Evidence for two different physical mechanisms for acceleration of solar energetic particles
(SEPs) arose 50 years ago with radio observations of type III bursts, produced by outward …

Energetic particles are accelerated in rich profusion at sites throughout the heliosphere.
They come from solar flares in the low corona, from shock waves driven outward by coronal …

We report on the abundances of energetic particles from impulsive solar flares, including
those from a survey of 228 3 He-rich events, with 3He/4He> 0.1, observed by the ISEE 3 …

Laboratory for High Energy Astrophysics, NASA Goddard Space Flight Center, Greenbelt,
MarylandThe first evidence of high‐energy particles from the Sun was obtained 50 years …

Physics of the Inner Heliosphere gives for the first time a comprehensive and complete
summary of our knowledge of the inner solar system. Using data collected over more than …

The subject of this paper is stochastic acceleration by plasma turbulence, a process akin to
the original model proposed by Fermi. We review the relative merits of different acceleration …

We have studied fine-scale temporal variations in the arrival profiles of∼ 20 keV nucleon-1
to∼ 2 MeV nucleon-1 ions from impulsive solar flares using instrumentation on board the …

Nuclear processes and particle acceleration in solar flares are reviewed. The theory of
gamma-ray and neutron production is discussed and results of calculations are compared to …

We have surveyed 3 He-rich solar energetic particle (SEP) events over the period 1997
September–2003 April in order to characterize abundances of heavy ions near 400 keV …

An analytical quasilinear theory is presented for the evolution of a" gradual" event consisting
of solar energetic particles (SEPs) accelerated at an evolving coronal/interplanetary shock …