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Second Annual Report on LWS NASA Grant NAG5-12202 (2003-04) Mary K. Hudson, PI

Second Annual Report on LWS NASA Grant NAG5-12202 (2003-04) Mary K. Hudson, PI.

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Second Annual Report on LWS NASA Grant NAG5-12202 (2003-04) Mary K. Hudson, PI

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  1. Second Annual Report on LWS NASA Grant NAG5-12202 (2003-04)Mary K. Hudson, PI • The following two slides describe test particle simulations using MHD fields from the Lyon-Fedder-Mobary global MHD code; explicit results are shown for the Nov 24 2001 CME-storm event which produced a new (> 25 MeV) proton belt at L=2.5 lasting 2 years; spacecraft data showing formation and loss of new belt (during Nov 2003 storm period) follow (Kress et al., GRL, 2004) • Equatorial plane simulations of plasma sheet electron injection to form electron radiation belt at > 1 MeV inside geosynchronous orbit using MHD fields (Elkington et al, JASTP, 2004) are being compared with 3D model using analytic fields (Dartmouth PhD student Kara Perry)

  2. Test Particle Simulations of Radiation Belts • 2D: Drift motion of electrons and ions in the equatorial plane is followed usingtime-varying fields fromLyon-Fedder-Mobarry MHD simulation • 3D : Drift and bounce motion followed for • electrons, gyromotion included for ions SEP cutoffs calculated using MHD fields

  3. LFM-SEP simulations:Effect of solar wind pressure pulse on SEP cutoff surface modelled using LFM-fields with WIND/ACE input;high density pressure pulse increases SEP exposure

  4. Solar Energetic Proton (SEP) Injection to L=2.5 HEO 1998-068 E>25 MeV Protons WIND Satellite Solar Wind Input Data Note CME-Shock Arrival Nov 24 2001 CME-Shock 2 SEP injection events in Nov 01, produced new trapped proton belt at L=2.5

  5. Rapid Changes in Trapped MeV Particle Fluxes

  6. MHD Fields Injection of RadBelt Electrons Electron simulations by CU/LASP staff scientist and Dartmouth PhD Scot Elkington

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