CaltechAUTHORS
  A Caltech Library Service

Variable fractionation of solar energetic particles according to first ionization potential

Mewaldt, R. A. and Cohen, C. M. S. and Leske, R. A. and Christian, E. R. and Cummings, A. C. and Slocum, P. L. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (2000) Variable fractionation of solar energetic particles according to first ionization potential. In: Acceleration and Transport of Energetic Particles Observed in the Heliosphere. AIP Conference Proceedings. No.528. American Institute of Physics , Melville, N.Y., pp. 123-126. ISBN 1-56396-951-3 http://resolver.caltech.edu/CaltechAUTHORS:20111209-071511880

[img]
Preview
PDF - Published Version
See Usage Policy.

372Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20111209-071511880

Abstract

The average composition of solar energetic particles (SEPs), like the solar corona, is known to be depleted in elements with first ionization potential (FIP) more than ~10 eV by a factor of approximately four. We examine evidence for event to event variations in the FIP-related fractionation of SEPs, following up a 1994 study by Garrard and Stone. In a survey of 46 SEP events from 1974 to 1999 the deduced FIP-fractionation varies by a factor of ~2 from event to event, with no apparent relation to charge-to-mass dependent fractionation patterns in these same events. These results are compared to similar variations observed in the solar wind.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1324294DOIUNSPECIFIED
http://link.aip.org/link/?APCPCS/528/123/1PublisherUNSPECIFIED
Additional Information:© 2000 American Institute of Physics. Issue Date: 15 September 2000. This work was supported by NASA at the California Institute of Technology (under grant NAS5- 6912), the Jet Propulsion Laboratory, and Goddard Space Flight Center.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-6912
Goddard Space Flight CenterUNSPECIFIED
JPLUNSPECIFIED
Subject Keywords:solar cosmic ray particles, cosmic ray composition, element relative abundance, ionisation potential, electric charge, solar wind
Classification Code:PACS: 96.40.De
Record Number:CaltechAUTHORS:20111209-071511880
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20111209-071511880
Official Citation:Variable fractionation of solar energetic particles according to first ionization potential R. A. Mewaldt, C. M. S. Cohen, R. A. Leske, E. R. Christian, A. C. Cummings, P. L. Slocum, E. C. Stone, T. T. von Rosenvinge, and M. E. Wiedenbeck, AIP Conf. Proc. 528, 123 (2000), DOI:10.1063/1.1324294
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28380
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:09 Dec 2011 16:08
Last Modified:26 Dec 2012 14:35

Repository Staff Only: item control page