Simulation of a long bunch breaking up into solitons in the BNL booster synchrotron.   #accelerators #physics  This required setting focussing magnets to much weaker than normal and starting with a dense, high space-charge bunch.   Doing this experiment in practice could be a precursor to crystalline beams, as when Coulomb crystals are put in place of the solitons here, they heat up by less than 1 Kelvin/second.<p><video src='posts/202512/post-20251208-181138-a.mp4' loading='lazy' preload='metadata' controls></video></p>