EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Moraal & Stoker 1975
Moraal, H. and Stoker, P.H. (1975). The force field approach to the 11-year cosmic ray modulation cycle as observed by stationary neutron monitors. Journal of Geophysical Research 80: doi: 10.1029/JA080i022p03253. issn: 0148-0227.

Observations from five stationary neutron monitors are used to demonstrate certain interesting effects in the 11-year modulation cycle of galactic cosmic rays. These effects are large-scale rigidity-dependent hysteresis structures, steplike modulation changes, and double minima in cosmic ray intensities over the modulation cycle. A technique is developed to interpret these effects in terms of the force field solution of the cosmic ray equation of streaming. It is found that all these effects can be explained in a spherical symmetric modulation model in which the cosmic ray diffusion coefficient is separable in rigidity-dependent and heliocentric-dependent parts. The results are then compared with those of other experiments, and general agreement is found between these experiments. This agreement indicates that the specific force field approach used here is valid. In the final section it is shown, however, that spherical symmetric modulation models, and consequently the force field approximation, may be oversimplifications of the true modulation mechanism.

BACKGROUND DATA FILES

Abstract

Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit