34th Solar Physics Division Meeting, June 2003
Session 21 Parker Lectures II
Invited, Wednesday, June 18, 2003, 5:00-6:00pm, Auditorium

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[21.02] Acceleration of Energetic Charged Particles in Space

J.R. Jokipii (U. Arizona)

Energetic charged particles, or cosmic rays, are ubiquitous in space, and apparently exist whereever the ambient matter density is low enough to permit them to survive. Over the decades since the discovery of cosmic rays, a number of different acceleration mechanisms have been proposed. One of them, diffusive shock acceleration, has been very robust and successful. Inseperable from acceleration is the spatial transport of energetic charged particles. I will discuss the general problem of acceleration and transport in the context of recent spacecraft observations. I will also suggest yet another new mechanism, which provides a natural explanation of inner heliosphere observations indicating particle acceleration in the absence of shocks.


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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.