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Particle Acceleration by Cme-driven Shock WavesIn the largest solar energetic particle (SEP) events, acceleration occurs at shock waves driven out from the Sun by coronal mass ejections (CMEs). Peak particle intensities are a strong function of CME speed, although the intensities, spectra, and angular distributions of particles escaping the shock are highly modified by scattering on Alfven waves produced by the streaming particles themselves. Element abundances vary in complex ways because ions with different values of Q/A resonate with different parts of the wave spectrum, which varies with space and time. Just recently, we have begun to model these systematic variations theoretically and to explore other consequences of proton-generated waves.
Document ID
20000021168
Acquisition Source
Goddard Space Flight Center
Document Type
Other
Authors
Reames, Donald V.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1999
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: International Cosmic Ray Conference
Location: Salt Lake City, UT
Country: United States
Start Date: August 17, 1999
End Date: August 25, 1999
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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