Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh61b05d&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH61B-05
Physics
7514 Energetic Particles (2114), 7536 Solar Activity Cycle (2162), 7807 Charged Particle Motion And Acceleration, 7851 Shock Waves
Scientific paper
Since its August 1997 launch, energetic particle instruments onboard the ACE spacecraft have observed many events associated with corotating interaction regions (CIRs). Unlike CIRs occurring near solar minimum, the CIRs seen recently by ACE take place during a very active part of the solar cycle and, consequently, are often difficult to pick out from the many enhancements from solar particle events. While signatures of CIRs in the magnetic field and plasma data are well known, we have investigated signatures in the energetic particle data that also can be used to identify these events. In particular, using data from the Ultra Low Energy Isotope Spectrometer (ULEIS) onboard the ACE spacecraft, which measures ions in the 0.02 - 5 MeV/nuc range, we discuss signatures in the composition and energy spectra that are characteristic of these events. We will compare these results with plasma and magnetic field data and with energetic particle data measured near solar minimum by the WIND spacecraft.
Desai Mihir I.
Dwyer Joesph R.
Mason Glenn M.
Mazur J. E.
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