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Drift Calculations on the Modulation of Anomalous Cosmic Rays During the 1998 Solar Minimum Period

Steenberg, C. D. and Cummings, A. C. and Stone, E. C. (1999) Drift Calculations on the Modulation of Anomalous Cosmic Rays During the 1998 Solar Minimum Period. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.7. International Union of Pure and Applied Physics , pp. 593-596.

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We present full-drift solutions of the two-dimensional cosmic ray transport equation in an ongoing study to explain ACR observations made in the outer heliosphere. Calculated spectra are compared to 1998 ACR H, He, 0, N, and Ne observations from Voyager I and 2. It is found that the modulation is dominated by diffusion at the spacecraft positions and that the spectra of all the above species can be reasonably explained using a single set of modulation parameters. These include diffusion mean free paths with a magnitude significantly smaller at the shock than at the spacecraft positions.

Item Type:Book Section
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URLURL TypeDescription
Cummings, A. C.0000-0002-3840-7696
Stone, E. C.0000-0002-2010-5462
Additional Information:© University of Utah. Provided by the NASA Astrophysics Data System. Supported by NASA at Caltech (contract NAS7-9l 8).
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1999-07
Record Number:CaltechAUTHORS:20150211-091921800
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54700
Deposited By: Deborah Miles
Deposited On:13 Feb 2015 14:48
Last Modified:20 Feb 2020 14:33

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