Investigation of the Magnetosphere of Ganymede with Galileo's Energetic Particle Detector

Ph.D. dissertation by Shawn M. Stone, University of Kansas, 1999.

Copyright 1999 by Shawn M. Stone.  Used with permission.

Detailed Outline of Dissertation

• Dedication and Acknowledgments
• Chapter 1 Introduction
  • Tables 1.1 and 1.2
  • 1.1 Anatomy of a Magnetosphere (Subsections 1.1.1 and 1.1.2; Figure 1)
  • 1.2 Satellites Embedded Within Magnetospheres (Subsections 1.2.1 and 1.2.2; Figures 1.2 - 1.11; Table 1.3)
  • 1.3 Discovery of Ganymede's Magnetic Field (Figures 1.12 - 1.17)
  • 1.4 The Magnetosphere of Ganymede (Figures 1.18 - 1.23; Table 1.4)
  • 1.5 Charged Particles in the Vicinity of Ganymede (Figures 1.24 - 1.34)
  • 1.6 Thesis Overview
• Chapter 2 Single Particle Theory
  • 2.1 Maxwell's Equations and the Lorentz Force (Figure 2.1)
  • 2.2 The Guiding Center Equation of Motion (Subsections 2.2.1 and 2.2.2; Figures 2.2 - 2.5)
  • 2.3 Adiabatic Invariants (Subsection 2.3.1 and Figures 2.6 and 2.7; Subsection 2.3.2; and Subsection 2.3.3 and Figure 2.8)
  • 2.4 Pitch Angle Diffusion (Figure 2.9; Subsection 2.4.1 and Figure 2.10)
  • 2.5 Electric Fields (Subsection 2.5.1 and Figures 2.11 - 2.13; Subsection 2.5.2)
• Chapter 3 Instrument Characteristics and Coordinate Systems
  • Figure 3.1
  • 3.1 The EPD Instrument (Figures 3.2 - 3.3 and Table 3.1)
  • 3.2 Low-Energy Magnetospheric Measurement System (LEMMS) (Subsection 3.2.1, Figure 3.4, and Table 3.2; Subsection 3.2.2 and Table 3.3)
  • 3.3 Count Rate and Differential Particle Flux (Figures 3.5 - 3.7 and Table 3.4)
  • 3.4 Inertial Reference Frames and Coordinate Systems (Figure 3.8 and Table 3.5; Subsection 3.4.1 and Figure 3.9; Subsection 3.4.2 and Figure 3.10; Subsection 3.4.3 and Figure 3.11)
  • 3.5 Coordinate Transformations and SPICE Kernels (Subsection 3.5.1 and Figure 3.12; Subsection 3.5.2; Subsection 3.5.3 and Figure 3.13)
  • 3.6 State Vectors and EPD Look Directions (Subsection 3.6.1; Figures 3.14 - 3.15; Tables 3.6 and 3.7)
• Chapter 4 Magnetic Field Models
  • Figure 4.1
  • 4.1 Offset Tilted Dipole Models
  • 4.2 Spherical Harmonic Models (Table 4.1)
  • 4.3 Modeling of External Sources: Magnetopause and Tail Fields (Subsection 4.3.1, Figure 4.2, and Table 4.2; Subsection 4.3.2, Figures 4.3 - 4.4, and Table 4.3; Subsection 4.3.3 and Figures 4.5 - 4.7)
  • 4.4 The O6 Multipole Model of the Jovian Internal Field (Table 4.4 and Figure 4.8)
  • 4.5 The Magnetodisk Current Sheet: Vector Potential Model (Figures 4.9 - 4.12)
  • 4.6 The Magnetodisk Current Sheet: Euler Potential Model (Figures 4.13 - 4.14 and Table 4.5)
  • 4.7 Ganymede Field: Construction of Model 1 (Table 4.6)
  • 4.8 Ganymede Field: Construction of Model 2 (Table 4.7; Subsection 4.8.1, Tables 4.8 and 4.9; and Figures 4.15 - 4.26; Subsection 4.8.2, Figures 4.27 - 4.28, and Table 4.10; and Subsection 4.8.3 and Figures 4.29 - 4.34)
  • 4.9 The Divergence of Magnetic Field in Models M1 and M2 (Figures 4.35 - 4.36)
  • 4.10 Using the EPD Instrument to Check for Aberration of the Plasma Direction (Table 4.11)
• Chapter 5 The Simulation: Time Reversed Particle Following
  • 5.1 Setting Up the Encounter (Subsection 5.1.1 and Figure 5.1; Subsection 5.1.2 and Figure 5.2)
  • 5.2 Time Reversed Particle Tracing (Figure 5.3; Subsection 5.2.1 and Figures 5.4 - 5.5; Subsection 5.2.2, Figures 5.6 - 5.7, and Tables 5.1 - 5.2)
  • 5.3 Implementation of Pitch Angle Scattering (Figures 5.8 - 5.9)
  • 5.4 Electric Fields
  • 5.5 Force Pitch and Phase Mode
  • 5.6 Stepping Through the Encounter: Constructing the Simulated Count Rate (Figures 5.10 - 5.11)
• Chapter 6 Time Reversed Particle Results:  G2 Encounter
  • 6.1 Encounter Geometry and Overview of the G2 Encounter (Figures 6.1 - 6.5)
  • 6.2 Inbound Results (Figures 6.6 - 6.9; Subsection 6.2.1, Figures 6.10 - 6.37 and Tables 6.1 - 6.5; Subsection 6.2.2, Figures 6.38 - 6.53, and Tables 6.6 - 6.7)
  • 6.3 Closest Approach Results (Figures 6.54 - 6.55; Subsection 6.3.1, Figures 6.56 - 6.84, and Tables 6.8 - 6.10; Subsection 6.3.2 and Figures 6.85 - 6.103)
  • 6.4 Outbound Results (Figures 6.104 - 6.105; Subsection 6.4.1 and Figures 6.106 - 6.124; Subsection 6.4.2, Figures 6.125 - 6.152, and Tables 6.11 - 6.13)
• Chapter 7 Corotational & Parallel Electric Fields:  G2 Encounter
  • 7.1 Feature G2-18:56:31, the Addition of Corotational Electric Field (Figures 7.1 - 7.43 and Tables 7.1 - 7.6)
  • 7.2 Feature G2-19:10:51, the Addition of Parallel Electric Field (Figures 7.44 - 7.55 and Tables 7.7 - 7.8)
• Chapter 8 Discussion and Conclusions
  • 8.1 The Model M2 Magnetic Field Model and Its Implications for the Plasma Environment Near Ganymede for G2 and G7 (Tables 8.1 - 8.2)
  • 8.2 The Ion Null-Point Interactions During the Inbound Pass at G2
  • 8.3 Correspondence of the Simulated Loss Cones and Anti-Loss Cones to the Observed Data for the G2 and G7 Encounters (Tables 8.3 - 8.8)
  • 8.4 Pitch Angle Scattering Results for G2 and G7 (Tables 8.9 - 8.14)
  • 8.5 Corotational and Parallel Electric Field Implications (Tables 8.15 - 8.16)
  • 8.6 Conclusions and Proposal for Future Study (Figures 8.1 - 8.2)
• References
• Appendix A The SPICE Kernel System
• Appendix B G7 Results (Figures B1 - B45)
• Appendix C Additional G2 Results (Figures C1 - C54, plus many additional, un-numbered, figures)

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