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The present contribution is dedicated to the investigation of the background conditions for cosmic ray ion ionization state measurements in MONICA experiment. The future experiment MONICA is aimed to study the cosmic ray ion fluxes from H till Ni in energy range 10-300 MeV/n. The experiment main scientific objective is the measurement of the ion ionization state, as well as elemental, isotope composition and energy spectra of Solar Energetic Particle (SEP), Anomalous (ACR) and Galactic (GCR) cosmic ray fluxes. The observation of the ion fluxes will be carried out with high acceptance multilayer semiconductor telescope-spectrometer MONICA installed onboard satellite. The satellite orbit parameters (circular, altitude is about 600 km, polar) were chosen for the realization of the unique method for the measurement of the charge state of the ions with energies >10 MeV/n based on the usage of the Earth magnetic field as a separator of ion charge. To realize the method of the geomagnetic separator it is necessary to detect ions in the Earth magnetosphere at geomagnetic L-shells L<6. At these L-shells the MONICA detectors will be loaded by the trapped energetic particles of the Earth’s outer and inner radiation belts. In present work we have carried out the analysis of the background particle fluxes taking into account the recent data of the satellite experiments and known AE-8, AP-8 models and elaborated the recommendations to improve the background conditions for the MONICA experiment.

The background conditions of cosmic ray ion charge measurements in MONICA experiment