I= THE WAVE PROPAGATION IN NON-UNIFORM DISSIPATIVE PLASMAS
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Title of Thesis
THE WAVE PROPAGATION IN NON-UNIFORM DISSIPATIVE PLASMAS

Author(s)
Hamid Saleem
Institute/University/Department Details
Department of Physics/ Quaid-i-Azam University, Islamabad
Session
1993
Subject
Physics
Number of Pages
106
Keywords (Extracted from title, table of contents and abstract of thesis)
wave propagation, non-uniform dissipative plasmas, wkb-approximation, magneto hydrodynamic modes, mhd, alfven waves, eikonal method, eikonal approximation, magnetohydrodynamics, drift waves

Abstract
The wave propagation in non-uniform magnetized dissipative plasmas is studied by using WKB-approximation. It is found that in the presence of pressure perturbation the ansatz for the state vector V has to be modified by including the non-linear part V2 in it. Then the traditional WKB expansion procedure becomes very cumbersome to recover the energy conservation law. To overcome this difficulty, the WKB-approximation has been used in the lowest order to obtain the normal modes of the system and the higher order local energy conservation law is obtained by direct method The magneto hydrodynamic modes and electromagnetic drift waves have been studied by using MHD and two fluid models, respectively. Then by analyzing the wave energy equations the growth or damping rates for several low frequency modes are calculated. The shear alfven waves are found to be damped due to dissipative mechanisms while the magneto sonic waves can become unstable under certain conditions

Download Full Thesis
781.53 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents 0
140.84 KB
2 1 Introduction 1
100.34 KB
  1.1 Motivation 1
  1.2 The Plan Of The Thesis 9
3 2 Generalization Of Eikonal Method 10
100.72 KB
  2.1 The Eikonal Approximation 11
  2.2 The Amplitude Variation 13
  2.3 Energy Conservation Law 15
  2.4 Discussion 18
4 3 MHD Wave Propagation And Local Energy Balance 23
191.68 KB
  3.1 Magnetohydrodynamics 23
  3.2 Lowest Order WKB Solution To MHD Equations 27
  3.3 MHD Local Energy Balance 35
  3.4 Analysis Of Energy Law 40
  3.5 Discussion 41
5 4 Drift Wave Propagation And Local Energy Balance 47
240.76 KB
  4.1 Drift Waves 47
  4.2 Lowest Order Solution Of Two Fluid Equations 50
  4.3 Balance Of Wave Energy 68
  4.4 Discussion 73
6 5 Concluding Remarks And Open Questions 78
76.54 KB
7 6 Bibliography 89
61.66 KB