New evidence for geomagnetically trapped anomalous cosmic rays
Authors:
- 15 September 1993
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 20 (18) , 2003-2006
Abstract
We report new observations of ≥ 15 MeV/nuc trapped heavy ions with Z ≥ 2, made on the polar‐orbiting SAMPEX spacecraft in late 1992 and early 1993. A trapped population that includes He, N, O, and Ne is found to be located at L ≈ 2. We conclude that the observed N, O, and Ne ions are “anomalous” cosmic rays, trapped by the mechanism proposed by Blake and Friesen. While it is not expected that this mechanism would also trap anomalous He, the characteristics of the trapped He population are generally consistent with those of N, O, and Ne.Keywords
This publication has 11 references indexed in Scilit:
- An overview of the Solar Anomalous, and Magnetospheric Particle Explorer (SAMPEX) missionIEEE Transactions on Geoscience and Remote Sensing, 1993
- MAST: a mass spectrometer telescope for studies of the isotopic composition of solar, anomalous, and galactic cosmic ray nucleiIEEE Transactions on Geoscience and Remote Sensing, 1993
- Injection of electrons and protons with energies of tens of MeV into L < 3 on 24 March 1991Geophysical Research Letters, 1992
- The cosmic radiation in the heliosphere at successive solar minimaJournal of Geophysical Research, 1992
- Evidence for trapped anomalous cosmic ray oxygen ions in the inner magnetosphereGeophysical Research Letters, 1991
- The charge state of the anomalous component of cosmic raysThe Astrophysical Journal, 1991
- The isotopic composition of the anomalous low-energy cosmic raysThe Astrophysical Journal, 1984
- Cosmic ray drift, shock wave acceleration, and the anomalous component of cosmic raysThe Astrophysical Journal, 1981
- Skylab measurements of low energy cosmic raysSpace Science Reviews, 1980
- An Interpretation of the Observed Oxygen and Nitrogen Enhancements in Low-Energy Cosmic RaysThe Astrophysical Journal, 1974