Gamma-flares at the Sun: dynamics of accelerated ions in eruptive and posteruptive coronal arches

Based on the results of complex analysis of multiwave solar data (X- and gamma radiation, optical observations, data on energetic solar protons, etc.) we suggest a new topological model for the source (magnetic mirror trap - “probkotron”) and a new scenario of 23 July 2002 and October 2003 solar events. The model assumes particle (ions) acceleration by the electric field in eruptive arches of fast coronal mass ejection. The dynamics of ions trapped and accelerated to the energies of ~10-100 MeV/nucleon in a current magnetic arch with a magnetic mirror in its foot-point. Within the frame of the model, we interpret the presence of both single and double gamma sources in 2.223 MeV emission line. The sources are related to eruptive (23 July 2002) and posteruptive (28 October 2003) arches respectively, and they are shifted relative to hard X-radiation sources. One of the consequences of the model is that the gamma source in ~4.1-6.7 MeV excitation lines has to coincide with the region of interaction of accelerated particles, and the source of secondary neutrons near the limb seems to be more effective than at the solar disk.