# Coupled MHD-Focused Transport Simulations for Modeling Solar Particle Events

## TL;DR

This paper introduces the initial version of the STAT tool, which models solar energetic particle events by combining MHD and focused transport simulations to analyze CME-driven SEP acceleration and transport.

## Contribution

The paper presents a novel integrated simulation tool, STAT, combining CORHEL and EMMREM components for detailed modeling of solar particle events.

## Key findings

- Successful modeling of the Bastille Day event
- Innovative diagnostics for 3D particle flux distribution
- Preliminary agreement with NOAA measurements

## Abstract

We describe the initial version of the Solar Particle Event (SPE) Threat Assessment Tool or STAT. STAT relies on elements of Corona-Heliosphere (CORHEL) and the Earth-Moon-Mars Radiation Environment Module (EMMREM), and allows users to investigate coronal mass ejection (CME) driven SPEs using coupled magnetohydrodynamic (MHD) and focused transport solutions. At the present time STAT focuses on modeling solar energetic particle (SEP) acceleration in and transport from the low corona, where the highest energy SEP events are generated. We illustrate STAT's capabilities with a model of the July 14, 2000 "Bastille Day" event, including innovative diagnostics for understanding the three-dimensional distribution of particle fluxes and their relation to the structure of the underlying CME driver. A preliminary comparison with NOAA GOES measurements is shown.