Abstract
The plasma which flows into the contact region of two sunspots of opposite polarity (which is named “the neutral sheet”) induces an electric field. This induced electric field can accelerate a part of the charged particles. We show that the charged particle can reach an energy of a few Mev within a short time less than one second.
By comparing the energy gain from the induced electric field with the energy loss by the surrounding matter, it is shown that 0.046% of the surrounding protons in the neutral sheet can be accelerated to the high energy particles at kinetic temperature T0=105°K and density N=1012cm-3 of the surrounding matter.
