motivation
stress who's work
typical time profiles
low energies É high energies É so these are distinct particle populations with distinct physical conditions.
In this particular work we are examining the ESP ... and not the SEP.
Also, what we have in mind is a wide sample of events, not necessarily the most intense.
[in other words, physical conditions at the shock, such as the acceleration time, are very different in the interplantary medium than in the solar corona]