Alfvén wave propagation in a partially ionized plasma

2004 ◽  
Vol 11 (4) ◽  
pp. 1358-1365 ◽  
Author(s):  
Christopher Watts ◽  
Jeremy Hanna
Keyword(s):  
Wave Propagation ◽  
Alfven Wave ◽  
Partially Ionized

Resonances in submillimetric Alfvén wave propagation in Bismuth

1967 ◽  
Vol 5 (9) ◽  
pp. 719-722 ◽  
Author(s):  
D.L. Carter ◽  
J.C. Picard
Keyword(s):  
Wave Propagation ◽  
Alfven Wave

Kinetic Alfven wave propagation in cylindrical Tokamak

1982 ◽  
Vol 24 (9) ◽  
pp. 1027-1041 ◽  
Author(s):  
S -I Itoh ◽  
K Itoh ◽  
K Nishikawa
Keyword(s):  
Wave Propagation ◽  
Alfven Wave ◽  
Kinetic Alfvén Wave ◽  
Kinetic Alfven Wave

scholarly journals Alfvén wave propagation and dissipation in a 3D-structured compressible plasma

2003 ◽  
Vol 412 (2) ◽  
pp. 529-539 ◽  
Author(s):  
F. Malara ◽  
M. F. De Franceschis ◽  
P. Veltri
Keyword(s):  
Wave Propagation ◽  
Alfven Wave ◽  
Compressible Plasma

scholarly journals Propagation of Alfvén waves in the magnetotail during substorms

2009 ◽  
Vol 27 (5) ◽  
pp. 2237-2246 ◽  
Author(s):  
R. L. Lysak ◽  
Y. Song ◽  
T. W. Jones
Keyword(s):  
Wave Propagation ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Alfvén Waves ◽  
Focused Attention ◽  
Magnetospheric Substorms ◽  
Related Field ◽  
Convective Flows ◽  
Standard Models ◽  
Energy And Momentum

Abstract. Recent observations from the THEMIS mission have focused attention on the timing of events in the magnetotail during magnetospheric substorms and other periods of geomagnetic activity. Standard models of substorms have generally emphasized convective flows as the major source of energy and momentum transport; however, Alfvén wave propagation can also be an important transport mechanism. The propagation of Alfvén waves and the related field-aligned currents are studied by means of ideal MHD simulation of the tail. Perturbations of the cross-tail current can lead to the generation of such waves, and the resulting propagation both through the tail and along the plasma sheet boundary layer can lead to enhanced transport. Implications of this wave propagation on the interpretation of results from the THEMIS mission will be discussed.

Fast Alfven wave propagation in a deuterium-hydrogen Tokamak plasma

1987 ◽  
Vol 29 (1) ◽  
pp. 93-103 ◽  
Author(s):  
H Akiyama ◽  
K L Wong ◽  
J Gahl ◽  
M Kristiansen ◽  
M Hagler
Keyword(s):  
Wave Propagation ◽  
Alfven Wave ◽  
Tokamak Plasma

A MATHEMATICAL MODEL FOR ANALYSIS OF WAVE PROPAGATION IN A LINEARIZED VERTICALLY NONUNIFORM PARTIALLY IONIZED GAS

1966 ◽  
Vol 44 (5) ◽  
pp. 1047-1065 ◽  
Author(s):  
Harold R. Raemer
Keyword(s):  
Wave Propagation ◽  
Differential Equations ◽  
Numerical Solutions ◽  
Mhd Waves ◽  
Mathematical Treatment ◽  
Algebraic Differential Equation ◽  
Neutral Gas ◽  
Partially Ionized ◽  
Analytical Approaches ◽  
Adiabatic State

Wave propagation in fully and partially ionized gases, with and without magnetic fields, has been treated by several workers; e.g., Tanenbaum and Mintzer (1962) obtained dispersion relations for a linearized and spatially uniform gas of electrons, positive ions, and neutrals. The present paper discusses the basic formulation and mathematical treatment of wave propagation in a linearized electron – ion – neutral gas, with static magnetic field, in which ambient-gas parameters vary arbitrarily vertically and are uniform horizontally.A standard formulation of the general problem is discussed via Boltzmann and Maxwell equations. By momentum-space averaging, the Boltzmann equation yields motion, continuity, and dynamic adiabatic state equations. These are combined to yield neutral and plasma equations of motion, continuity, and adiabatic state and a generalized Ohm's Law. Steady-state plane-wave solutions of the form exp[−i(ωt – kxx)] are assumed, reducing the x, y, and t dependence to algebraic relations, but the equations remain differential in z. The system consists of 10 simultaneous coupled ordinary first-order complex differential equations and 11 simultaneous complex algebraic equations in 21 complex unknowns.The second part of the paper is a discussion of the solution of this coupled algebraic differential equation system, equivalent to the system arising in the analysis of coupled linear electrical networks. Referring to the literature of differential equations and modern automatic control systems, various purely analytical approaches are discussed with emphasis on their deficiencies in obtaining practical numerical results with an arbitrary z variation. The Runge–Kutta step-by-step-procedure was invoked eventually and a Fortran program based on this technique was written. The program can be used to obtain accurate numerical solutions to many problems involving wave propagation in a linearized, vertically nonuniform electron – ion – neutral gas without requiring drastic simplifying assumptions for the vertical nonuniformity. This program can be used, by changing input parameter values, to treat such diverse problems as the perturbing effect of acoustic–gravity waves on ionospheric electron density, electromagnetic wave propagation in the vertically inhomogeneous ionosphere, MHD waves high in the ionosphere, or various kinds of wave propagation in prepared plasmas with a one-dimensional inhomogeneity. Numerical solutions for the acoustic – gravity wave – plasma interaction problem and their interpretation will be reported in a later paper.

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