Cosmic ray diurnal anisotropy for a solar magnetic cycle

Details Cosmic ray diurnal anisotropy for a solar magnetic cycle Cosmic ray diurnal anisotropy for a solar magnetic cycle

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41..113a&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 2, p. 113-125.

Computer Science

25

Diurnal Variations, Primary Cosmic Rays, Solar Activity Effects, Solar Cosmic Rays, Anisotropy, Particle Telescopes

Scientific paper

Cosmic ray diurnal anisotropy at high primary rigidities is extended for the 1980-1987 period. The computed values of the limiting primary rigidity for the period vary over the range 30 GV to 200 GV. For the previously studied 1965-1980 period, the mean value of the amplitude of the anisotropy is 0.5 percent. The amplitude of the diurnal anisotropy for 1965 and 1986-1987 is about 20 percent smaller. Very large amplitudes of diurnal variation are observed during the 1982-1985 period, at all primary rigidities. The value of the coupled variable lambda(parallel) x G(r) found to remain constant at about 1 percent for qA less than zero solar magnetic polarity epochs, independent of the primary rigidity. Its value is significantly lower for qA greater than zero epochs.

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