Energetic solar phenomena – including flares, coronal mass ejections (CMEs), coronal heating, and the solar wind – and the underlying processes of particle acceleration and plasma heating shape the heliosphere and radiate diagnostic signatures across the electromagnetic spectrum. Diverse missions, from large (e.g., Explorers, flagships) to small (e.g., sounding rockets, balloons, CubeSats) have advanced our understanding while revealing key gaps that require advanced, next-generation measurements to resolve the many spatial, temporal, and spectral scales relevant to energy release and transport. High-resolution, high-cadence imaging, spectroscopy, polarimetry, and novel remote-sensing techniques – spanning the photosphere, inner/middle/outer corona, and inner heliosphere – are vital for comprehensively and holistically probing these complex high-energy phenomena.

This session invites presentations on innovative instruments, enabling technologies, new missions and concepts, first-light results, and remote-sensing observational strategies and modeling – and the science these all enable – to transform our understanding of high-energy solar processes.