the magnetosphere and plasmasphere csi 769 3 rd section, oct. – nov. 2005 j. guillory
TRANSCRIPT
• 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
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: 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
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