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The Magnetosphere and Plasmasphere

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

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The Magnetosphere and Plasmasphere

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

  2. 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.

  3. 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

  4. Magnetic field geometry

  5. 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

  6. 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

  7. Models are available for community use: • CCMC: http://ccmc.gsfc.nasa.gov/ • UCLA: http://www-ggcm2.igpp.ucla.edu/ • Source codes in public domain: • GEDAS (Japan, T. Ogino) (Japan, T.) http://gedas22.stelab.nagoya-u.ac.jp/simulation/jst2k/hpf02.html • BATSRUS: http://csem.engin.umich.edu/ • NRL: http://www.lcp.nrl.navy.mil/hpcc-ess/software.html • FCTMHD3D (C.R. DeVore) • AMRMHD3D (P. MacNeice) • Zeus 3D MHD (Michael Norman): http://zeus.ncsa.uiuc.edu:8080/lca_intro_zeus3d.html • CFD Codes: http://icemcfd.com/cfd/CFD_codes.html

  8. Satellite sensors

  9. Living With A Star Research Network Pole Sitter Solar Dynamics Observatory L1 Solar Sentinel Ionospheric Mappers L2 Radiation Belt Mappers Distributed network of spacecraft providing continuous observations •Geospace Dynamics Nework with constellations of smallsats in key regions of geospace.

  10. Cluster & Vortex

  11. Cluster & Doublestar (DSP)

  12. Image Satellite ENA sensors

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