33RD INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE Long-term variations of cosmic ray intensity: theory and experiment

Abstract: To study long-term variations of cosmic ray intensity the base model of cosmic ray modulation in the heliosphere is applied. The model has only one free parameter of modulation- the ratio of the regular magnetic field to the turbulent one and can be used for description of cosmic ray intensity variations in a wide range of energies from 100 MeV to 100 GeV. Earlier by means of this model we managed to achieve a satisfactory agreement between the cosmic ray intensity variation registered in various experiments and the theoretically expected one in the 20th-22nd solar cycles. In the given work at essentially greater value of modulation parameter we have attempted to describe behavior peculiarities of cosmic ray intensity in the 23 rd solar activity cycle mostly correctly