Injection of solar cosmic rays in the ground level event of April 15, 2001

Abstract

The injection of solar cosmic rays with relativistic energies into interplanetary space is calculated within a new model of particle acceleration by shock waves in the solar atmosphere. A comparison of the calculation results and the particle injection in the Easter 2001 Solar Particle Event (April 15, 2001) shows that the levels of magnetic field turbulence generated by Alfven waves differ considerably in the solar atmosphere and interplanetary space. The boundary of a sharp transition between them is at six solar radii. The levels of turbulence behind and ahead of the shock front are the same.