Published September 2, 2003
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How Common is Energetic ^3He in the Inner Heliosphere?
Abstract
Using data from the SIS and ULEIS instruments on the Advanced Composition Explorer (ACE) we have identified periods during which energetic ^3He is present in near-Earth interplanetary space between November 1997 and May 2002. The data, which cover the energy intervals 0.2–1 MeV/nuc (ULEIS) and 4.5–16.3 MeV/nuc (SIS), show that ^3He is present a significant fraction of the time, as would be required if these suprathermal particles were the major source of the ^3He being accelerated by shocks in the interplanetary medium. Specifically, we find that energetic ^3He is present at least ~ 60% of the time, and perhaps significantly more often.
Additional Information
© 2003 American Institute of Physics. Issue Date: September 2, 2003. This work was supported by the National Aeronautics and Space Administration at the California Institute of Technology and the Jet Propulsion Laboratory under grant NAG5-6912 and at the University of Maryland under grant PC 251429.Attached Files
Published - WIEaipcp03.pdf
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Additional details
- Eprint ID
- 27486
- Resolver ID
- CaltechAUTHORS:20111028-100805937
- NAG5-6912
- NASA
- PC 251429
- University of Maryland
- Created
-
2011-10-28Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory
- Series Name
- AIP Conference Proceedings
- Series Volume or Issue Number
- 679
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 2003-58