Space Weather Effects: Decay Phases in Gradual and Impulsive Solar Energetic Particle Events
Final rept. 5 Jun 2001-3 Oct 2003
MOSCOW STATE UNIV (RUSSIA)
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This report results from a contract tasking Skobeltsyn Nuclear Physics Institute of Moscow State University as follows This is an investigation of the decay phases of gradual and impulsive solar energetic particle SEP events associated and non-associated to coronal mass ejections CMEs and CME-driven shocks. The contractor will use the multispacecraft ms data obtained in the 1970s and 1980s to develop understanding of processes of particle transport and losses and the role of travelling shocks for formation of particle intensity-time profiles at late phase of event at different radial distances and heliologitudes of the observer. This will be done based on a database of energetic protons, alphas and electrons, as well as solar wind and interplanetary magnetic field, from the Prognoz, the Venera, the Vega, the Phobos 2, the Helios and IMP 7,8 spacecraft. The correlated observations will be used to test modern models of SEP event formation. Practical application of the results to be obtained is related to the problems of space weather, as well as radiation hazards during manned space missions and radiation affects on materials and instruments.