| About the Authors |
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XI | |
| 1 Introduction |
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1 | (46) |
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1 | (4) |
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1.2 Plasmas in Astrophysics |
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5 | (4) |
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1.2.1 Plasmas Are Ubiquitous |
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5 | (1) |
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1.2.2 The Magnetosphere of Stars |
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6 | (1) |
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6 | (1) |
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1.2.4 Planetary Magnetospheres |
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7 | (2) |
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1.3 Upstream of Plasma Physics: Electromagnetic Fields and Waves |
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9 | (26) |
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1.3.1 Electromagnetic Fields |
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9 | (7) |
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1.3.2 Transverse and Longitudinal Electromagnetic Field |
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16 | (1) |
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1.3.3 Electromagnetic Fields in Vacuum |
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17 | (7) |
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1.3.4 Plane Waves in a Plasma |
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24 | (1) |
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1.3.5 Electromagnetic Components of Plane Plasma Waves |
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25 | (1) |
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1.3.6 Some General Properties of Plane Wave Polarization and Dispersion |
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26 | (1) |
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1.3.7 Electrostatic Waves |
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27 | (1) |
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1.3.8 Wave Packets and Group Velocity |
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28 | (1) |
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1.3.9 Propagation of Plane Waves in a Weakly Inhomogeneous Medium |
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28 | (2) |
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1.3.10 Useful Approximations of the Maxwell Equations in Plasma Physics |
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30 | (5) |
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1.4 Upstream of Plasma Physics: The Motion of Charged Particles |
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35 | (12) |
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1.4.1 The Motion of the Guiding Center |
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35 | (4) |
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1.4.2 Adiabatic Invariants |
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39 | (3) |
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1.4.3 The Motion of a Particle in a Wave |
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42 | (5) |
| 2 Plasma Descriptions and Plasma Models |
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47 | (30) |
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2.1 Distribution Function and Moments |
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47 | (11) |
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2.1.1 From Individual Particles to Kinetic Description |
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47 | (3) |
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2.1.2 Kinetic Description and First Order Moments |
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50 | (3) |
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2.1.3 Higher-Order Moments |
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53 | (1) |
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2.1.4 Moments for a Mixture of Populations |
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54 | (1) |
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2.1.5 Nontrivial Generalization of the Fluid Concepts |
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55 | (2) |
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2.1.6 Fluid vs. Kinetic Description: An Example |
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57 | (1) |
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2.2 From Kinetic to Fluid Equations |
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58 | (9) |
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58 | (4) |
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2.2.2 Lagrangian Form of the Moment Equations |
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62 | (1) |
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2.2.3 Fluid Equations: Necessity of a Closure Equation |
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63 | (2) |
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2.2.4 Collisional Limit: Fluid Dynamics and Thermodynamics |
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65 | (2) |
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67 | (7) |
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67 | (2) |
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2.3.2 Particle in Cell Codes (PIC) |
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69 | (4) |
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2.3.3 Perturbative PIC Codes |
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73 | (1) |
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74 | (1) |
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75 | (2) |
| 3 The Magnetized Plasmas |
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77 | (28) |
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77 | (5) |
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3.1.1 The Ideal MHD System |
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77 | (2) |
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3.1.2 The Ideal Ohm's Law |
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79 | (3) |
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3.2 Establishing the MHD Model |
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82 | (6) |
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3.2.1 Large-Scale Conditions of Validity |
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85 | (1) |
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3.2.2 Departures from MHD: Multi-Fluid and Kinetic Effects |
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86 | (2) |
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3.3 Dimensional Analysis and Plasma Characteristic Scales |
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88 | (17) |
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3.3.1 Dimensional Analysis: The General Methods |
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88 | (4) |
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3.3.2 Temporal and Spatial Scales, Adimensional Numbers |
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92 | (10) |
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3.3.3 Dispersive and Dissipative Effects |
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102 | (1) |
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3.3.4 Physical Importance of the Dimensionless Parameters |
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103 | (2) |
| 4 Collisional-Collisionless |
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105 | (30) |
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4.1 Notion of Collisions in Plasma Physics |
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105 | (14) |
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4.1.1 Coulomb Interaction: A Long Range Interaction |
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105 | (4) |
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109 | (4) |
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4.1.3 The Debye Length and the Notion of Debye "Screening" |
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113 | (2) |
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115 | (2) |
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117 | (2) |
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4.2 Notion of Dissipation |
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119 | (16) |
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4.2.1 Transfers of Energy and Dissipation |
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119 | (1) |
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4.2.2 The Concept of Dissipation in Collisional Fluids |
