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Ionic charge state measurements during He(+)-rich solar particle eventsIonic charge state measurements of carbon, oxygen, and iron in He(+)-rich energetic particle events are presented. The data have been obtained with the Max-Planck-Institut/University of Maryland sensor system on the ISEE 3 spacecraft. The ionic charge states cannot be explained in terms of a model in which the coronal temperature determines a charge equilibrium which is subsequently frozen-in nor in terms of charge exchange during transition through coronal matter after acceleration. It is concluded that the acceleration and probably also the injection process is biased against particles with high mass-to-charge ratios. The plasma injected into the acceleration process must consist of material of cold (not greater than 8.5 x 10 to the 4th K) as well as hot (2.5 x 10 to the 6th K) origin. The cold material must be more abundant than the hot material.
Document ID
19840053561
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hovestadt, D.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Klecker, B.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Scholer, M.
(Max-Planck-Institut fuer Physik und Astrophysik Garching, Germany)
Gloeckler, G.
(Maryland, University College Park, MD, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 281
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
84A36348
Funding Number(s)
CONTRACT_GRANT: NAS5-20062
CONTRACT_GRANT: BMFT-01-OI-017-ZA/WF/WRK-275/4
CONTRACT_GRANT: BMFT-RV14-B8/74
Distribution Limits
Public
Copyright
Other

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