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Author Arshad, Kashif ♦ Aman-ur-Rehman ♦ Mahmood, Shahzad
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ CYLINDRICAL CONFIGURATION ♦ DEBYE LENGTH ♦ DISTRIBUTION FUNCTIONS ♦ ELECTRIC FIELDS ♦ ELECTRONS ♦ LANDAU DAMPING ♦ LANGMUIR FREQUENCY ♦ ORBITAL ANGULAR MOMENTUM ♦ PLASMA ♦ POISSON EQUATION ♦ WAVELENGTHS
Abstract The kinetic theory of Landau damping of Langmuir twisted modes is investigated in the presence of orbital angular momentum of the helical (twisted) electric field in plasmas with kappa distributed electrons. The perturbed distribution function and helical electric field are considered to be decomposed by Laguerre-Gaussian mode function defined in cylindrical geometry. The Vlasov-Poisson equation is obtained and solved analytically to obtain the weak damping rates of the Langmuir twisted waves in a nonthermal plasma. The strong damping effects of the Langmuir twisted waves at wavelengths approaching Debye length are also obtained by using an exact numerical method and are illustrated graphically. The damping rates of the planar Langmuir waves are found to be larger than the twisted Langmuir waves in plasmas which shows opposite behavior as depicted in Fig. 3 by J. T. Mendoça [Phys. Plasmas 19, 112113 (2012)].
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 11


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