the similarities of their characteristics with di!erent experimental results. The complete plasma system is modeled using a forced Korteweg–de Vries (fKdV) equation and results from theoretical analysis are verified using a 1D multi-fluid flux-corrected transport simulation code (mFCT)
Rinku Deka and Madhurjya P Bora, Physics of Plasmas 25, 103704 (2018)
Fig. FCT simulation results showing evolution of a DSW in the precursor region over time for a negatively charged debris perturbation. Shaded region corresponds to the perturbation site.
Fig. FCT simulation results of propagation of nonlinear wave in a PINI plasma with an embedded external positively charged debris.
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