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120 | (3) |
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123 | (2) |
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4.2.4 Irreversibility and Damping |
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125 | (2) |
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4.2.5 The Notion of Reversibility Depends on the Description |
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127 | (5) |
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132 | (3) |
| 5 Waves in Plasmas |
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135 | (64) |
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136 | (4) |
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5.1.1 Polarization of the MHD Waves |
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137 | (2) |
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5.1.2 Application: Alfven and MHD Waves in the Earth's Magnetosphere |
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139 | (1) |
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5.2 Transport Induced by Waves |
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140 | (6) |
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5.2.1 Alfven Wave Pressure |
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141 | (5) |
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146 | (8) |
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146 | (2) |
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5.3.2 Parallel Propagation |
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148 | (2) |
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5.3.3 Perpendicular Propagation: Ordinary and Extraordinary Waves |
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150 | (1) |
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5.3.4 Application: Plasma Cut-offs and Limits to the Radio Astronomy |
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151 | (1) |
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5.3.5 Application: The Dispersion of Radio Waves from Pulsars |
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152 | (1) |
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5.3.6 Application: Faraday Rotation in the Interstellar Medium |
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153 | (1) |
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154 | (4) |
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5.5 Collisional Damping in Fluid Theories |
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158 | (10) |
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5.5.1 Dissipative Effects and Entropy |
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158 | (3) |
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5.5.2 Dissipation and Collisions |
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161 | (2) |
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5.5.3 Strongly Collisional Systems |
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163 | (1) |
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5.5.4 Heat Conduction: From Collisional to Collisionless |
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164 | (3) |
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5.5.5 The Thermoelectric Field: Another Consequence of Collisions between Ions and Electrons |
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167 | (1) |
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5.6 Collisionless Damping |
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168 | (25) |
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5.6.1 Number of Eigenmodes: Fluid vs. Kinetic |
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168 | (1) |
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5.6.2 A Simple Example: The Langmuir Wave, from Fluid to Kinetic |
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169 | (1) |
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5.6.3 Fluid Treatment of the Langmuir Wave: Choice of a Closure |
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170 | (6) |
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5.6.4 Kinetic Treatment of the Langmuir Wave: Landau Damping |
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176 | (16) |
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5.6.5 Other Types of Kinetic Damping |
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192 | (1) |
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193 | (6) |
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5.7.1 Real Space Instabilities: Fluid Treatment |
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193 | (1) |
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5.7.2 Velocity Space Instabilities: Kinetic Treatment |
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193 | (1) |
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5.7.3 Weak Kinetic Effects |
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194 | (2) |
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5.7.4 An Example: The Two-Stream Instability |
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196 | (3) |
| 6 Nonlinear Effects, Shocks, and Turbulence |
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199 | (76) |
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6.1 Collisionless Shocks and Discontinuities |
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199 | (14) |
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6.1.1 Nonlinear Propagation, Discontinuities, Jumps |
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199 | (6) |
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6.1.2 Shocks and Other Discontinuities in a Magnetized Plasma |
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205 | (3) |
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6.1.3 The Unmagnetized Shock Wave |
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208 | (1) |
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6.1.4 A Particular Case: The Tangential Discontinuity |
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208 | (3) |
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6.1.5 Example: The Terrestrial Bow Shock, the Foreshocks |
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211 | (2) |
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6.2 Turbulence (Mainly MHD) |
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213 | (40) |
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6.2.1 Hydrodynamics: Equations, Shocks |
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216 | (4) |
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6.2.2 Hydrodynamics: 3D Incompressible Turbulence |
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220 | (5) |
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6.2.3 MHD Turbulence - Introduction |
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225 | (5) |
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6.2.4 Weak Isotropic (IK) Regime |
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230 | (5) |
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6.2.5 Anisotropic Regimes |
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235 | (15) |
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250 | (3) |
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6.3 Nonlinear Kinetic Physics |
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253 | (22) |
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6.3.1 Nonlinear Electrostatic Waves |
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254 | (1) |
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255 | (8) |
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6.3.3 The Nonlinear Interaction of Many Electrostatic Waves of Low Amplitude |
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263 | (2) |
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6.3.4 Quasi-Linear Theory |
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265 | (4) |
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6.3.5 Trapping versus Quasi-Linear Diffusion |
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269 | (6) |
| 7 Flow and Particle Acceleration Processes |
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275 | (44) |
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7.1 Flow Acceleration and Heating in a Collisional Fluid |
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275 | (19) |
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275 | (4) |
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7.1.2 Expressions for the Polytropic Fluids |
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279 | (2) |
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7.1.3 Bernoulli's Principle |
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281 | (1) |
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281 | (2) |
