Authors: Adam Szabo (NASA GSFC), S. Kanekal (NASA GSFC), J. Kasper (BWXT), S. Lepri (U. Michigan), J. Raines (U. Michigan), S. Bale (UC Berkeley), G. Ho (JHU APL), N. Raouafi (JHU APL), N. Hurburt (Lockheed Martin)

Interplanetary Coronal Mass Ejections (ICMEs) have been studied for decades using various methods and observational tools; however, their internal structure, transport and evolution in the inner heliosphere remains poorly understood. Similarly, the transport and diffusion of solar energetic particles on their way to 1 AU is surrounded by controversy. A new multi-spacecraft mission concept (HELIX) that was studied by both a NASA Goddard and an JHU/APL engineering team and was presented to the current Heliophysics Decadal Survey will be described in detail.