Modulational instability of ion-acoustic waves in plasmas with superthermal electrons

Autor:	H. Gharaee, Hossein Abbasi, Sajedeh Afghah
Rok vydání:	2011
Předmět:	Physics education.field_of_study Wave propagation Population Acoustic wave Electron Plasma Condensed Matter Physics Instability Ion Modulational instability sense organs Atomic physics Nuclear Experiment education
Zdroj:	Physics of Plasmas. 18:032116
ISSN:	1089-7674 1070-664X
DOI:	10.1063/1.3566006
Popis:	Using the reductive perturbation technique, the modulational instability of ion- acoustic waves in a plasma containing superthermal electrons is studied. It is found that the presence of superthermal electrons significantly changes the instability domain. A Lorentzian (kappa) velocity distribution function is used to model superthermal electrons. It is shown that the presence of superthermal electrons reduces the critical frequency of the modulational instability of ion-acoustic waves. Besides, due to the presence of the superthermal electrons, ion-acoustic waves are unstable on a vaster region. Moreover, the modulational instability growth rate is larger for a larger population of superthermal electrons.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cd85065782943c0726f07702393c45f4 https://doi.org/10.1063/1.3566006 Zobrazit plný text záznamu