Energetic particles play a key role in many impulsive processes (e.g flares, substorms) in the solar corona, planetary atmospheres and interplanetary space. They are practically important as one of the essential links between solar activity and space weather.

The aim of this session is to discuss recent theoretical and observational results concerning the acceleration and transport of non-thermal particles in the heliosphere.  In particular we will focus on the following problems:
- Particle acceleration models in the solar corona and planetary magnetospheres.
- Observational detection of energetic electrons and ions in the solar atmosphere and the heliosphere.
- Solar and cosmic ray particle precipitation in planetary atmospheres.
- The impact of energetic particles on space weather and modern technology.

We encourage submissions from observers and modelers of solar energetic particles and those investigating the impact of energetic particles on the terrestrial and other planetary atmospheres.