Local Organisation:

Jennifer Zaugg

Telephone +41 31 631 48 96

Fax +41 31 631 48 97



Computer Administrator:

Saliba F. Saliba



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Workshop Convenors, ISSI Workshop 16-20 May 2011

Andrei Bykov, Ioffe Physical-Technical Institute, St. Petersburg, Russia, Email:

Robert P. Lin, Space Science Laboratory, University of California Berkeley, USA

John C. Raymond, Harvard-Smithsonian Center for Astrophysics, USA

Manfred Scholer, Max-Planck Institut für Extraterrestrische Physik, Garching, Germany

André Balogh, Email:


Energetic atomic particles are ubiquitous in the Universe, from suprathermal particles in the solar wind at a few keV to the ultra-high energy cosmic rays coming from cosmic particle acceleration sources outside our galaxy. The Workshop’s objective is to provide a forum where a critical review of observations and theory can be confronted across the cosmic scales. It will gather solar system plasma physicists and astrophysicists who will cover the vast range of scales in which accelerated particles are generated. In recent years, considerable progress has been made in observations, theory and computer simulation in the diverse astrophysical contexts from the Earth’s magnetosphere all the way to galactic and extragalactic environments. The novelty of the Workshop is its ambition to bring about a fruitful dialogue between astrophysicists and space plasma physicists and thus to lead to a synthesis of achievements in this research field. The Workshop is intended as the first in a projected series of three on cosmic plasmas.

Examples of spectra of accelerated particles in cosmic plasmas

Typical energy spectra of energetic oxygen nuclei resulting from the various particle populations in the heliosphere. (Adapted from Stone et al., Space Sci. Rev., 86, 1-22, 1998)



The spectrum of particles accelerated at and immediately downstream of a shock observed by the SWICS and ULEIS instrments on ACE. The spectrum has the common spectral shape, a power law with spectral index of -5. This spectrum occurs in many disparate conditions in the heliosphere. (Figure courtesy of L. Fisk)



Energy spectrum of cosmic rays during solar minimum. Separately indicated is the anomalous singly charged O component. The red line illustrates the unmodulated interstellar spectrum. (From Jokipii and Kota, Astrophys. Space Sci. 274, 77–96, 2000)



last update: 17 May 2011