Expected Relative Role of Convection-Diffusion and Drift Mechanisms in Long-Term Variation for Small Cosmic Ray Energies

Details Expected Relative Role of Convection-Diffusion and Drift Mechanisms in Long-Term Variation for Small Cosmic Ray Energies Expected Relative Role of Convection-Diffusion and Drift Mechanisms in Long-Term Variation for Small Cosmic Ray Energies

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.3855d&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

The hysteresis effect for small energies of galactic CR is formatted by two causes: the first is the delay of the interplanetary processes responsible for cosmic ray modulation with respect to the initiating solar processes, which corresp ond to some effective velocity of solar wind and shock waves propagation (that the observed intensity is formatted by solar activity variations during many month before the time of CR measurement), and the second is caused by the time delay of small energy CR diffusion from the boundary of modulation region to the Earth's orbit. We develop our model described the connection between solar activity variation and CR convection-diffusion global modulation with taking into account also the time-lag of the small energy particle diffusion in the Heliosphere. We analyzed the theoretical results on drifts and take into account the dependence from the sign of primary particles, and from the sign of polar magnetic field (A>0 or A<0). The dimension of modulation region will be determined by Xomax, at what the correlation coefficient between the expected CR intensity and observed one reaches the maximum value. This research is partly supported by INTAS grant No. 00810.

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