How does the global structure of the interplanetary magnetic field affect cosmic ray modulation? |
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Authors: | J Kóta |
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Institution: | Central Research Institute for Physics, Budapest, Hungary |
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Abstract: | Force-field theory is studied in 3-dimension using the full diffusion tensor incorporating drift effects. An analytical approximate solution is deduced under some assumptions which include a flat neutral sheet and a non-uniform density distribution at the outer boundary. By contrast with the usual force-field theory, our solution gives a large and charge dependent latitudinal gradient and near perfect isotropy, even corotation disappears. The results are in general agreement with the numerical calculations of Jokipii and Kopriva. |
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