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Measurements of the Ionic Charge States of Solar Energetic Particles at 15-70 MeV/nucleon

Leske, R. A. and Cummings, J. R. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. (1995) Measurements of the Ionic Charge States of Solar Energetic Particles at 15-70 MeV/nucleon. In: Proceedings of the 24th International Cosmic Ray Conference. Vol.4. International Union of Pure and Applied Physicists , Rome, Italy, pp. 461-464.

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The mean charge states of abundant heavy ions with ~15 - 70 MeV/n in the two large solar energetic particle (SEP) events of 1992 October 30 and November 2 have been determined using measurements of invariant latitude of the geomagnetic cutoffs as a function of time, particle energy, and element from the Mass Spectrometer Telescope (MAST) on SAMPEX. The deduced charge state values are in good agreement with the mean values measured directly in previous SEP events at much lower energies of ~1 MeV/n, with inferred equilibrium source temperatures of typically 2 x 10^6 K, which provides additional evidence that SEPs in gradual-type events are accelerated coronal material.

Item Type:Book Section
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URLURL TypeDescription
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Additional Information:© 1995 IUPAP. Provided by the NASA Astrophysics Data System. This work was supported by NASA under contract NAS5-30704 and grant NAGW-1919.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1995-23
Record Number:CaltechAUTHORS:20150126-153006623
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54094
Deposited By: Tony Diaz
Deposited On:27 Jan 2015 21:14
Last Modified:20 Feb 2020 14:33

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