Cummings, A. C. and Mewaldt, R. A. and Stone, E. C. (1986) Solar cycle variations of anomalous ^4He as deduced by studies of cosmic ray ^3He. Geophysical Research Letters, 13 (10). pp. 1043-1046. ISSN 0094-8276. doi:10.1029/GL013i010p01043. https://resolver.caltech.edu/CaltechAUTHORS:20140219-103051736
|
PDF
- Published Version
See Usage Policy. 348kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140219-103051736
Abstract
Voyager 1 and 2 observations have been used to derive the energy spectrum of ‘anomalous’ cosmic ray (ACR) helium using a technique based on the separation of the isotopes of He. Previously reported observations show that the ACR oxygen spectrum underwent a change in shape following the solar magnetic field reversal in 1980; in this paper we present evidence for a corresponding change in the ACR helium spectrum. We find that the energy spectra of ACR helium and oxygen and galactic cosmic ray (GCR) ^4He and ^3He can be reproduced both before and after the field reversal using a simple solar modulation model in which the effects of curvature and gradient drifts are arbitrarily neglected.
| Item Type: | Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| |||||||||
| ORCID: |
| |||||||||
| Additional Information: | © 1986 by the American Geophysical Union. Received July 31, 1986; Accepted August 26, 1986. We are grateful to R.E. Vogt for his contributions during his tenure as principal investigator for the Voyager CRS. We also appreciate the contributions of the other Voyager CRS team members at Caltech, Goddard Space Flight Center, and the Universities of Arizona and New Hampshire. This work was supported in part by NASA under contracts NAS 7-918 and NAG5-722, and grant NGR 05-002-160. | |||||||||
| Group: | Space Radiation Laboratory | |||||||||
| Funders: |
| |||||||||
| Issue or Number: | 10 | |||||||||
| DOI: | 10.1029/GL013i010p01043 | |||||||||
| Record Number: | CaltechAUTHORS:20140219-103051736 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140219-103051736 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 43873 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 25 Feb 2014 21:05 | |||||||||
| Last Modified: | 10 Nov 2021 16:44 |
Repository Staff Only: item control page
