Solar Energetic Particle Spectral Breaks

Journal Article · Mon Aug 01 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2032701· OSTI ID:20719185

Mewaldt, R A; Cohen, C M.S.; Labrador, A W; Cummings, A C; Leske, R A; Stone, E C ^[1]; Mason, G M; Desai, M I ^[2]; Looper, M L; Mazur, J E ^[3]; Haggerty, D E ^[4]; Maclennan, C G ^[5]; Li, G ^[6]; Wiedenbeck, M E ^[7]

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1. California Institute of Technology, Pasadena CA 91125 (United States)
2. University of Maryland, College Park, MD 20742 (United States)
3. Aerospace Corporation, Los Angeles, CA 90245 (United States)
4. Johns Hopkins University, Applied Physics Laboratory, Laurel MD 207232 (United States)
5. Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 (United States)
6. IGPP, University of California, Riverside, CA 92521 (United States)
7. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91007 (United States)

The five large solar particle events during October-November 2003 presented an opportunity to test shock acceleration models with in-situ observations. We use solar particle spectra of H to Fe ions, measured by instruments on ACE, SAMPEX, and GOES-11, to investigate the Q/M-dependence of spectral breaks in the 28 October 2003 event. We find that the break energies scale as (Q/M)b with b {<=} 1.56 to 1.75, somewhat less than predicted. We also conclude that SEP spectra >100 MeV/nucleon are best fit by a double power-law shape.

• OSTI ID: 20719185
• Journal Information: AIP Conference Proceedings, Vol. 781, Issue 1; Conference: 4. annual IGPP international astrophysics conference, Palm Springs, CA (United States), 26 Feb - 3 Mar 2005; Other Information: DOI: 10.1063/1.2032701; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ENERGY SPECTRA
HYDROGEN IONS
IRON IONS
SHOCK WAVES
SOLAR PARTICLES