The Near-Saturn Magnetic Field Environment
This thesis focuses on the very high Mach number shock wave that is located sunward of Saturn's strong magnetic field in the continuous high-speed flow of charged particles from the Sun (the solar wind). The author exploits the fact that the Cassini spacecraft is the only orbiter in a unique parameter regime, far different from the more familiar near-Earth space, to provide in-situ insights into the unreachable exotic regime of supernova remnants. This thesis bridges the gap between shock physics in the Solar System and the physics of ultra-high Mach number shocks around the remnants of supernova explosions, since to date research into the latter has been restricted to theory, remote observations, and simulations.
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2 The SunSaturn Connection
3 Spacecraft and Instrumentation
4 Magnetic Field Characterisation of Saturns Bow Shock
5 QuasiPerpendicular High Mach Number Collisionless Shocks
6 The Magnetic Structure of Saturns Magnetosheath
7 Summary and Perspective
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Achilleos Alfvén speed Alfvén wave boundary Burgess Cassini spacecraft Cassini-Huygens characterised collisionless shocks configuration convected Creative Commons license cycle dashed lines dayside distribution downstream draping pattern duskward Earth Earth’s bow shock electric field electron equation equatorial plane fast magnetosonic Figure fluid flux foreshock Geophys Res Lett gyroradius heliocentric heliocentric distance high Mach number hybrid simulations IMF orientations Imperial College London kinetic Kivelson Mach number shocks Magnetic Field Environment magnetic field lines magnetohydrodynamic magnetometer magnetopause magnetosheath measurements meridional angle MHD simulations motion Near-Saturn Magnetic Field normalised orbits original chapter overshoot parameter space Parker spiral Phys planetary plasma proton quasi-parallel quasi-perpendicular shock ramp reconnection reflected ions reformation regime region rotation Saturn’s bow shock Saturn’s magnetosphere Scholer shock crossings shock normal shock wave solar system solar wind Space Sci Rev specular reflection speed Springer Steve Bartlett structure Sulaiman supercritical thesis traversals variability vector velocity wind dynamic pressure