New Tools to Discover the Physical Links From CME Eruptions to Radiation Effects in Deep Space: a First in Heliospheric End-to-End Coupling
Abstract
We've taken fundamental new steps in physics based coupling; combining MHD simulation results with our fully 3D Lagrangian code has allowed us to attain flux and dosage rates out to 1AU. The Earth-Moon-Mars Radiation Environment Module (EMMREM) is a collection of tools based on the output of the Energetic Particle Radiation Environment Model (EPREM), which solves the focused transport equation to determine energetic particles fluxes [1]. We feed resulting flux from EPREM into the Baryon Transport (BRYNTRYN) code developed at NASA to calculate dose rates and accumulated dosages. Recently we have coupled EPREM to Magnetohydrodynamics Around a Sphere (MAS) developed at Predictive Science, Inc. [2]. The MAS / EPREM couplings allow us to accurately model the physics of evolving CMEs and their impact on the acceleration of SEPs. We detail physical regimes associated with strong and weak scattering of energetic particles near shocks, both by background magnetic field flux and self-excited waves. Results from both weak and severe SEP events will be presented, along with a comparison of the results with CRaTER and GOES data. Validation of the coupling and the implications for predicting dose rates at 1AU will also be discussed. This critical step in the evolution of code coupling enables us to explore, discover, and ultimately predict connections between SEP events and their effects on the space environment through the inner heliosphere. Thus, we present fundamental new modeling capabilities that provide critical insights into the physical causes and behavior of extreme solar events. [1] Schwadron, N. A. and A. L. Townsend, et al. (2010) Space Weather Journal, Vol. 8, S00E02. [2] Linker, J. A. and Z. Mikić, et al. (1999) J. Geophys. Res., 104(A5), 9808-9830.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSH31A2216G
- Keywords:
-
- 7500 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7513 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Coronal mass ejections;
- 7514 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Energetic particles;
- 7519 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Flares