Guillory Magnetosphere Plasmasphere

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Published on November 15, 2007

Author: Spencer

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The Magnetosphere and Plasmasphere:  The Magnetosphere and Plasmasphere CSI 769 3rd section, Oct. – Nov. 2005 J. Guillory Slide2:  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:  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:  Magnetic field geometry Charged particle orbits, static B::  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:  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 Slide7:  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 Satellite sensors:  Satellite sensors Slide9:  Living With A Star Research Network Solar Dynamics Observatory Pole Sitter Radiation Belt Mappers Ionospheric Mappers L1 Solar Sentinel L2 Distributed network of spacecraft providing continuous observations •Geospace Dynamics Nework with constellations of smallsats in key regions of geospace. Slide10:  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 & Vortex Cluster & Doublestar (DSP):  Cluster & Doublestar (DSP) Image Satellite ENA sensors:  Image Satellite ENA sensors

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