Whitepaper #239 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: solar physics.
Resolving the physics behind solar flares and CMEs requires continuous 2D spectra throughout these events. Advanced Integral Field Spectrographs now provide previously unachievable multiplexing, making this challenging goal nearly attainable. Immediate technology investment will deliver IFSs enabling space instruments that revolutionize our ability to study the active sun in the coming decade.