The simulation of complete 11 and 12 year modulation cycles for cosmic rays in the heliosphere using a drift model with global merged interaction regions

1995 ◽  
Vol 442 ◽  
pp. 847 ◽  
Author(s):  
J. A. Le Roux ◽  
M. S. Potgieter
Keyword(s):  
Cosmic Rays ◽  
Drift Model ◽  
Interaction Regions

A drift model for the modulation of galactic cosmic rays

1985 ◽  
Vol 294 ◽  
pp. 425 ◽  
Author(s):  
M. S. Potgieter ◽  
H. Moraal
Keyword(s):  
Cosmic Rays ◽  
Galactic Cosmic Rays ◽  
Drift Model

The role of merged interaction regions and drafts in the heliospheric modulation of cosmic rays beyond 20 AU - A computer simulation

1993 ◽  
Vol 403 ◽  
pp. 760 ◽  
Author(s):  
M. S. Potgieter ◽  
J. A. Le Roux ◽  
L. F. Burlaga ◽  
F. B. McDonald
Keyword(s):  
Computer Simulation ◽  
Cosmic Rays ◽  
Interaction Regions

Role of drifts and global merged interaction regions in the long-term modulation of cosmic rays

1993 ◽  
Vol 98 (A2) ◽  
pp. 1243-1256 ◽  
Author(s):  
Frank B. McDonald ◽  
Nand Lal ◽  
Robert E. McGuire
Keyword(s):  
Cosmic Rays ◽  
Interaction Regions

Cosmic ray modulation in high and middle latitudes during solar cycles 22 and 23

2015 ◽  
Vol 93 (1) ◽  
pp. 100-104 ◽  
Author(s):  
Kingsley Chukwudi Okpala ◽  
Francisca Nneka Okeke ◽  
Anselem Ikechukwu Ugwuoke
Keyword(s):  
Cosmic Rays ◽  
Dynamic Pressure ◽  
Cosmic Ray ◽  
Galactic Cosmic Rays ◽  
Proton Density ◽  
Solar Cycles ◽  
Middle Latitudes ◽  
Cosmic Ray Modulation ◽  
Interaction Regions

Galactic cosmic rays are modulated in the heliosphere primarily by the global merged interaction regions with intense magnetic fields, which leads to a decrease in galactic cosmic rays throughout the heliosphere. Using long-term averages of solar wind (SW) component parameters in addition to cosmic ray count rates of four neutron monitors with different rigidity cutoffs, we analyzed the effect of these SW components on the count rates under different interplanetary magnetic field (IMF) disturbance levels. From first-order partial correlation, we found that the IMF-B was the most dominant modulating parameter, especially during quiet conditions and the SW dynamic pressure was more effective during disturbed conditions. The influence of more subtle parameters like wind speed, Bz component, and proton density were masked by these dominant parameters: IMF total B, and SW dynamic pressure.

The intensity variation of cosmic rays associated with corotating interaction regions

1999 ◽  
Vol 23 (3) ◽  
pp. 591-594
Author(s):  
K Kondoh ◽  
N Hasebe ◽  
T Doke ◽  
J Kikuchi ◽  
T Takashima ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Intensity Variation ◽  
Corotating Interaction Regions ◽  
Interaction Regions
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