Energy spectrum of the 11-variation of galactic cosmic rays for different solar magnetic cycles

Details Energy spectrum of the 11-variation of galactic cosmic rays for different solar magnetic cycles Energy spectrum of the 11-variation of galactic cosmic rays for different solar magnetic cycles

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc...10.4277i&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

Neutron monitors data for 1957-1999 has been used to study the role of drift effect in the temporal changes of the energy spectrum index of the isotropic intensity variations of galactic cosmic rays for different qA>0 and qA<0 solar magnetic cycles. It is shown that the various character in the changes of the profiles of galactic cosmic ray intensity causing by drift effects for different qA>0 and qA<0 solar magnetic cycles (plateau and pick profiles in the qA>0 and in the qA<0, respectively) has not revealed in the temporal changes of the energy spectrum index of the isotropic intensity variations of galactic cosmic rays. A comparison of the changes of the energy spectrum index of the isotropic intensity variations obtained from experimental data of the neutron monitors with the expected changes obtained from the theoretical modeling of Parker's 2-D transport equation has been done. It is concluded that the decisive role in the formation of the 11-year variation of galactic cosmic rays (the amplitude of the 11-year variation) belongs to the structural changes of the fluctuations of the interplanetary magnetic field during the ascending and descending periods of solar activity.

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