Kinetic study of ion acoustic twisted waves with kappa distributed electrons

Journal Article · Sun May 15 04:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947555· OSTI ID:22600177

Arshad, Kashif; Aman-ur-Rehman, ^[1]; Mahmood, Shahzad ^[1]

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1. Pakistan Institute of Engineering and Applied Sciences, P. O. Nilore, Islamabad 45650 (Pakistan)

The kinetic theory of Landau damping of ion acoustic twisted modes is developed in the presence of orbital angular momentum of the helical (twisted) electric field in plasmas with kappa distributed electrons and Maxwellian ions. 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 ion acoustic twisted waves in a non-thermal plasma. The strong damping effects of ion acoustic twisted waves at low values of temperature ratio of electrons and ions are also obtained by using exact numerical method and illustrated graphically, where the weak damping wave theory fails to explain the phenomenon properly. The obtained results of Landau damping rates of the twisted ion acoustic wave are discussed at different values of azimuthal wave number and non-thermal parameter kappa for electrons.

• OSTI ID: 22600177
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 23; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOLTZMANN-VLASOV EQUATION
CYLINDRICAL CONFIGURATION
DISTRIBUTION
DISTRIBUTION FUNCTIONS
ELECTRIC FIELDS
ELECTRONS
GAUSS FUNCTION
GEOMETRY
ION ACOUSTIC WAVES
IONS
LANDAU DAMPING
ORBITAL ANGULAR MOMENTUM
POISSON EQUATION