Ionic charge state measurements during He(+)-rich solar particle events

Details Ionic charge state measurements during He(+)-rich solar particle events Ionic charge state measurements during He(+)-rich solar particle events

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281..463h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 281, June 1, 1984, p. 463-467. Sponsorship: Bundesministerium für Forschung

Astronomy and Astrophysics

Astrophysics

9

Energetic Particles, Ion Charge, Particle Acceleration, Solar Corona, Solar Flares, Ferric Ions, Helium Ions, International Sun Earth Explorer 3, Oxygen Ions, Solar Wind

Scientific paper

Ionic 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.

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