Solar energetic particles: Acceleration and transport
Abstract
This paper reviews highlights of the 26th ICRC in the area of acceleration and propagation of solar energetic particles (SEPs). New results on SEP charge state and composition, a lively topic during the Conference, are covered in an accompanying paper by Klecker. I begin with a brief historical review of the field to provide context for the key advances/developments on SEP acceleration/propagation presented in Salt Lake City. These include: (1) the use of gamma-ray emissions as diagnostics of the acceleration process(es) and probes of the interaction region; (2) the observation of ~10 GeV (or higher) protons for the 6 November 1997 ground level event by the Milagrito experiment; (3) observations of coronal Moreton waves as ``smoking pistols'' of shock acceleration/injection of SEPs; (4) an investigation of the role of proton event spectra in the current ``two-class'' picture of SEP events; (5) an analysis of the Gnevyshev Gap in SEP activity; (6) a Ulysses-based determination of the dependence of SEP mean free path on radial distance from the Sun and on heliographic latitude, and (7) an examination of the dissipation range in the power spectrum of interplanetary magnetic field fluctuations. I conclude with a discussion of new instrumentation (e.g., Milagro, HESSI) and a look to the expected level of SEP activity for the approaching maximum of solar cycle 23. .
- Publication:
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26th International Cosmic Ray Conference, ICRC XXVI
- Pub Date:
- June 2000
- DOI:
- 10.1063/1.1291471
- Bibcode:
- 2000AIPC..516..103C
- Keywords:
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- 96.40.Fg