New observations of gamma-rays in 100 TeV energy domain by HAWC and LHAASO, with future follow up by CTA, open new possibilities for understanding of particle acceleration to extreme energies in astronomical sources in our Milky Way galaxy. These sources, dubbed “PeVatrons” (yet to be identified) produce particles with energies up to several Peta-electronVolt, three orders of magnitude higher than those attained in the most powerful human-made accelerator LHC. They can also be responsible for the astrophysical neutrino signal observed by IceCube neutrino telescope.

The goal of the proposed thesis will be to develop self-consistent realistic model of cosmic ray acceleration and their propagation through Galactic magnetic field, as well as  neutrino and gamma-ray production by individual PeVatrons in the Milky Way and by the entire population of the cosmic ray sources in our Galaxy. The model will be ultimately tested against the data of current and next-generation observation facilities detecting cosmic ray signals (KASCADE-Grande and LHAASO experiments),  gamma-ray signals (Fermi/LAT, HESS, HAWC, LHAASO and CTA) and neutrino signals (IceCube, ANTARES, Km3NET and Baikal telescopes).