The Sun's Magnetic Field and the Diurnal and Seasonal Variations in Cosmic Ray Intensity

Details The Sun's Magnetic Field and the Diurnal and Seasonal Variations in Cosmic Ray Intensity The Sun's Magnetic Field and the Diurnal and Seasonal Variations in Cosmic Ray Intensity

May 1941

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1941rspsa.178...52j&link_type=abstract

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 178, Issue 972, pp. 52-60

Physics

4

Scientific paper

The diurnal and seasonal variations in the vertical cosmic ray intensity, produced by a solar magnetic dipole field, are calculated at latitudes 0 and 45o, and compared with 'observed' data. It appears that the diurnal variation at latitude 45circ can be largely accounted for by assuming the existence of a solar dipole of moment 1\cdot 1 × 1034 gauss cm.3, a value which is consistent with observational evidence. The diurnal variation at the equator, however, cannot be explained by the hypothesis of a solar magnetic dipole field. The seasonal variation in intensity inferred by the above value for the solar dipole moment is of the same order of magnitude as the observational variation, but shows a phase discrepancy of two months.

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