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283 | (1) |
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284 | (7) |
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7.1.7 Possible Routes to Turbulence in Stellar Winds |
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291 | (2) |
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293 | (1) |
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7.2 Magnetic Reconnection |
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294 | (11) |
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7.2.1 Conservation of Connections vs. Reconnection |
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294 | (2) |
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7.2.2 Departure from the Ideal Ohm's Law: Microscopic Mechanisms and Macroscopic Consequences |
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296 | (1) |
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7.2.3 Flow Acceleration by Reconnection |
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297 | (5) |
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7.2.4 Tearing Instability |
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302 | (2) |
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304 | (1) |
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7.3 Kinetic Acceleration Processes in Magnetospheres |
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305 | (14) |
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7.3.1 Substorms and Auroras in the Earth's Magnetosphere |
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305 | (2) |
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7.3.2 Fermi Acceleration in the Magnetosphere |
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307 | (1) |
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7.3.3 Acceleration by a Forced Current Forced along Convergent Magnetic Field Lines |
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307 | (4) |
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7.3.4 Acceleration by an Electric Current Forced by a Wave |
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311 | (1) |
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7.3.5 Acceleration by an Alfven Wave (NonMHD) Parallel Electric Field |
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312 | (3) |
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7.3.6 Resonant Acceleration by a Wave |
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315 | (1) |
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7.3.7 Acceleration by a Wave of Short Length |
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316 | (1) |
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7.3.8 Application: Acceleration in the Earth's Magnetosphere |
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317 | (2) |
| 8 Transport and Acceleration of Cosmic Rays |
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319 | (38) |
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8.1 The Problem of Transport |
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320 | (16) |
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8.1.1 The Magnetic Field: Obstruction to Transport |
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320 | (2) |
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8.1.2 Magnetic Irregularities: Transport Agent |
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322 | (5) |
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8.1.3 Other Diffusion Coefficients |
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327 | (3) |
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8.1.4 Transport Equation of Cosmic Rays |
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330 | (4) |
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8.1.5 Distribution of Suprathermal Particles Crossing a Shock |
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334 | (2) |
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8.1.6 From Transport to Acceleration |
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336 | (1) |
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8.2 Fermi Acceleration of Cosmic Rays |
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336 | (21) |
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8.2.1 The Basic Fermi Process |
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338 | (8) |
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8.2.2 Fermi Process at a Nonrelativistic Shock |
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346 | (4) |
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8.2.3 Astrophysical Application: Cosmic Rays and Supernovae |
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350 | (1) |
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8.2.4 Astrophysical Application: Synchrotron Sources |
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351 | (2) |
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8.2.5 Generation of Magnetic Turbulence |
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353 | (1) |
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8.2.6 Why Are Fermi Processes Favored at Shocks? |
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354 | (1) |
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8.2.7 What about the Relativistic Regime of Fermi Acceleration? |
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355 | (2) |
| 9 The Kinetic-Fluid Duality |
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357 | (26) |
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357 | (11) |
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9.1.1 Small Amplitude Ballistic Fluctuations |
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358 | (3) |
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9.1.2 Large-Amplitude Ballistic Fluctuations |
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361 | (5) |
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9.1.3 Quasi-Fluid Behavior of a Collisionless Plasma: Launching a 2D Plasma Bullet |
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366 | (2) |
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9.2 Solar and Stellar Wind Expansion |
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368 | (15) |
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9.2.1 A Simple Noncollisional Wind |
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368 | (2) |
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9.2.2 More Sophisticated Noncollisional Wind Models |
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370 | (1) |
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9.2.3 Charge Neutralizing Field for a Plasma in a Gravitational Field |
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371 | (3) |
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9.2.4 Qualitative Radial Profile of the Total Proton Potential |
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374 | (2) |
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9.2.5 Charge Neutralizing Electric Field and Dreicer Field |
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376 | (1) |
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9.2.6 Electric Field Intensity at the Sonic Radius rs |
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377 | (1) |
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9.2.7 Effective Closure for the Solar Wind |
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377 | (6) |
| Appendix |
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383 | (12) |
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383 | (2) |
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A.1.1 Vectors and Tensors |
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383 | (1) |
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383 | (1) |
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384 | (1) |
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A.2 Asymptotic Expansions and Adiabatic Invariants |
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385 | (8) |
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A.2.1 Multiscale Expansion |
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385 | (3) |
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A.2.2 The Adiabatic Invariants |
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388 | (2) |
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A.2.3 Derivation of the Guiding Center Equations |
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390 | (3) |
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A.3 Fokker-Planck Equation, First Order Term |
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393 | (2) |
| References |
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395 | (10) |
| Index |
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405 | |