Observations of the ionization states of energetic particles accelerated in solar flaresThe ionization states and spectra of 0.3 to 2.4 MeV/nuc He, C, O and Fe are measured in a survey of ten solar flare particle events. He(plus) is found to be present in all events, which indicates the common presence of energetic He(plus) in the source material from which solar particles are accelerated. The distribution functions of He(plus), He(plus plus) and heavier elements are represented by simple exponentials of the particle speed times its rigidity to a power n, where n is between 0 and 1, and equal e-folding values. Results are consistent with a model where ions are accelerated in the corona by multi-dimensional shocks out of a population taken from both hot and cold coronal regions.
Document ID
19820039072
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Gloeckler, G. (Maryland Univ. College Park, MD, United States)
Weiss, H. (Maryland Univ. College Park, MD, United States)
Ipavich, F. M. (Maryland, University College Park, MD, United States)
Hovestadt, D. (Maryland Univ. College Park, MD, United States)
Klecker, B. (Maryland Univ. College Park, MD, United States)
Scholer, M. (Max-Planck-Institut fuer extraterrestrische Physik Garching, Germany)
Fisk, L. A. (New Hampshire, University Durham, NH, United States)
Fan, C. Y. (Arizona, University Tucson, AZ, United States)
Ogallagher, J. J. (Chicago, University Chicago, IL, United States)