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Modulational instability of ion-acoustic wave envelopes in magnetized quantum electron-positron-ion plasmas
Umeå University, Faculty of Science and Technology, Department of Physics.
2010 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 17, no 1, 012103Article in journal (Refereed) Published
Abstract [en]

The amplitude modulation of quantum ion-acoustic waves (QIAWs) along an external magnetic field is studied in a quantum electron-positron-ion (e-p-i) magnetoplasma. Reductive perturbation technique is used to derive the three-dimensional nonlinear Schroumldinger equation which governs the slow modulation of QIAW packets. Accounting for the effects of the electron to ion number density ratio (mu), the normalized ion-cyclotron frequency (omega(c)) as well as the ratio (H) of the "plasmonic energy density" to the Fermi energy, new regimes for the modulational instability of QIAWs are obtained and analyzed. In contrast to one-dimensional unmagnetized e-p-i plasmas, the instability growth rate is shown to suppress with increasing mu or decreasing the values of H. The predicted results could be important for understanding the salient features of modulated QIAW packets in dense astrophysical plasmas as well as to the next generation intense laser solid density plasma experiments.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2010. Vol. 17, no 1, 012103
Keyword [en]
modulational instability, nonlinear equations, perturbation theory, plasma confinement, plasma density, plasma ion acoustic waves, plasma magnetohydrodynamics, Schrodinger equation
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:umu:diva-109054DOI: 10.1063/1.3293119ISI: 000274179600007OAI: diva2:856241
Available from: 2015-09-23 Created: 2015-09-17 Last updated: 2015-10-06Bibliographically approved

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Misra, Amar P
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