The Magnetosphere and Plasmasphere CSI 769 3 rd section, Oct. – Nov. 2005 J. Guillory.

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Presentation transcript:

The Magnetosphere and Plasmasphere CSI rd section, Oct. – Nov J. Guillory

Lecture 8 (Oct.25) Bow shock scattering; Magnetosphere structure, charged particle orbits –Advance reading: Gombosi Ch.1 & 6 (and/or Parks Ch. 4, 8 &10). and Sci. Am. Apr. 1991: Collisionless Shock Waves Lecture 9 (Nov. 1) Dawn-dusk electric field; gyrokinetic codes; magnetotail & current sheet –Advance reading: Gombosi Ch. 7 & 14, Parks Sec. 7.8 & 11.5) Lecture 10 (Nov. 8) MHD codes & boundary conditions; parallel E-fields & precipitation; satellite diagnostics –Advance reading: Gombosi Ch. 4, Parks Sec. 7.7 In conjunction with the last topic: –Joel Fedder (NRL) is scheduled for a Space Sciences Seminar on his MHD magnetosphere code, Wed. 10/26, 3:00 p.m., 206 –Please attend.

Incoming particle scattering Stochastic Injection of Energetic Particles from Bow Shock and from Tailward reconnection region Nonadiabatic because gyroradius ~ B scale-length locally Particle orbit diffusion due to field fluctuations

Magnetic field geometry

Charged particle orbits, static B: Fast gyration about field line North-south bounce due to “magnetic mirror” force Slow east-west drift due to inhomogeneous magnetic field ExB drifts due to electric fields

Magnetosphere Simulation Particle codes, incl. gyro-averaged particle followers ( e.g. Mary Hudson’s at Dartmouth ) Fluid (MHD) codes –Fedder-Lyon-Mobarry code (NRL) –Spicer’s code(s): Odin etc. –BATSRUS (U. Michigan) Hybrid (particles and MHD) codes –Rice MSM code

Models are available for community use: –CCMC: –UCLA: Source codes in public domain: –GEDAS (Japan, T. Ogino) (Japan, T. ) u.ac.jp/simulation/jst2k/hpf02.html u.ac.jp/simulation/jst2k/hpf02.html –BATSRUS: –NRL: FCTMHD3D (C.R. DeVore) AMRMHD3D (P. MacNeice) –Zeus 3D MHD (Michael Norman): –CFD Codes:

Satellite sensors

Living With A Star Research Network Solar Dynamics Observatory Pole Sitter Radiation Belt Mappers Ionospheric Mappers L 1 Solar Sentinel L2L2 Distributed network of spacecraft providing continuous observations Geospace Dynamics Nework with constellations of smallsats in key regions of geospace.

Radiation Belt Mappers Understand origin and dynamics of the radiation belts. Determine time & space-dependent evolution of penetrating radiation during magnetic storms. First Element: multiple spacecraft in 3 petal equatorial orbits; in-situ measurements. Second Element: Add higher latitude coverage.

Cluster & Vortex

Cluster & Doublestar (DSP)

Image Satellite ENA sensors