Rapid recovery of anomalous cosmic ray flux at 1 AU in solar cycle 22

Details Rapid recovery of anomalous cosmic ray flux at 1 AU in solar cycle 22 Rapid recovery of anomalous cosmic ray flux at 1 AU in solar cycle 22

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.3027h&link_type=abstract

Geophysical Research Letters, Volume 21, Issue 25, p. 3027-3030

Physics

10

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Heliopause And Solar Wind Termination

Scientific paper

A new observation of low energy cosmic ray particles with the energies from 4 to 120 MeV/n by the HEP instrument onboard the GEOTAIL satellite orbiting at 1 AU shows a remarkable enhancement of anomalous cosmic ray (ACR) N, O and NE in the period September 1992-December 1993 before approaching to the solar minimum in solar cycle 22. The ACR fluxes obtained by the GEOTAIL observation are in good agreement with the results earlier obtained from the SAMPEX satellite [Mewaldt et al. 1993a,b]. The ACR carbon is also evident though the C enhancement is small compared with those of N, O and Ne. We confirm the new SAMPEX finding that the ACR fluxes have recovered more rapidly in 1992-1993 than in previous solar cycles and find this tendency continues to the end of 1993.

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