The power spectrum of cosmic rays - The low-frequency range 100 GHz-100 kHz

Details The power spectrum of cosmic rays - The low-frequency range 100 GHz-100 kHz The power spectrum of cosmic rays - The low-frequency range 100 GHz-100 kHz

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ncimc...7..413a&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 7 C, July-Aug. 1984, p. 413-426.

Physics

5

Cosmic Rays, Forbush Decreases, Midlatitude Atmosphere, Power Spectra, Solar Activity Effects, Data Correlation, Low Frequencies, Neutron Counters, Radiation Measurement, Sunspots

Scientific paper

The cosmic-ray power spectral density in the frequency band (100 MHz-100 kHz) has been estimated from data of mid- and high-latitude neutron monitors and low latitude ion chamber data. The power spectral density in the band (100 GHz-100 MHz) for mid-latitude neutron data has been inferred from sunspot records. The spectra show an overall 1/f-sq behavior with a plateau in the band (50-1 MHz) which are shown to be due mainly to the Forbush decreases. The solar-rotation peaks are explained by the recurrence effect of the same Forbush decreases. The spectra during solar maxima and minima have similar behavior but differ by a factor of 10 in magnitude. Some anomalies and peaks in the spectrum may be attributed to semi-annual, annual and biannual waves.

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