Abstract
en waves including both ion kinetic effects and ion acoustic waves (KTDNLS: kinetically modified triple-degenerated derivative nonlinear Schrodinger equation) is discussed. The consistency with the kinetic model of the pon- deromotive density fluctuation (KDNLS: kinetically modified derivative nonlinear Schrodinger equation) is set as the constraint to the resultant model. To close the system, modeling of the second-order specific heat ratio is demonstrated. The transverse stability analysis of Alfv´ en waves using the KTDNLS is carried out. The resultant nonlinear evolution equation is simi- lar to the one obtained from the KDNLS, which shows that the ion kinetic effects enhance the transverse instabilities.
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