Monday

Magnetic reconnection is an important mechanism to release magnetic energy in various events on the Sun and in the heliosphere and to generate energetic particles by the reconnection electric field in the vicinity of the X-nullpoint. We investigate acceleration of the protons and electrons from the ambient plasma dragged into a current sheet by magnetic diffusion process using PIC approach. We explore the role of the polarisation electric field induced by accelerated particles on their parameters with coalescent and squashed magnetic islands. Particle energy spectra and pitch-angle distributions in current sheets with single and multiple X-nullpoints are presented for different magnetic topologies, magnitudes of magnetic field, proton-to-electron ratios, ambient plasma densities and magnetic island shapes. The simulate parameters are compared with the observations of energetic particles in the solar atmosphere and the heliosphere.