CaltechAUTHORS
  A Caltech Library Service

Cosmic-ray helium intensities over the solar cycle from ACE

de Nolfo, G. A. and Binns, W. R. and Cohen, C. M. S. and Cummings, A. C. and Davis, A. J. and George, J. S. and Hink, P. L. and Israel, M. H. and Lave, K. and Leske, R. A. and Mewaldt, R. A. and Moskalenko, I. V. and Ogliore, R. C. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. and Yanasak, N. E. (2007) Cosmic-ray helium intensities over the solar cycle from ACE. In: Proceedings of the 30th International Cosmic Ray Conference. Vol.1. Universidad Nacional Autónoma de México , Merida, Yucatan, Mexico, pp. 813-816. http://resolver.caltech.edu/CaltechAUTHORS:20150413-154918541

[img] PDF - Published Version
See Usage Policy.

226Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20150413-154918541

Abstract

Observations of cosmic-ray helium energy spectra provide important constraints on cosmic ray origin and propagation. However, helium intensities measured at Earth are affected by solar modulation, especially below several GeV/nucleon. Observations of helium intensities over a solar cycle are important for understanding how solar modulation affects galactic cosmic ray intensities and for separating the contributions of anomalous and galactic cosmic rays. The Cosmic Ray Isotope Spectrometer (CRIS) on ACE has been measuring cosmic ray isotopes, including helium, since 1997 with high statistical precision. We present helium elemental intensities between ∼10 to ∼100 MeV/nucleon from the Solar Isotope Spectrometer (SIS) and CRIS observations over a solar cycle and compare these results with the observations from other satellite and balloon-borne instruments, and with GCR transport and solar modulation models.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/abs/2008ICRC....1..813DADSArticle
ORCID:
AuthorORCID
Cohen, C. M. S.0000-0002-0978-8127
Additional Information:Copyright Universidad Nacional Autónoma de México This work was supported by NASA at GSFC, Caltech, JPL, and Washington University in St. Louis.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2008-06
Record Number:CaltechAUTHORS:20150413-154918541
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150413-154918541
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56617
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:21 Apr 2015 20:27
Last Modified:12 Sep 2017 03:50

Repository Staff Only: item control page